Class Postgres

PostgreSQL layer for DBO.

Object
Extended by DataSource
Extended by DboSource
Extended by Postgres
Package: Cake\Model\Datasource\Database
Copyright: Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
License: MIT License
Location: Cake/Model/Datasource/Database/Postgres.php

Properties summary

  • $_baseConfig protected
    array
    Base driver configuration settings. Merged with user settings.
  • $_sequenceMap protected
    array

    Contains mappings of custom auto-increment sequences, if a table uses a sequence name other than what is dictated by convention.

  • $_sqlOps protected
    array
    The set of valid SQL operations usable in a WHERE statement
  • $columns public
    array
    Columns
  • $description public
    string
    Driver description
  • $endQuote public
    string
    Ending Quote
  • $startQuote public
    string
    Starting Quote

Inherited Properties

Method Summary

  • _alterIndexes() protected
    Generate PostgreSQL index alteration statements for a table.

  • Auxiliary function to quote matched (Model.fields) from a preg_replace_callback call Quotes the fields in a function call.

  • alterSchema() public
    Alter the Schema of a table.
  • boolean() public
    Translates between PHP boolean values and PostgreSQL boolean values
  • buildColumn() public
    Generate a Postgres-native column schema string
  • buildIndex() public
    Format indexes for create table
  • column() public
    Converts database-layer column types to basic types
  • connect() public
    Connects to the database using options in the given configuration array.
  • describe() public
    Returns an array of the fields in given table name.
  • enabled() public
    Check if PostgreSQL is enabled/loaded
  • fetchResult() public
    Fetches the next row from the current result set
  • fields() public
    Generates the fields list of an SQL query.
  • getEncoding() public
    Gets the database encoding
  • Gets the schema name
  • getSequence() public
    Gets the associated sequence for the given table/field
  • index() public
    Returns an array of the indexes in given datasource name.
  • Returns the ID generated from the previous INSERT operation.
  • length() public
    Gets the length of a database-native column description, or null if no length
  • limit() public
    Returns a limit statement in the correct format for the particular database.
  • listSources() public
    Returns an array of tables in the database. If there are no tables, an error is raised and the application exits.
  • name() public
    Prepares field names to be quoted by parent
  • Check if the server support nested transactions
  • Overrides DboSource::renderStatement to handle schema generation with Postgres-style indexes

  • Reset a sequence based on the MAX() value of $column. Useful for resetting sequences after using insertMulti().

  • resultSet() public
    resultSet method
  • setEncoding() public
    Sets the database encoding
  • truncate() public
    Deletes all the records in a table and drops all associated auto-increment sequences
  • value() public
    Returns a quoted and escaped string of $data for use in an SQL statement.

Method Detail

_alterIndexes()source protected 

_alterIndexes( string $table , array $indexes )

Generate PostgreSQL index alteration statements for a table.

Parameters

string $table
Table to alter indexes for
array $indexes
Indexes to add and drop

Returns

array
Index alteration statements

_quoteFunctionField()source protected 

_quoteFunctionField( string $match )

Auxiliary function to quote matched (Model.fields) from a preg_replace_callback call Quotes the fields in a function call.

Parameters

string $match
matched string

Returns

string
quoted string

alterSchema()source public 

alterSchema( array $compare , string $table null )

Alter the Schema of a table.

Parameters

array $compare
Results of CakeSchema::compare()
string $table optional null
name of the table

Returns

array

Overrides

DboSource::alterSchema()

boolean()source public 

boolean( mixed $data , boolean $quote false )

Translates between PHP boolean values and PostgreSQL boolean values

Parameters

mixed $data
Value to be translated
boolean $quote optional false
true to quote a boolean to be used in a query, false to return the boolean value

Returns

boolean
Converted boolean value

Overrides

DboSource::boolean()

buildColumn()source public 

buildColumn( array $column )

Generate a Postgres-native column schema string

Parameters

array $column

An array structured like the following: array('name'=>'value', 'type'=>'value'[, options]), where options can be 'default', 'length', or 'key'.

Returns

string

Overrides

DboSource::buildColumn()

buildIndex()source public 

buildIndex( array $indexes , string $table null )

Format indexes for create table

Parameters

array $indexes
The index to build
string $table optional null
The table name.

Returns

string

Overrides

DboSource::buildIndex()

column()source public 

column( string $real )

Converts database-layer column types to basic types

Parameters

string $real
Real database-layer column type (i.e. "varchar(255)")

Returns

string
Abstract column type (i.e. "string")

Overrides

DataSource::column()

connect()source public 

connect( )

Connects to the database using options in the given configuration array.

Returns

boolean
True if successfully connected.

Throws

MissingConnectionException

describe()source public 

describe( Model|string $model )

Returns an array of the fields in given table name.

Parameters

Model|string $model
Name of database table to inspect

Returns

array
Fields in table. Keys are name and type

Overrides

DataSource::describe()

enabled()source public 

enabled( )

Check if PostgreSQL is enabled/loaded

Returns

boolean

Overrides

DataSource::enabled()

fetchResult()source public 

fetchResult( )

Fetches the next row from the current result set

Returns

array

Overrides

DboSource::fetchResult()

fields()source public 

fields( Model $model , string $alias null , mixed $fields array() , boolean $quote true )

Generates the fields list of an SQL query.

Parameters

Model $model
The model to get fields for.
string $alias optional null
Alias table name.
mixed $fields optional array()
The list of fields to get.
boolean $quote optional true
Whether or not to quote identifiers.

Returns

array

Overrides

DboSource::fields()

getEncoding()source public 

getEncoding( )

Gets the database encoding

Returns

string
The database encoding

getSchemaName()source public 

getSchemaName( )

Gets the schema name

Returns

string
The schema name

Overrides

DataSource::getSchemaName()

getSequence()source public 

getSequence( string|Model $table , string $field 'id' )

Gets the associated sequence for the given table/field

Parameters

string|Model $table
Either a full table name (with prefix) as a string, or a model object
string $field optional 'id'
Name of the ID database field. Defaults to "id"

Returns

string
The associated sequence name from the sequence map, defaults to "{$table}_{$field}_seq"

index()source public 

index( string $model )

Returns an array of the indexes in given datasource name.

Parameters

string $model
Name of model to inspect

Returns

array
Fields in table. Keys are column and unique

Overrides

DboSource::index()

lastInsertId()source public 

lastInsertId( string $source null , string $field 'id' )

Returns the ID generated from the previous INSERT operation.

Parameters

string $source optional null
Name of the database table
string $field optional 'id'
Name of the ID database field. Defaults to "id"

Returns

integer

Overrides

DboSource::lastInsertId()

length()source public 

length( string $real )

Gets the length of a database-native column description, or null if no length

Parameters

string $real
Real database-layer column type (i.e. "varchar(255)")

Returns

integer
An integer representing the length of the column

Overrides

DboSource::length()

limit()source public 

limit( integer $limit , integer $offset null )

Returns a limit statement in the correct format for the particular database.

Parameters

integer $limit
Limit of results returned
integer $offset optional null
Offset from which to start results

Returns

string
SQL limit/offset statement

Overrides

DboSource::limit()

listSources()source public 

listSources( mixed $data null )

Returns an array of tables in the database. If there are no tables, an error is raised and the application exits.

Parameters

mixed $data optional null
The sources to list.

Returns

array
Array of table names in the database

Overrides

DataSource::listSources()

name()source public 

name( string $data )

Prepares field names to be quoted by parent

Parameters

string $data
The name to format.

Returns

string
SQL field

Overrides

DboSource::name()

nestedTransactionSupported()source public 

nestedTransactionSupported( )

Check if the server support nested transactions

Returns

boolean

Overrides

DboSource::nestedTransactionSupported()

renderStatement()source public 

renderStatement( string $type , array $data )

Overrides DboSource::renderStatement to handle schema generation with Postgres-style indexes

Parameters

string $type
The query type.
array $data
The array of data to render.

Returns

string

Overrides

DboSource::renderStatement()

resetSequence()source public 

resetSequence( string $table , string $column )

Reset a sequence based on the MAX() value of $column. Useful for resetting sequences after using insertMulti().

Parameters

string $table
The name of the table to update.
string $column

The column to use when resetting the sequence value, the sequence name will be fetched using Postgres::getSequence();

Returns

boolean
success.

Overrides

DboSource::resetSequence()

resultSet()source public 

resultSet( array $results )

resultSet method

Parameters

array $results
$results The results

setEncoding()source public 

setEncoding( mixed $enc )

Sets the database encoding

Parameters

mixed $enc
Database encoding

Returns

boolean
True on success, false on failure

truncate()source public 

truncate( string|Model $table , boolean $reset false )

Deletes all the records in a table and drops all associated auto-increment sequences

Parameters

string|Model $table
A string or model class representing the table to be truncated
boolean $reset optional false

true for resetting the sequence, false to leave it as is. and if 1, sequences are not modified

Returns

boolean
SQL TRUNCATE TABLE statement, false if not applicable.

Overrides

DboSource::truncate()

value()source public 

value( string $data , string $column null , boolean $null true )

Returns a quoted and escaped string of $data for use in an SQL statement.

Parameters

string $data
String to be prepared for use in an SQL statement
string $column optional null
The column datatype into which this data will be inserted.
boolean $null optional true
Column allows NULL values

Returns

string
Quoted and escaped data

Overrides

DboSource::value()

Methods inherited from DboSource

__construct()source public 

__construct( array $config null , boolean $autoConnect true )

Constructor

Parameters

array $config optional null
Array of configuration information for the Datasource.
boolean $autoConnect optional true
Whether or not the datasource should automatically connect.

Throws

MissingConnectionException
when a connection cannot be made.

Overrides

DataSource::__construct()

__destruct()source public 

__destruct( )

Used for storing in cache the results of the in-memory methodCache

Overrides

DataSource::__destruct()

_beginNested()source protected 

_beginNested( )

Begin a nested transaction

Returns

boolean

_buildFieldParameters()source protected 

_buildFieldParameters( string $columnString , array $columnData , string $position )

Build the field parameters, in a position

Parameters

string $columnString
The partially built column string
array $columnData
The array of column data.
string $position
The position type to use. 'beforeDefault' or 'afterDefault' are common

Returns

string
a built column with the field parameters added.

_commitNested()source protected 

_commitNested( )

Commit a nested transaction

Returns

boolean

_constructVirtualFields()source protected 

_constructVirtualFields( Model $Model , string $alias , array $fields )

Converts model virtual fields into sql expressions to be fetched later

Parameters

Model $Model
The model to get virtual fields for.
string $alias
Alias table name
array $fields
virtual fields to be used on query

Returns

array

_dropTable()source protected 

_dropTable( type $table )

Generate a "drop table" statement for a single table

Parameters

type $table
Name of the table to drop

Returns

string
Drop table SQL statement

_execute()source protected 

_execute( string $sql , array $params array() , array $prepareOptions array() )

Executes given SQL statement.

Parameters

string $sql
SQL statement
array $params optional array()
list of params to be bound to query
array $prepareOptions optional array()
Options to be used in the prepare statement

Returns

mixed

PDOStatement if query executes with no problem, true as the result of a successful, false on error query returning no rows, such as a CREATE statement, false otherwise


Throws

PDOException

_fetchHasAndBelongsToMany()source protected 

_fetchHasAndBelongsToMany( Model $Model , string $query , array $ids , string $association )

Fetch 'hasAndBelongsToMany' associations.

Parameters

Model $Model
Primary model object.
string $query
Association query.
array $ids
Array of IDs of associated records.
string $association
Association name.

Returns

array
Association results.

_fetchHasMany()source protected 

_fetchHasMany( Model $Model , string $query , array $ids )

Fetch 'hasMany' associations.

Parameters

Model $Model
Primary model object.
string $query
Association query template.
array $ids
Array of IDs of associated records.

Returns

array
Association results.

_filterResults()source protected 

_filterResults( array $resultSet , Model $Model , array $filtered array() )

Passes association results through afterFind filters of the corresponding model.

The primary model is always excluded, because the filtering is later done by Model::_filterResults().

Parameters

array $resultSet
$resultSet Reference of resultset to be filtered.
Model $Model
Instance of model to operate against.
array $filtered optional array()
List of classes already filtered, to be skipped.

Returns

array
Array of results that have been filtered through $Model->afterFind.

_filterResultsInclusive()source protected 

_filterResultsInclusive( array $resultSet , Model $Model , array $toBeFiltered array() )

Passes association results through afterFind filters of the corresponding model.

Similar to DboSource::_filterResults(), but this filters only specified models. The primary model can not be specified, because this call DboSource::_filterResults() internally.

Parameters

array $resultSet
$resultSet Reference of resultset to be filtered.
Model $Model
Instance of model to operate against.
array $toBeFiltered optional array()
List of classes to be filtered.

Returns

array
Array of results that have been filtered through $Model->afterFind.

_getJoins()source protected 

_getJoins( Model $Model )

Returns an array of SQL JOIN conditions from a model's associations.

Parameters

Model $Model
The model to get joins for.2

Returns

array

_matchRecords()source protected 

_matchRecords( Model $Model , mixed $conditions null )

Gets a list of record IDs for the given conditions. Used for multi-record updates and deletes in databases that do not support aliases in UPDATE/DELETE queries.

Parameters

Model $Model
The model to find matching records for.
mixed $conditions optional null
The conditions to match against.

Returns

array
List of record IDs

_mergeAssociation()source protected 

_mergeAssociation( array $data , array $merge , string $association , string $type , boolean $selfJoin false )

Merge association of merge into data

Parameters

array $data
$data The data to merge.
array $merge
$merge The data to merge.
string $association
The association name to merge.
string $type
The type of association
boolean $selfJoin optional false
Whether or not this is a self join.

_mergeConditions()source protected 

_mergeConditions( mixed $query , mixed $assoc )

Merges a mixed set of string/array conditions.

Parameters

mixed $query
The query to merge conditions for.
mixed $assoc
The association names.

Returns

array

_mergeHasMany()source protected 

_mergeHasMany( array $resultSet , array $assocResultSet , string $association , Model $Model )

Merge the results of 'hasMany' associations.

Note: this function also deals with the formatting of the data.

Parameters

array $resultSet
$resultSet Data to merge into.
array $assocResultSet
Data to merge.
string $association
Name of Model being merged.
Model $Model
Model being merged onto.

_parseKey()source protected 

_parseKey( string $key , mixed $value , Model $Model null )

Extracts a Model.field identifier and an SQL condition operator from a string, formats and inserts values, and composes them into an SQL snippet.

Parameters

string $key
An SQL key snippet containing a field and optional SQL operator
mixed $value
The value(s) to be inserted in the string
Model $Model optional null
Model object initiating the query

Returns

string

_prepareUpdateFields()source protected 

_prepareUpdateFields( Model $Model , array $fields , boolean $quoteValues true , boolean $alias false )

Quotes and prepares fields and values for an SQL UPDATE statement

Parameters

Model $Model
The model to prepare fields for.
array $fields
The fields to update.
boolean $quoteValues optional true
If values should be quoted, or treated as SQL snippets
boolean $alias optional false
Include the model alias in the field name

Returns

array
Fields and values, quoted and prepared

_quoteFields()source protected 

_quoteFields( string $conditions )

Quotes Model.fields

Parameters

string $conditions
The conditions to quote.

Returns

string
or false if no match

_quoteMatchedField()source protected 

_quoteMatchedField( string $match )

Auxiliary function to quote matches Model.fields from a preg_replace_callback call

Parameters

string $match
matched string

Returns

string
quoted string

_rollbackNested()source protected 

_rollbackNested( )

Rollback a nested transaction

Returns

boolean

_scrubQueryData()source protected 

_scrubQueryData( array $data )

Private helper method to remove query metadata in given data array.

Parameters

array $data
The data to scrub.

Returns

array

_writeQueryCache()source protected 

_writeQueryCache( string $sql , mixed $data , array $params array() )

Writes a new key for the in memory sql query cache

Parameters

string $sql
SQL query
mixed $data
result of $sql query
array $params optional array()
query params bound as values

begin()source public 

begin( )

Begin a transaction

Returns

boolean

True on success, false on fail (i.e. if the database/model does not support transactions, or a transaction has not started).


Overrides

DataSource::begin()

buildAssociationQuery()source public 

buildAssociationQuery( Model $Model , array $queryData )

Builds an SQL statement.

This is merely a convenient wrapper to DboSource::buildStatement().

Parameters

Model $Model
The model to build an association query for.
array $queryData
An array of queryData information containing keys similar to Model::find().

Returns

string
String containing an SQL statement.

See

DboSource::buildStatement()

buildJoinStatement()source public 

buildJoinStatement( array $join )

Builds and generates a JOIN condition from an array. Handles final clean-up before conversion.

Parameters

array $join
An array defining a JOIN condition in a query.

Returns

string
An SQL JOIN condition to be used in a query.

See

DboSource::renderJoinStatement()
DboSource::buildStatement()

buildStatement()source public 

buildStatement( array $query , Model $Model )

Builds and generates an SQL statement from an array. Handles final clean-up before conversion.

Parameters

array $query
An array defining an SQL query.
Model $Model
The model object which initiated the query.

Returns

string
An executable SQL statement.

See

DboSource::renderStatement()

buildTableParameters()source public 

buildTableParameters( array $parameters , string $table null )

Format parameters for create table

Parameters

array $parameters
The parameters to create SQL for.
string $table optional null
The table name.

Returns

array

cacheMethod()source public 

cacheMethod( string $method , string $key , mixed $value null )

Cache a value into the methodCaches. Will respect the value of DboSource::$cacheMethods. Will retrieve a value from the cache if $value is null.

If caching is disabled and a write is attempted, the $value will be returned. A read will either return the value or null.

Parameters

string $method
Name of the method being cached.
string $key
The key name for the cache operation.
mixed $value optional null
The value to cache into memory.

Returns

mixed
Either null on failure, or the value if its set.

calculate()source public 

calculate( Model $Model , string $func , array $params array() )

Returns an SQL calculation, i.e. COUNT() or MAX()

Parameters

Model $Model
The model to get a calculated field for.
string $func
Lowercase name of SQL function, i.e. 'count' or 'max'
array $params optional array()
Function parameters (any values must be quoted manually)

Returns

string
An SQL calculation function

close()source public 

close( )

Disconnects database, kills the connection and says the connection is closed.

Overrides

DataSource::close()

commit()source public 

commit( )

Commit a transaction

Returns

boolean

True on success, false on fail (i.e. if the database/model does not support transactions, or a transaction has not started).


Overrides

DataSource::commit()

conditionKeysToString()source public 

conditionKeysToString( array $conditions , boolean $quoteValues true , Model $Model null )

Creates a WHERE clause by parsing given conditions array. Used by DboSource::conditions().

Parameters

array $conditions
Array or string of conditions
boolean $quoteValues optional true
If true, values should be quoted
Model $Model optional null
A reference to the Model instance making the query

Returns

string
SQL fragment

conditions()source public 

conditions( mixed $conditions , boolean $quoteValues true , boolean $where true , Model $Model null )

Creates a WHERE clause by parsing given conditions data. If an array or string conditions are provided those conditions will be parsed and quoted. If a boolean is given it will be integer cast as condition. Null will return 1 = 1.

Results of this method are stored in a memory cache. This improves performance, but because the method uses a hashing algorithm it can have collisions. Setting DboSource::$cacheMethods to false will disable the memory cache.

Parameters

mixed $conditions
Array or string of conditions, or any value.
boolean $quoteValues optional true
If true, values should be quoted
boolean $where optional true
If true, "WHERE " will be prepended to the return value
Model $Model optional null
A reference to the Model instance making the query

Returns

string
SQL fragment

create()source public 

create( Model $Model , array $fields null , array $values null )

The "C" in CRUD

Creates new records in the database.

Parameters

Model $Model
Model object that the record is for.
array $fields optional null

An array of field names to insert. If null, $Model->data will be used to generate field names.

array $values optional null

An array of values with keys matching the fields. If null, $Model->data will be used to generate values.

Returns

boolean
Success

Overrides

DataSource::create()

createSchema()source public 

createSchema( CakeSchema $schema , string $tableName null )

Generate a database-native schema for the given Schema object

Parameters

CakeSchema $schema
An instance of a subclass of CakeSchema
string $tableName optional null

Optional. If specified only the table name given will be generated. Otherwise, all tables defined in the schema are generated.

Returns

string

defaultConditions()source public 

defaultConditions( Model $Model , string|array|boolean $conditions , boolean $useAlias true )

Creates a default set of conditions from the model if $conditions is null/empty. If conditions are supplied then they will be returned. If a model doesn't exist and no conditions were provided either null or false will be returned based on what was input.

Parameters

Model $Model
The model to get conditions for.
string|array|boolean $conditions

Array of conditions, conditions string, null or false. If an array of conditions, or string conditions those conditions will be returned. With other values the model's existence will be checked. If the model doesn't exist a null or false will be returned depending on the input value.

boolean $useAlias optional true
Use model aliases rather than table names when generating conditions

Returns

mixed
Either null, false, $conditions or an array of default conditions to use.

See

DboSource::update()
DboSource::conditions()

delete()source public 

delete( Model $Model , mixed $conditions null )

Generates and executes an SQL DELETE statement. For databases that do not support aliases in UPDATE queries.

Parameters

Model $Model
The model to delete from
mixed $conditions optional null
The conditions to use. If empty the model's primary key will be used.

Returns

boolean
Success

Overrides

DataSource::delete()

disconnect()source public 

disconnect( )

Disconnects from database.

Returns

boolean
Always true

dropSchema()source public 

dropSchema( CakeSchema $schema , string $table null )

Generate a "drop table" statement for the given Schema object

Parameters

CakeSchema $schema
An instance of a subclass of CakeSchema
string $table optional null

Optional. If specified only the table name given will be generated. Otherwise, all tables defined in the schema are generated.

Returns

string

execute()source public 

execute( string $sql , array $options array() , array $params array() )

Queries the database with given SQL statement, and obtains some metadata about the result (rows affected, timing, any errors, number of rows in resultset). The query is also logged. If Configure::read('debug') is set, the log is shown all the time, else it is only shown on errors.

Options

  • log - Whether or not the query should be logged to the memory log.

Parameters

string $sql
SQL statement
array $options optional array()
The options for executing the query.
array $params optional array()
values to be bound to the query.

Returns

mixed
Resource or object representing the result set, or false on failure

expression()source public 

expression( string $expression )

Returns an object to represent a database expression in a query. Expression objects are not sanitized or escaped.

Parameters

string $expression
An arbitrary SQL expression to be inserted into a query.

Returns

stdClass
An object representing a database expression to be used in a query

fetchAll()source public 

fetchAll( string $sql , array|boolean $params array() , array $options array() )

Returns an array of all result rows for a given SQL query.

Returns false if no rows matched.

Options

  • cache - Returns the cached version of the query, if exists and stores the result in cache. This is a non-persistent cache, and only lasts for a single request. This option defaults to true. If you are directly calling this method, you can disable caching by setting $options to false

Parameters

string $sql
SQL statement
array|boolean $params optional array()

Either parameters to be bound as values for the SQL statement, or a boolean to control query caching.

array $options optional array()
additional options for the query.

Returns

boolean|array
Array of resultset rows, or false if no rows matched

fetchAssociated()source public 

fetchAssociated( Model $Model , string $query , array $ids )

Fetch 'hasMany' associations.

This is just a proxy to maintain BC.

Parameters

Model $Model
Primary model object.
string $query
Association query template.
array $ids
Array of IDs of associated records.

Returns

array
Association results.

See

DboSource::_fetchHasMany()

fetchRow()source public 

fetchRow( string $sql null )

Returns a row from current resultset as an array

Parameters

string $sql optional null
Some SQL to be executed.

Returns

array
The fetched row as an array

fetchVirtualField()source public 

fetchVirtualField( array $result )

Modifies $result array to place virtual fields in model entry where they belongs to

Parameters

array $result
$result Reference to the fetched row

field()source public 

field( string $name , string $sql )

Returns a single field of the first of query results for a given SQL query, or false if empty.

Parameters

string $name
The name of the field to get.
string $sql
The SQL query.

Returns

mixed
Value of field read, or false if not found.

flushMethodCache()source public 

flushMethodCache( )

Empties the method caches. These caches are used by DboSource::name() and DboSource::conditions()

fullTableName()source public 

fullTableName( Model|string $model , boolean $quote true , boolean $schema true )

Gets full table name including prefix

Parameters

Model|string $model
Either a Model object or a string table name.
boolean $quote optional true
Whether you want the table name quoted.
boolean $schema optional true
Whether you want the schema name included.

Returns

string
Full quoted table name

generateAssociationQuery()source public 

generateAssociationQuery( Model $Model , Model|null $LinkModel , string $type , string $association , array $assocData , array $queryData , boolean $external )

Generates a query or part of a query from a single model or two associated models.

Builds a string containing an SQL statement template.

Parameters

Model $Model
Primary Model object.
Model|null $LinkModel
Linked model object.
string $type
Association type, one of the model association types ie. hasMany.
string $association
Association name.
array $assocData
Association data.
array $queryData
$queryData An array of queryData information containing keys similar to Model::find().
boolean $external
Whether or not the association query is on an external datasource.

Returns

mixed

String representing a query. True, when $external is false and association $type is 'hasOne' or 'belongsTo'.


getConnection()source public 

getConnection( )

Get the underlying connection object.

Returns

PDO

getConstraint()source public 

getConstraint( string $type , Model $Model , Model $LinkModel , string $association , array $assocData , string $association2 null )

Returns a conditions array for the constraint between two models.

Parameters

string $type
Association type.
Model $Model
Primary Model object.
Model $LinkModel
Linked model object.
string $association
Association name.
array $assocData
Association data.
string $association2 optional null
HABTM association name.

Returns

array
Conditions array defining the constraint between $Model and $LinkModel.

getLog()source public 

getLog( boolean $sorted false , boolean $clear true )

Get the query log as an array.

Parameters

boolean $sorted optional false
Get the queries sorted by time taken, defaults to false.
boolean $clear optional true
If True the existing log will cleared.

Returns

array
Array of queries run as an array

getQueryCache()source public 

getQueryCache( string $sql , array $params array() )

Returns the result for a sql query if it is already cached

Parameters

string $sql
SQL query
array $params optional array()
query params bound as values

Returns

mixed
results for query if it is cached, false otherwise

getVersion()source public 

getVersion( )

Gets the version string of the database server

Returns

string
The database version

group()source public 

group( string|array $fields , Model $Model null )

Create a GROUP BY SQL clause.

Parameters

string|array $fields
Group By fields
Model $Model optional null
The model to get group by fields for.

Returns

string
Group By clause or null.

hasAny()source public 

hasAny( Model $Model , string $sql )

Checks if the specified table contains any record matching specified SQL

Parameters

Model $Model
Model to search
string $sql
SQL WHERE clause (condition only, not the "WHERE" part)

Returns

boolean
True if the table has a matching record, else false

hasResult()source public 

hasResult( )

Checks if the result is valid

Returns

boolean
True if the result is valid else false

identifier()source public 

identifier( string $identifier )

Returns an object to represent a database identifier in a query. Expression objects are not sanitized or escaped.

Parameters

string $identifier
A SQL expression to be used as an identifier

Returns

stdClass
An object representing a database identifier to be used in a query

insertMulti()source public 

insertMulti( string $table , array $fields , array $values )

Inserts multiple values into a table

Parameters

string $table
The table being inserted into.
array $fields
The array of field/column names being inserted.
array $values

The array of values to insert. The values should be an array of rows. Each row should have values keyed by the column name. Each row must have the values in the same order as $fields.

Returns

boolean

introspectType()source public 

introspectType( string $value )

Guesses the data type of an array

Parameters

string $value
The value to introspect for type data.

Returns

string

isConnected()source public 

isConnected( )

Checks if the source is connected to the database.

Returns

boolean
True if the database is connected, else false

lastAffected()source public 

lastAffected( mixed $source null )

Returns number of affected rows in previous database operation. If no previous operation exists, this returns false.

Parameters

mixed $source optional null
The source to check.

Returns

integer
Number of affected rows

Overrides

DataSource::lastAffected()

lastError()source public 

lastError( PDOStatement $query null )

Returns a formatted error message from previous database operation.

Parameters

PDOStatement $query optional null
the query to extract the error from if any

Returns

string
Error message with error number

lastNumRows()source public 

lastNumRows( mixed $source null )

Returns number of rows in previous resultset. If no previous resultset exists, this returns false.

Parameters

mixed $source optional null
Not used

Returns

integer
Number of rows in resultset

Overrides

DataSource::lastNumRows()

logQuery()source public 

logQuery( string $sql , array $params array() )

Log given SQL query.

Parameters

string $sql
SQL statement
array $params optional array()
Values binded to the query (prepared statements)

order()source public 

order( array|string $keys , string $direction 'ASC' , Model $Model null )

Returns an ORDER BY clause as a string.

Parameters

array|string $keys
Field reference, as a key (i.e. Post.title)
string $direction optional 'ASC'
Direction (ASC or DESC)
Model $Model optional null
Model reference (used to look for virtual field)

Returns

string
ORDER BY clause

prepareFields()source public 

prepareFields( Model $Model , array $queryData )

Prepares fields required by an SQL statement.

When no fields are set, all the $Model fields are returned.

Parameters

Model $Model
The model to prepare.
array $queryData
An array of queryData information containing keys similar to Model::find().

Returns

array
Array containing SQL fields.

query()source public 

query( )

DataSource Query abstraction

Returns

resource
Result resource identifier.

queryAssociation()source public 

queryAssociation( Model $Model , Model $LinkModel , string $type , string $association , array $assocData , array $queryData , boolean $external , array $resultSet , integer $recursive , array $stack )

Queries associations.

Used to fetch results on recursive models.

  • 'hasMany' associations with no limit set: Fetch, filter and merge is done recursively for every level.

  • 'hasAndBelongsToMany' associations: Fetch and filter is done unaffected by the (recursive) level set.

Parameters

Model $Model
Primary Model object.
Model $LinkModel
Linked model object.
string $type
Association type, one of the model association types ie. hasMany.
string $association
Association name.
array $assocData
Association data.
array $queryData
$queryData An array of queryData information containing keys similar to Model::find().
boolean $external
Whether or not the association query is on an external datasource.
array $resultSet
$resultSet Existing results.
integer $recursive
Number of levels of association.
array $stack
A list with joined models.

Returns

mixed

Throws

CakeException
when results cannot be created.

rawQuery()source public 

rawQuery( string $sql , array $params array() )

Executes given SQL statement.

Parameters

string $sql
SQL statement
array $params optional array()
Additional options for the query.

Returns

mixed
Resource or object representing the result set, or false on failure

read()source public 

read( Model $Model , array $queryData array() , integer $recursive null )

The "R" in CRUD

Reads record(s) from the database.

Parameters

Model $Model
A Model object that the query is for.
array $queryData optional array()
An array of queryData information containing keys similar to Model::find().
integer $recursive optional null
Number of levels of association

Returns

mixed
boolean false on error/failure. An array of results on success.

Overrides

DataSource::read()

readTableParameters()source public 

readTableParameters( string $name )

Read additional table parameters

Parameters

string $name
The table name to read.

Returns

array

reconnect()source public 

reconnect( array $config array() )

Reconnects to database server with optional new settings

Parameters

array $config optional array()
An array defining the new configuration settings

Returns

boolean
True on success, false on failure

renderJoinStatement()source public 

renderJoinStatement( array $data )

Renders a final SQL JOIN statement

Parameters

array $data
The data to generate a join statement for.

Returns

string

resolveKey()source public 

resolveKey( Model $Model , string $key , string $assoc null )

Returns a key formatted like a string Model.fieldname(i.e. Post.title, or Country.name)

Parameters

Model $Model
The model to get a key for.
string $key
The key field.
string $assoc optional null
The association name.

Returns

string

Overrides

DataSource::resolveKey()

rollback()source public 

rollback( )

Rollback a transaction

Returns

boolean

True on success, false on fail (i.e. if the database/model does not support transactions, or a transaction has not started).


Overrides

DataSource::rollback()

showLog()source public 

showLog( boolean $sorted false )

Outputs the contents of the queries log. If in a non-CLI environment the sql_log element will be rendered and output. If in a CLI environment, a plain text log is generated.

Parameters

boolean $sorted optional false
Get the queries sorted by time taken, defaults to false.

update()source public 

update( Model $Model , array $fields array() , array $values null , mixed $conditions null )

Generates and executes an SQL UPDATE statement for given model, fields, and values. For databases that do not support aliases in UPDATE queries.

Parameters

Model $Model
The model to update.
array $fields optional array()
The fields to update
array $values optional null
The values fo the fields.
mixed $conditions optional null
The conditions for the update. When non-empty $values will not be quoted.

Returns

boolean
Success

Overrides

DataSource::update()

Methods inherited from DataSource

_cacheDescription()source protected 

_cacheDescription( string $object , mixed $data null )

Cache the DataSource description

Parameters

string $object
The name of the object (model) to cache
mixed $data optional null
The description of the model, usually a string or array

Returns

mixed

insertQueryData()source public 

insertQueryData( string $query , array $data , string $association , Model $Model , array $stack )

Replaces {$__cakeID__$} and {$__cakeForeignKey__$} placeholders in query data.

Parameters

string $query
Query string needing replacements done.
array $data
Array of data with values that will be inserted in placeholders.
string $association
Name of association model being replaced.
Model $Model
Model instance.
array $stack
The context stack.

Returns

mixed
String of query data with placeholders replaced, or false on failure.

setConfig()source public 

setConfig( array $config array() )

Sets the configuration for the DataSource. Merges the $config information with the _baseConfig and the existing $config property.

