Class HasOne

Represents an 1 - 1 relationship where the source side of the relation is related to only one record in the target table and vice versa.

An example of a HasOne association would be User has one Profile.

Cake\ORM\Association uses Cake\Core\ConventionsTrait , Cake\ORM\Locator\LocatorAwareTrait
Extended by Cake\ORM\Association\HasOne

Inherited Constants

Properties summary

Inherited Properties

Method Summary

  • _propertyName() protected
    Returns default property name based on association name.
  • Handles cascading a delete from an associated model.
  • eagerLoader() public

    Eager loads a list of records in the target table that are related to another set of records in the source table. Source records can specified in two ways: first one is by passing a Query object setup to find on the source table and the other way is by explicitly passing an array of primary key values from the source table.

  • Gets the name of the field representing the foreign key to the target table.
  • Returns whether or not the passed table is the owning side for this association. This means that rows in the 'target' table would miss important or required information if the row in 'source' did not exist.

  • Takes an entity from the source table and looks if there is a field matching the property name for this association. The found entity will be saved on the target table for this association by passing supplied $options

  • type() public
    Get the relationship type.

Method Detail

_propertyName()source protected

_propertyName( )

Returns default property name based on association name.

Returns

string

Overrides

Cake\ORM\Association::_propertyName()

cascadeDelete()source public

cascadeDelete( Cake\Datasource\EntityInterface $entity , array $options [] )

Handles cascading a delete from an associated model.

Parameters

Cake\Datasource\EntityInterface $entity
The entity that started the cascaded delete.
array $options optional []
The options for the original delete.

Returns

boolean
Success

eagerLoader()source public

eagerLoader( array $options )

Eager loads a list of records in the target table that are related to another set of records in the source table. Source records can specified in two ways: first one is by passing a Query object setup to find on the source table and the other way is by explicitly passing an array of primary key values from the source table.

Parameters

array $options
The options for eager loading.

Returns

callable

getForeignKey()source public

getForeignKey( )

Gets the name of the field representing the foreign key to the target table.

Returns

string

Overrides

Cake\ORM\Association::getForeignKey()

isOwningSide()source public

isOwningSide( Cake\ORM\Table $side )

Returns whether or not the passed table is the owning side for this association. This means that rows in the 'target' table would miss important or required information if the row in 'source' did not exist.

Parameters

Cake\ORM\Table $side
The potential Table with ownership

Returns

boolean

saveAssociated()source public

saveAssociated( Cake\Datasource\EntityInterface $entity , array $options [] )

Takes an entity from the source table and looks if there is a field matching the property name for this association. The found entity will be saved on the target table for this association by passing supplied $options

Parameters

Cake\Datasource\EntityInterface $entity
an entity from the source table
array $options optional []

options to be passed to the save method in the target table

Returns

boolean|Cake\Datasource\EntityInterface

false if $entity could not be saved, otherwise it returns the saved entity


See

\Cake\ORM\Table::save()

type()source public

type( )

Get the relationship type.

Returns

string

Methods inherited from Cake\ORM\Association

__call()source public

__call( string $method , array $argument )

Proxies method calls to the target table.

Parameters

string $method
name of the method to be invoked
array $argument
List of arguments passed to the function

Returns

mixed

Throws

BadMethodCallException

__construct()source public

__construct( string $alias , array $options [] )

Constructor. Subclasses can override _options function to get the original list of passed options if expecting any other special key

Parameters

string $alias
The name given to the association
array $options optional []
A list of properties to be set on this object

__get()source public

__get( string $property )

Proxies property retrieval to the target table. This is handy for getting this association's associations

Parameters

string $property
the property name

Returns

Cake\ORM\Association

Throws

RuntimeException
if no association with such name exists

__isset()source public

__isset( string $property )

Proxies the isset call to the target table. This is handy to check if the target table has another association with the passed name

Parameters

string $property
the property name

Returns

boolean
true if the property exists

_appendFields()source protected

_appendFields( Cake\ORM\Query $query , Cake\ORM\Query $surrogate , array $options )

Helper function used to conditionally append fields to the select clause of a query from the fields found in another query object.

Parameters

Cake\ORM\Query $query
the query that will get the fields appended to
Cake\ORM\Query $surrogate
the query having the fields to be copied from
array $options
options passed to the method attachTo

_appendNotMatching()source protected

_appendNotMatching( Cake\Datasource\QueryInterface $query , array $options )

Conditionally adds a condition to the passed Query that will make it find records where there is no match with this association.

