Public Member Functions
	__construct (Database $db, EntityTable $entities, MetadataTable $metadata, EventsService $events)
	Constructor. More...

	get ($id)
	Get a relationship by its ID. More...

	getRow ($id)
	Get a database row from the relationship table. More...

	delete ($id, $call_event=true)
	Delete a relationship by its ID. More...

	add ($guid_one, $relationship, $guid_two, $return_id=false)
	Create a relationship between two entities. More...

	check ($guid_one, $relationship, $guid_two)
	Check if a relationship exists between two entities. More...

	remove ($guid_one, $relationship, $guid_two)
	Delete a relationship between two entities. More...

	removeAll ($guid, $relationship="", $inverse_relationship=false, $type= '')
	Removes all relationships originating from a particular entity. More...

	getAll ($guid, $inverse_relationship=false)
	Get all the relationships for a given GUID. More...

	getEntities ($options)
	Return entities matching a given query joining against a relationship. More...

	getEntityRelationshipWhereSql ($column, $relationship=null, $relationship_guid=null, $inverse_relationship=false)
	Returns SQL appropriate for relationship joins and wheres. More...

	getEntitiesFromCount (array $options=array())
	Gets the number of entities by a the number of entities related to them in a particular way. More...

	rowToElggRelationship ($row)
	Convert a database row to a new . More...

Protected Attributes
	$db

	$entities

	$metadata

	$events

Detailed Description

Definition at line 17 of file RelationshipsTable.php.

Constructor & Destructor Documentation

Elgg\Database\RelationshipsTable::__construct	(	Database	$db,
		EntityTable	$entities,
		MetadataTable	$metadata,
		EventsService	$events
	)

Constructor.

Parameters

Database	$db	Elgg Database
EntityTable	$entities	Entity table
MetadataTable	$metadata	Metadata table
EventsService	$events	Events service

Definition at line 49 of file RelationshipsTable.php.

Member Function Documentation

Elgg\Database\RelationshipsTable::add	(	$guid_one,
		$relationship,
		$guid_two,
		$return_id = `false`
	)

Create a relationship between two entities.

E.g. friendship, group membership, site membership.

This function lets you make the statement "$guid_one is a $relationship of $guid_two". In the statement, $guid_one is the subject of the relationship, $guid_two is the target, and $relationship is the type.

Parameters

int	$guid_one	GUID of the subject entity of the relationship
string	$relationship	Type of the relationship
int	$guid_two	GUID of the target entity of the relationship
bool	$return_id	Return the ID instead of bool?

Returns: bool|int

Exceptions

Definition at line 126 of file RelationshipsTable.php.

Elgg\Database\RelationshipsTable::check	(	$guid_one,
		$relationship,
		$guid_two
	)

Check if a relationship exists between two entities.

If so, the relationship object is returned.

This function lets you ask "Is $guid_one a $relationship of $guid_two?"

Parameters

int	$guid_one	GUID of the subject entity of the relationship
string	$relationship	Type of the relationship
int	$guid_two	GUID of the target entity of the relationship

Returns: |false Depending on success

Definition at line 186 of file RelationshipsTable.php.

Elgg\Database\RelationshipsTable::delete	(	$id,
		$call_event = `true`
	)

Delete a relationship by its ID.

Parameters

int	$id	Relationship ID
bool	$call_event	Call the delete event before deleting

Returns: bool

Definition at line 96 of file RelationshipsTable.php.

Elgg\Database\RelationshipsTable::get ( $id )

Get a relationship by its ID.

Parameters

int $id The relationship ID

Returns: |false False if not found

Definition at line 63 of file RelationshipsTable.php.

Elgg\Database\RelationshipsTable::getAll	(	$guid,
		$inverse_relationship = `false`
	)

Get all the relationships for a given GUID.

Parameters

int	$guid	GUID of the subject or target entity (see $inverse)
bool	$inverse_relationship	Is $guid the target of the deleted relationships? By default $guid is the subject of the relationships.

Returns: []

Definition at line 283 of file RelationshipsTable.php.

Elgg\Database\RelationshipsTable::getEntities ( $options )

Return entities matching a given query joining against a relationship.

Also accepts all options available to elgg_get_entities() and elgg_get_entities_from_metadata().

