Interface SchemaInterface

An interface used by TableSchema objects.

Namespace: Cake\Datasource

Method Summary

  • addColumn() public

    Add a column to the table.

  • baseColumnType() public

    Returns the base type name for the provided column.

  • columns() public

    Get the column names in the table.

  • defaultValues() public

    Get a hash of columns and their default values.

  • getColumn() public

    Get column data in the table.

  • getColumnType() public

    Returns column type or null if a column does not exist.

  • getOptions() public

    Gets the options for a table.

  • hasColumn() public

    Returns true if a column exists in the schema.

  • isNullable() public

    Check whether or not a field is nullable

  • name() public

    Get the name of the table.

  • removeColumn() public

    Remove a column from the table schema.

  • setColumnType() public

    Sets the type of a column.

  • setOptions() public

    Sets the options for a table.

  • typeMap() public

    Returns an array where the keys are the column names in the schema and the values the database type they have.

Method Detail

addColumn() public 

addColumn(string $name, mixed $attrs)

Add a column to the table.

Attributes

Columns can have several attributes:

  • type The type of the column. This should be one of CakePHP's abstract types.
  • length The length of the column.
  • precision The number of decimal places to store for float and decimal types.
  • default The default value of the column.
  • null Whether or not the column can hold nulls.
  • fixed Whether or not the column is a fixed length column. This is only present/valid with string columns.
  • unsigned Whether or not the column is an unsigned column. This is only present/valid for integer, decimal, float columns.

In addition to the above keys, the following keys are implemented in some database dialects, but not all:

  • comment The comment for the column.

Parameters

string $name

The name of the column

string|array $attrs

The attributes for the column or the type name.

Returns

$this

baseColumnType() public 

baseColumnType(string $column)

Returns the base type name for the provided column.

This represent the database type a more complex class is based upon.

Parameters

string $column

The column name to get the base type from

Returns

string|null

The base type name

columns() public 

columns()

Get the column names in the table.

Returns

string[]

defaultValues() public 

defaultValues()

Get a hash of columns and their default values.

Returns

array

getColumn() public 

getColumn(string $name)

Get column data in the table.

Parameters

string $name

The column name.

Returns

array|null

Column data or null.

getColumnType() public 

getColumnType(string $name)

Returns column type or null if a column does not exist.

Parameters

string $name

The column to get the type of.

Returns

string|null

getOptions() public 

getOptions()

Gets the options for a table.

Table options allow you to set platform specific table level options. For example the engine type in MySQL.

Returns

array

An array of options.

hasColumn() public 

hasColumn(string $name)

Returns true if a column exists in the schema.

Parameters

string $name

Column name.

Returns

bool

isNullable() public 

isNullable(string $name)

Check whether or not a field is nullable

Missing columns are nullable.

Parameters

string $name

The column to get the type of.

Returns

bool

Whether or not the field is nullable.

name() public 

name()

Get the name of the table.

Returns

string

removeColumn() public 

removeColumn(string $name)

Remove a column from the table schema.

If the column is not defined in the table, no error will be raised.

Parameters

string $name

The name of the column

Returns

$this

setColumnType() public 

setColumnType(string $name, string $type)

Sets the type of a column.

Parameters

string $name

The column to set the type of.

string $type

The type to set the column to.

Returns

$this

setOptions() public 

setOptions(array $options)

Sets the options for a table.

Table options allow you to set platform specific table level options. For example the engine type in MySQL.

Parameters

array $options

The options to set, or null to read options.

Returns

$this

typeMap() public 

typeMap()

Returns an array where the keys are the column names in the schema and the values the database type they have.

Returns

array

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https://api.cakephp.org/4.0/interface-Cake.Datasource.SchemaInterface.html