Parameters

Cake\Datasource\QueryInterface $query
The query to modify
array $options
Options array containing the negateMatch key.

_bindNewAssociations()source protected

_bindNewAssociations( Cake\ORM\Query $query , Cake\ORM\Query $surrogate , array $options )

Applies all attachable associations to $query out of the containments found in the $surrogate query.

Copies all contained associations from the $surrogate query into the passed $query. Containments are altered so that they respect the associations chain from which they originated.

Parameters

Cake\ORM\Query $query
the query that will get the associations attached to
Cake\ORM\Query $surrogate
the query having the containments to be attached
array $options
options passed to the method attachTo

_dispatchBeforeFind()source protected

_dispatchBeforeFind( Cake\ORM\Query $query )

Triggers beforeFind on the target table for the query this association is attaching to

Parameters

Cake\ORM\Query $query
the query this association is attaching itself to

_extractFinder()source protected

_extractFinder( string|array $finderData )

Helper method to infer the requested finder and its options.

Returns the inferred options from the finder $type.

Examples:

The following will call the finder 'translations' with the value of the finder as its options: $query->contain(['Comments' => ['finder' => ['translations']]]); $query->contain(['Comments' => ['finder' => ['translations' => []]]]); $query->contain(['Comments' => ['finder' => ['translations' => ['locales' => ['en_US']]]]]);

Parameters

string|array $finderData

The finder name or an array having the name as key and options as value.

Returns

array

_formatAssociationResults()source protected

_formatAssociationResults( Cake\ORM\Query $query , Cake\ORM\Query $surrogate , array $options )

Adds a formatter function to the passed $query if the $surrogate query declares any other formatter. Since the $surrogate query correspond to the associated target table, the resulting formatter will be the result of applying the surrogate formatters to only the property corresponding to such table.

Parameters

Cake\ORM\Query $query
the query that will get the formatter applied to
Cake\ORM\Query $surrogate

the query having formatters for the associated target table.

array $options
options passed to the method attachTo

_getClassName()source protected

_getClassName( string $alias , array $options [] )

Gets the table class name.

Parameters

string $alias
The alias name you want to get.
array $options optional []
Table options array.

Returns

string

_joinCondition()source protected

_joinCondition( array $options )

Returns a single or multiple conditions to be appended to the generated join clause for getting the results on the target table.

Parameters

array $options
list of options passed to attachTo method

Returns

array

Throws

RuntimeException

if the number of columns in the foreignKey do not match the number of columns in the source table primaryKey


_options()source protected

_options( array $options )

Override this function to initialize any concrete association class, it will get passed the original list of options used in the constructor

Parameters

array $options
List of options used for initialization

attachTo()source public

attachTo( Cake\ORM\Query $query , array $options [] )

Alters a Query object to include the associated target table data in the final result

The options array accept the following keys:

  • includeFields: Whether to include target model fields in the result or not
  • foreignKey: The name of the field to use as foreign key, if false none will be used
  • conditions: array with a list of conditions to filter the join with, this will be merged with any conditions originally configured for this association
  • fields: a list of fields in the target table to include in the result
  • type: The type of join to be used (e.g. INNER) the records found on this association
  • aliasPath: A dot separated string representing the path of association names followed from the passed query main table to this association.
  • propertyPath: A dot separated string representing the path of association properties to be followed from the passed query main entity to this association
  • joinType: The SQL join type to use in the query.
  • negateMatch: Will append a condition to the passed query for excluding matches. with this association.

Parameters

Cake\ORM\Query $query
the query to be altered to include the target table data
array $options optional []
Any extra options or overrides to be taken in account

Throws

RuntimeException

if the query builder passed does not return a query object


bindingKey()source public

bindingKey( string|null $key null )

Sets the name of the field representing the binding field with the target table. When not manually specified the primary key of the owning side table is used.

