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

Cake\ORM\Association\HasOne

Namespace: Cake\ORM\Association
Location: ORM/Association/HasOne.php

Inherited Constants

MANY_TO_MANY, MANY_TO_ONE, ONE_TO_MANY, ONE_TO_ONE, STRATEGY_JOIN, STRATEGY_SELECT, STRATEGY_SUBQUERY

Properties summary

$_validStrategies protected

array

Valid strategies for this type of association

Inherited Properties

_bindingKey, _cascadeCallbacks, _className, _conditions, _dependent, _finder, _foreignKey, _joinType, _name, _propertyName, _sourceTable, _strategy, _targetTable _tableLocator

Method Summary

_propertyName() protected

Returns default property name based on association name.
cascadeDelete() public

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.
getForeignKey() public

Gets the name of the field representing the foreign key to the target table.
isOwningSide() public

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.
saveAssociated() public

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() protected ¶

_propertyName( )

Returns default property name based on association name.

Returns

string

Overrides

Cake\ORM\Association::_propertyName()

cascadeDelete() 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

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

Closure

getForeignKey() public ¶

getForeignKey( )

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

Returns

string

Overrides

Cake\ORM\Association::getForeignKey()

isOwningSide() 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() 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() public ¶

type( )

Get the relationship type.

Returns

string

Methods inherited from Cake\ORM\Association

__call() 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() 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() 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() 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() 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() 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() 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() 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() 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() 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() 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() 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() 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() 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() public deprecated ¶

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() 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() public deprecated ¶

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() public deprecated ¶

className( )

The class name of the target table object

Deprecated

3.7.0 Use getClassName() instead.

Returns

string

conditions() public deprecated ¶

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|callable

See

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

defaultRowValue() 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() 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() public deprecated ¶

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() 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() 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() public deprecated ¶

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|array

foreignKey() public deprecated ¶

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() 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|string[]

getCascadeCallbacks() public ¶

getCascadeCallbacks( )

Gets whether or not cascaded deletes should also fire callbacks.

Returns

boolean

getClassName() public ¶

getClassName( )

Gets the class name of the target table object.

Returns

string

getConditions() public ¶

getConditions( )

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

Returns

array|callable

See

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

getDependent() 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() public ¶

getFinder( )

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

Returns

string|array

getJoinType() public ¶

getJoinType( )

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

Returns

string

getName() public ¶

getName( )

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

Returns

string

getProperty() public ¶

getProperty( )

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

Returns

string

getSource() public ¶

getSource( )

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

Returns

Cake\ORM\Table

getStrategy() 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() public ¶

getTarget( )

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

Returns

Cake\ORM\Table

joinType() public deprecated ¶

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() public deprecated ¶

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() public deprecated ¶

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() 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() public ¶

setBindingKey( string|string[] $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|string[] $key: the table field or fields to be used to link both tables together

Returns

$this

setCascadeCallbacks() public ¶

setCascadeCallbacks( boolean $cascadeCallbacks )

Sets whether or not cascaded deletes should also fire callbacks.

Parameters

boolean $cascadeCallbacks: cascade callbacks switch value

Returns

$this

setClassName() public ¶

setClassName( string $className )

Sets the class name of the target table object.

Parameters

string $className: Class name to set.

Returns

$this

Throws

InvalidArgumentException

In case the class name is set after the target table has been resolved, and it doesn't match the target table's class name.

setConditions() public ¶

setConditions( array|callable $conditions )

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

Parameters

array|callable $conditions: list of conditions to be used

Returns

$this

See

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

setDependent() 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() public ¶

setFinder( string|array $finder )

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

Parameters

string|array $finder: the finder name to use or array of finder name and option.

Returns

$this

setForeignKey() public ¶

setForeignKey( string|string[] $key )

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

Parameters

string|string[] $key: the key or keys to be used to link both tables together

Returns

$this

setJoinType() 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() 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() 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() 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() 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() 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() public deprecated ¶

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() public deprecated ¶

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() public deprecated ¶

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() 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() 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

integer
Count Returns the affected rows.

See

\Cake\ORM\Table::updateAll()

Methods used from Cake\Core\ConventionsTrait

_camelize() protected ¶

_camelize( string $name )

Creates a camelized version of $name

Parameters

string $name: name

Returns

string
Camelized name

_entityName() 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() protected ¶

_fixtureName( string $name )

Creates a fixture name

Parameters

string $name: Model class name

Returns

string
Singular model key

_modelKey() 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() protected ¶

_modelNameFromKey( string $key )

Creates the proper model name from a foreign key

Parameters

string $key: Foreign key

Returns

string
Model name

_pluginNamespace() protected ¶

_pluginNamespace( string $pluginName )

Return plugin's namespace

Parameters

string $pluginName: Plugin name

Returns

string
Plugin's namespace

_pluginPath() 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() protected ¶

_pluralHumanName( string $name )

Creates the plural human name used in views

Parameters

string $name: Controller name

Returns

string
Plural human name

_singularHumanName() protected ¶

_singularHumanName( string $name )

Creates the singular human name used in views

Parameters

string $name: Controller name

Returns

string
Singular human name

_singularName() protected ¶

_singularName( string $name )

Creates the singular name for use in views.

Parameters

string $name: Name to use

Returns

string
Variable name

_variableName() 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() public ¶

getTableLocator( )

Gets the table locator.

Returns

Cake\ORM\Locator\LocatorInterface

setTableLocator() public ¶

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

Sets the table locator.

Parameters

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

Returns

$this

tableLocator() public deprecated ¶

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

`$_validStrategies` ¶

protected array

Valid strategies for this type of association

[
    self::STRATEGY_JOIN,
    self::STRATEGY_SELECT
]

Namespaces

Classes

Traits

Class HasOne

Inherited Constants

Properties summary

Inherited Properties

Method Summary

_propertyName() protected

cascadeDelete() public

eagerLoader() public

getForeignKey() public

isOwningSide() public

saveAssociated() public

type() public

Method Detail

_propertyName() protected ¶

Returns

Overrides

cascadeDelete() public ¶

Parameters

Returns

eagerLoader() public ¶

Parameters

Returns

getForeignKey() public ¶

Returns

Overrides

isOwningSide() public ¶

Parameters

Returns

saveAssociated() public ¶

Parameters

Returns

See

type() public ¶

Returns

Methods inherited from Cake\ORM\Association

__call() public ¶

Parameters

Returns

Throws

__construct() public ¶

Parameters

__get() public ¶

Parameters

Returns

Throws

__isset() public ¶

Parameters

Returns

_appendFields() protected ¶

Parameters

_appendNotMatching() protected ¶

Parameters

_bindNewAssociations() protected ¶

Parameters

_dispatchBeforeFind() protected ¶

Parameters

_extractFinder() protected ¶

Examples:

Parameters

Returns

_formatAssociationResults() protected ¶

Parameters

_getClassName() protected ¶

Parameters

Returns

_joinCondition() protected ¶

Parameters

Returns

Throws

_options() protected ¶

Parameters

attachTo() public ¶

Parameters

Throws

bindingKey() public deprecated ¶

Deprecated

Parameters