Parameters

array $config optional array()
The configuration array

Methods inherited from Object

_mergeVars()source protected 

_mergeVars( array $properties , string $class , boolean $normalize true )

Merges this objects $property with the property in $class' definition. This classes value for the property will be merged on top of $class'

This provides some of the DRY magic CakePHP provides. If you want to shut it off, redefine this method as an empty function.

Parameters

array $properties
The name of the properties to merge.
string $class
The class to merge the property with.
boolean $normalize optional true
Set to true to run the properties through Hash::normalize() before merging.

_set()source protected 

_set( array $properties array() )

Allows setting of multiple properties of the object in a single line of code. Will only set properties that are part of a class declaration.

Parameters

array $properties optional array()
An associative array containing properties and corresponding values.

_stop()source protected 

_stop( integer|string $status 0 )

Stop execution of the current script. Wraps exit() making testing easier.

Parameters

integer|string $status optional 0
see http://php.net/exit for values

dispatchMethod()source public 

dispatchMethod( string $method , array $params array() )

Calls a method on this object with the given parameters. Provides an OO wrapper for call_user_func_array

Parameters

string $method
Name of the method to call
array $params optional array()
Parameter list to use when calling $method

Returns

mixed
Returns the result of the method call

log()source public 

log( string $msg , integer $type LOG_ERR , null|string|array $scope null )

Convenience method to write a message to CakeLog. See CakeLog::write() for more information on writing to logs.

Parameters

string $msg
Log message
integer $type optional LOG_ERR
Error type constant. Defined in app/Config/core.php.
null|string|array $scope optional null

The scope(s) a log message is being created in. See CakeLog::config() for more information on logging scopes.

Returns

boolean
Success of log write

requestAction()source public 

requestAction( string|array $url , array $extra array() )

Calls a controller's method from any location. Can be used to connect controllers together or tie plugins into a main application. requestAction can be used to return rendered views or fetch the return value from controller actions.

Under the hood this method uses Router::reverse() to convert the $url parameter into a string URL. You should use URL formats that are compatible with Router::reverse()

Passing POST and GET data

POST and GET data can be simulated in requestAction. Use $extra['url'] for GET data. The $extra['data'] parameter allows POST data simulation.

Parameters

string|array $url

String or array-based URL. Unlike other URL arrays in CakePHP, this URL will not automatically handle passed and named arguments in the $url parameter.

array $extra optional array()

if array includes the key "return" it sets the AutoRender to true. Can also be used to submit GET/POST data, and named/passed arguments.

Returns

mixed

Boolean true or false on success/failure, or contents of rendered action if 'return' is set in $extra.


toString()source public 

toString( )

Object-to-string conversion. Each class can override this method as necessary.

Returns

string
The name of this class

Properties detail

$_baseConfigsource

protected array

Base driver configuration settings. Merged with user settings.

array(
    'persistent' => true,
    'host' => 'localhost',
    'login' => 'root',
    'password' => '',
    'database' => 'cake',
    'schema' => 'public',
    'port' => 5432,
    'encoding' => '',
    'sslmode' => 'allow',
    'flags' => array()
)

$_sequenceMapsource

protected array

Contains mappings of custom auto-increment sequences, if a table uses a sequence name other than what is dictated by convention.

array()

$_sqlOpssource

protected array

The set of valid SQL operations usable in a WHERE statement

array('like', 'ilike', 'or', 'not', 'in', 'between', '~', '~\*', '\!~', '\!~\*', 'similar to')

$columnssource

public array

Columns

array(
    'primary_key' => array('name' => 'serial NOT NULL'),
    'string' => array('name' => 'varchar', 'limit' => '255'),
    'text' => array('name' => 'text'),
    'integer' => array('name' => 'integer', 'formatter' => 'intval'),
    'biginteger' => array('name' => 'bigint', 'limit' => '20'),
    'float' => array('name' => 'float', 'formatter' => 'floatval'),
    'decimal' => array('name' => 'decimal', 'formatter' => 'floatval'),
    'datetime' => array('name' => 'timestamp', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'),
    'timestamp' => array('name' => 'timestamp', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'),
    'time' => array('name' => 'time', 'format' => 'H:i:s', 'formatter' => 'date'),
    'date' => array('name' => 'date', 'format' => 'Y-m-d', 'formatter' => 'date'),
    'binary' => array('name' => 'bytea'),
    'boolean' => array('name' => 'boolean'),
    'number' => array('name' => 'numeric'),
    'inet' => array('name' => 'inet'),
    'uuid' => array('name' => 'uuid')
)

$descriptionsource

public string

Driver description

"PostgreSQL DBO Driver"

$endQuotesource

public string

Ending Quote

'"'

$startQuotesource

public string

Starting Quote

'"'

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Licensed under the MIT License.
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We are not endorsed by or affiliated with CakePHP.
http://api.cakephp.org/2.8/class-Postgres.html