If no parameters are passed the current field is returned

Deprecated

3.4.0 Use setBindingKey()/getBindingKey() instead.

Parameters

string|null $key optional null
the table field to be used to link both tables together

Returns

string|array

canBeJoined()source public

canBeJoined( array $options [] )

Whether this association can be expressed directly in a query join

Parameters

array $options optional []
custom options key that could alter the return value

Returns

boolean

cascadeCallbacks()source public

cascadeCallbacks( boolean|null $cascadeCallbacks null )

Sets whether or not cascaded deletes should also fire callbacks. If no arguments are passed, the current configured value is returned

Deprecated

3.4.0 Use setCascadeCallbacks()/getCascadeCallbacks() instead.

Parameters

boolean|null $cascadeCallbacks optional null
cascade callbacks switch value

Returns

boolean

className()source public

className( )

The class name of the target table object

Returns

string

conditions()source public

conditions( array|null $conditions null )

Sets a list of conditions to be always included when fetching records from the target association. If no parameters are passed the current list is returned

Deprecated

3.4.0 Use setConditions()/getConditions() instead.

Parameters

array|null $conditions optional null
list of conditions to be used

Returns

array

See

\Cake\Database\Query::where() for examples on the format of the array

defaultRowValue()source public

defaultRowValue( array $row , boolean $joined )

Returns a modified row after appending a property for this association with the default empty value according to whether the association was joined or fetched externally.

Parameters

array $row
The row to set a default on.
boolean $joined

Whether or not the row is a result of a direct join with this association

Returns

array

deleteAll()source public

deleteAll( mixed $conditions )

Proxies the delete operation to the target table's deleteAll method

Parameters

mixed $conditions

Conditions to be used, accepts anything Query::where() can take.

Returns

integer
Returns the number of affected rows.

See

\Cake\ORM\Table::deleteAll()

dependent()source public

dependent( boolean|null $dependent null )

Sets whether the records on the target table are dependent on the source table.

This is primarily used to indicate that records should be removed if the owning record in the source table is deleted.

If no parameters are passed the current setting is returned.

Deprecated

3.4.0 Use setDependent()/getDependent() instead.

Parameters

boolean|null $dependent optional null
Set the dependent mode. Use null to read the current state.

Returns

boolean

exists()source public

exists( array|callable|Cake\Database\ExpressionInterface $conditions )

Proxies the operation to the target table's exists method after appending the default conditions for this association

Parameters

array|callable|Cake\Database\ExpressionInterface $conditions

The conditions to use for checking if any record matches.

Returns

boolean

See

\Cake\ORM\Table::exists()

find()source public

find( string|array|null $type null , array $options [] )

Proxies the finding operation to the target table's find method and modifies the query accordingly based of this association configuration

Parameters

string|array|null $type optional null

the type of query to perform, if an array is passed, it will be interpreted as the $options parameter

array $options optional []
The options to for the find

Returns

Cake\ORM\Query

See

\Cake\ORM\Table::find()

finder()source public

finder( string|null $finder null )

Sets the default finder to use for fetching rows from the target table. If no parameters are passed, it will return the currently configured finder name.

Deprecated

3.4.0 Use setFinder()/getFinder() instead.

Parameters

string|null $finder optional null
the finder name to use

Returns

string

foreignKey()source public

foreignKey( string|null $key null )

Sets the name of the field representing the foreign key to the target table. If no parameters are passed the current field is returned

Deprecated

3.4.0 Use setForeignKey()/getForeignKey() instead.

Parameters

string|null $key optional null
the key to be used to link both tables together

Returns

string|array

getBindingKey()source public

getBindingKey( )

Gets the name of the field representing the binding field with the target table. When not manually specified the primary key of the owning side table is used.

Returns

string|array

getCascadeCallbacks()source public

getCascadeCallbacks( )

Gets whether or not cascaded deletes should also fire callbacks.

Returns

boolean

getConditions()source public

getConditions( )

Gets a list of conditions to be always included when fetching records from the target association.

Returns

array

See

\Cake\Database\Query::where() for examples on the format of the array

getDependent()source public

getDependent( )

Sets whether the records on the target table are dependent on the source table.

This is primarily used to indicate that records should be removed if the owning record in the source table is deleted.

Returns

boolean

getFinder()source public

getFinder( )

Gets the default finder to use for fetching rows from the target table.

Returns

string

getJoinType()source public

getJoinType( )

Gets the type of join to be used when adding the association to a query.

Returns

string

getName()source public

getName( )

Gets the name for this association, usually the alias assigned to the target associated table

Returns

string

getProperty()source public

getProperty( )

Gets the property name that should be filled with data from the target table in the source table record.

Returns

string

getSource()source public

getSource( )

Gets the table instance for the source side of the association.

Returns

Cake\ORM\Table

getStrategy()source public

getStrategy( )

Gets the strategy name to be used to fetch associated records. Keep in mind that some association types might not implement but a default strategy, rendering any changes to this setting void.

Returns

string

getTarget()source public

getTarget( )

Gets the table instance for the target side of the association.

Returns

Cake\ORM\Table

joinType()source public

joinType( string|null $type null )

Sets the type of join to be used when adding the association to a query. If no arguments are passed, the currently configured type is returned.

Deprecated

3.4.0 Use setJoinType()/getJoinType() instead.

Parameters

string|null $type optional null
the join type to be used (e.g. INNER)

Returns

string

name()source public

name( string|null $name null )

Sets the name for this association.

Deprecated

3.4.0 Use setName()/getName() instead.

Parameters

string|null $name optional null
Name to be assigned

Returns

string

property()source public

property( string|null $name null )

Sets the property name that should be filled with data from the target table in the source table record. If no arguments are passed, the currently configured type is returned.

Deprecated

3.4.0 Use setProperty()/getProperty() instead.

Parameters

string|null $name optional null
The name of the association property. Use null to read the current value.

Returns

string

requiresKeys()source public

requiresKeys( array $options [] )

Returns true if the eager loading process will require a set of the owning table's binding keys in order to use them as a filter in the finder query.

Parameters

array $options optional []
The options containing the strategy to be used.

Returns

boolean
true if a list of keys will be required

setBindingKey()source public

setBindingKey( string|array $key )

Sets the name of the field representing the binding field with the target table. When not manually specified the primary key of the owning side table is used.

Parameters

string|array $key
the table field or fields to be used to link both tables together

Returns


$this

setCascadeCallbacks()source public

setCascadeCallbacks( boolean $cascadeCallbacks )

Sets whether or not cascaded deletes should also fire callbacks.

Parameters

boolean $cascadeCallbacks
cascade callbacks switch value

Returns


$this

setConditions()source public

setConditions( array $conditions )

Sets a list of conditions to be always included when fetching records from the target association.

Parameters

array $conditions
list of conditions to be used

Returns


$this

See

\Cake\Database\Query::where() for examples on the format of the array

setDependent()source public

setDependent( boolean $dependent )

Sets whether the records on the target table are dependent on the source table.

This is primarily used to indicate that records should be removed if the owning record in the source table is deleted.

If no parameters are passed the current setting is returned.

Parameters

boolean $dependent
Set the dependent mode. Use null to read the current state.

Returns


$this

setFinder()source public

setFinder( string $finder )

Sets the default finder to use for fetching rows from the target table.

Parameters

string $finder
the finder name to use

Returns


$this

setForeignKey()source public

setForeignKey( string|array $key )

Sets the name of the field representing the foreign key to the target table.

Parameters

string|array $key
the key or keys to be used to link both tables together

Returns


$this

setJoinType()source public

setJoinType( string $type )

Sets the type of join to be used when adding the association to a query.

Parameters

string $type
the join type to be used (e.g. INNER)

Returns


$this

setName()source public

setName( string $name )

Sets the name for this association, usually the alias assigned to the target associated table

Parameters

string $name
Name to be assigned

Returns


$this

setProperty()source public

setProperty( string $name )

Sets the property name that should be filled with data from the target table in the source table record.

Parameters

string $name
The name of the association property. Use null to read the current value.

Returns


$this

setSource()source public

setSource( Cake\ORM\Table $table )

Sets the table instance for the source side of the association.

Parameters

Cake\ORM\Table $table
the instance to be assigned as source side

Returns


$this

setStrategy()source public

setStrategy( string $name )

Sets the strategy name to be used to fetch associated records. Keep in mind that some association types might not implement but a default strategy, rendering any changes to this setting void.

Parameters

string $name
The strategy type. Use null to read the current value.

Returns


$this

Throws

InvalidArgumentException
When an invalid strategy is provided.

setTarget()source public

setTarget( Cake\ORM\Table $table )

Sets the table instance for the target side of the association.

Parameters

Cake\ORM\Table $table
the instance to be assigned as target side

Returns


$this

source()source public

source( Cake\ORM\Table $table null )

Sets the table instance for the source side of the association. If no arguments are passed, the current configured table instance is returned

Deprecated

3.4.0 Use setSource()/getSource() instead.

Parameters

Cake\ORM\Table $table optional null
the instance to be assigned as source side

Returns

Cake\ORM\Table

strategy()source public

strategy( string|null $name null )

Sets the strategy name to be used to fetch associated records. Keep in mind that some association types might not implement but a default strategy, rendering any changes to this setting void. If no arguments are passed, the currently configured strategy is returned.

Deprecated

3.4.0 Use setStrategy()/getStrategy() instead.

Parameters

string|null $name optional null
The strategy type. Use null to read the current value.

Returns

string

Throws

InvalidArgumentException
When an invalid strategy is provided.

target()source public

target( Cake\ORM\Table $table null )

Sets the table instance for the target side of the association. If no arguments are passed, the current configured table instance is returned

Deprecated

3.4.0 Use setTarget()/getTarget() instead.

Parameters

Cake\ORM\Table $table optional null
the instance to be assigned as target side

Returns

Cake\ORM\Table

transformRow()source public

transformRow( array $row , string $nestKey , boolean $joined , string|null $targetProperty null )

Correctly nests a result row associated values into the correct array keys inside the source results.

Parameters

array $row
The row to transform
string $nestKey

The array key under which the results for this association should be found

boolean $joined

Whether or not the row is a result of a direct join with this association

string|null $targetProperty optional null

The property name in the source results where the association data shuld be nested in. Will use the default one if not provided.

Returns

array

updateAll()source public

updateAll( array $fields , mixed $conditions )

Proxies the update operation to the target table's updateAll method

Parameters

array $fields
A hash of field => new value.
mixed $conditions

Conditions to be used, accepts anything Query::where() can take.

Returns

boolean
Success Returns true if one or more rows are affected.

See

\Cake\ORM\Table::updateAll()

Methods used from Cake\Core\ConventionsTrait

_camelize()source protected

_camelize( string $name )

Creates a camelized version of $name

Parameters

string $name
name

Returns

string
Camelized name

_entityName()source protected

_entityName( string $name )

Creates the proper entity name (singular) for the specified name

Parameters

string $name
Name

Returns

string
Camelized and plural model name

_fixtureName()source protected

_fixtureName( string $name )

Creates a fixture name

Parameters

string $name
Model class name

Returns

string
Singular model key

_modelKey()source protected

_modelKey( string $name )

Creates the proper underscored model key for associations

If the input contains a dot, assume that the right side is the real table name.

Parameters

string $name
Model class name

Returns

string
Singular model key

_modelNameFromKey()source protected

_modelNameFromKey( string $key )

Creates the proper model name from a foreign key

Parameters

string $key
Foreign key

Returns

string
Model name

_pluginNamespace()source protected

_pluginNamespace( string $pluginName )

Return plugin's namespace

Parameters

string $pluginName
Plugin name

Returns

string
Plugin's namespace

_pluginPath()source protected

_pluginPath( string $pluginName )

Find the correct path for a plugin. Scans $pluginPaths for the plugin you want.

Parameters

string $pluginName
Name of the plugin you want ie. DebugKit

Returns

string
path path to the correct plugin.

_pluralHumanName()source protected

_pluralHumanName( string $name )

Creates the plural human name used in views

Parameters

string $name
Controller name

Returns

string
Plural human name

_singularHumanName()source protected

_singularHumanName( string $name )

Creates the singular human name used in views

Parameters

string $name
Controller name

Returns

string
Singular human name

_singularName()source protected

_singularName( string $name )

Creates the singular name for use in views.

Parameters

string $name
Name to use

Returns

string
Variable name

_variableName()source protected

_variableName( string $name )

Creates the plural variable name for views

Parameters

string $name
Name to use

Returns

string
Plural name for views

Methods used from Cake\ORM\Locator\LocatorAwareTrait

getTableLocator()source public

getTableLocator( )

Gets the table locator.

Returns

Cake\ORM\Locator\LocatorInterface

setTableLocator()source public

setTableLocator( Cake\ORM\Locator\LocatorInterface $tableLocator )

Sets the table locator.

Parameters

Cake\ORM\Locator\LocatorInterface $tableLocator
LocatorInterface instance.

Returns


$this

tableLocator()source public

tableLocator( Cake\ORM\Locator\LocatorInterface $tableLocator null )

Sets the table locator. If no parameters are passed, it will return the currently used locator.

Deprecated

3.5.0 Use getTableLocator()/setTableLocator() instead.

Parameters

Cake\ORM\Locator\LocatorInterface $tableLocator optional null
LocatorInterface instance.

Returns

Cake\ORM\Locator\LocatorInterface

Properties detail

$_validStrategiessource

protected array

Valid strategies for this type of association

[
    self::STRATEGY_JOIN,
    self::STRATEGY_SELECT
]

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https://api.cakephp.org/3.4/class-Cake.ORM.Association.HasOne.html