To ask for entities that do not have a particular relationship to an entity, use a custom where clause like the following:

$options['wheres'][] = "NOT EXISTS (
    SELECT 1 FROM {$db_prefix}entity_relationships
        WHERE guid_one = e.guid
        AND relationship = '$relationship'
)";

See also: elgg_get_entities; elgg_get_entities_from_metadata

Parameters

array $options Array in format:

relationship => null|STR Type of the relationship. E.g. "member"

relationship_guid => null|INT GUID of the subject of the relationship, unless "inverse_relationship" is set to true, in which case this will specify the target.

inverse_relationship => false|BOOL Are we searching for relationship subjects? By default, the query finds targets of relationships.

relationship_join_on => null|STR How the entities relate: guid (default), container_guid, or owner_guid Examples using the relationship 'friend':

use 'guid' if you want the user's friends
use 'owner_guid' if you want the entities the user's friends own (including in groups)
use 'container_guid' if you want the entities in the user's personal space (non-group)

relationship_created_time_lower => null|INT Relationship created time lower boundary in epoch time

relationship_created_time_upper => null|INT Relationship created time upper boundary in epoch time

Returns: []|mixed If count, int. If not count, array. false on errors.

Definition at line 334 of file RelationshipsTable.php.

Elgg\Database\RelationshipsTable::getEntitiesFromCount ( array $options = array() )

Gets the number of entities by a the number of entities related to them in a particular way.

This is a good way to get out the users with the most friends, or the groups with the most members.

Parameters

array $options An options array compatible with elgg_get_entities_from_relationship()

Returns: []|int|boolean If count, int. If not count, array. false on errors.

Definition at line 460 of file RelationshipsTable.php.

Elgg\Database\RelationshipsTable::getEntityRelationshipWhereSql	(	$column,
		$relationship = `null`,
		$relationship_guid = `null`,
		$inverse_relationship = `false`
	)

Returns SQL appropriate for relationship joins and wheres.

Parameters

string	$column	Column name the GUID should be checked against. Provide in table.column format.
string	$relationship	Type of the relationship
int	$relationship_guid	Entity GUID to check
bool	$inverse_relationship	Is $relationship_guid the target of the relationship?

Returns: mixed private

Definition at line 410 of file RelationshipsTable.php.

Elgg\Database\RelationshipsTable::getRow ( $id )

Get a database row from the relationship table.

Parameters

int $id The relationship ID

Returns: |false False if no row found private

Definition at line 80 of file RelationshipsTable.php.

Elgg\Database\RelationshipsTable::remove	(	$guid_one,
		$relationship,
		$guid_two
	)

Delete a relationship between two entities.

This function lets you say "$guid_one is no longer a $relationship of $guid_two."

Parameters

int	$guid_one	GUID of the subject entity of the relationship
string	$relationship	Type of the relationship
int	$guid_two	GUID of the target entity of the relationship

Returns: bool

Definition at line 218 of file RelationshipsTable.php.

Elgg\Database\RelationshipsTable::removeAll	(	$guid,
		$relationship = `""`,
		$inverse_relationship = `false`,
		$type = `''`
	)

Removes all relationships originating from a particular entity.

Parameters

int	$guid	GUID of the subject or target entity (see $inverse)
string	$relationship	Type of the relationship (optional, default is all relationships)
bool	$inverse_relationship	Is $guid the target of the deleted relationships? By default, $guid is the subject of the relationships.
string	$type	The type of entity related to $guid (defaults to all)

Returns: true

Definition at line 238 of file RelationshipsTable.php.

Elgg\Database\RelationshipsTable::rowToElggRelationship ( $row )

Convert a database row to a new .

Parameters

\stdClass $row Database row from the relationship table

Returns: |false private

Definition at line 475 of file RelationshipsTable.php.

Member Data Documentation

Elgg\Database\RelationshipsTable::$db

protected

Definition at line 24 of file RelationshipsTable.php.

Elgg\Database\RelationshipsTable::$entities

protected

Definition at line 29 of file RelationshipsTable.php.

Elgg\Database\RelationshipsTable::$events

protected

Definition at line 39 of file RelationshipsTable.php.

Elgg\Database\RelationshipsTable::$metadata

protected

Definition at line 34 of file RelationshipsTable.php.

The documentation for this class was generated from the following file:

engine/classes/Elgg/Database/RelationshipsTable.php

Public Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation