Value object representing a content slot associated with a page revision. More...

Public Member Functions
	__construct (\stdClass $row, $content, bool $derived=false)
	The following fields are supported by the $row parameter:

	getAddress ()
	Returns the address of this slot's content.

	getContent ()
	Returns the Content of the given slot.

	getContentId ()
	Returns the ID of the content meta data row associated with the slot.

	getFormat ()
	Returns the blob serialization format as a MIME type.

	getModel ()
	Returns the content model.

	getOrigin ()
	Returns the revision ID of the revision that originated the slot's content.

	getRevision ()
	Returns the ID of the revision this slot is associated with.

	getRole ()
	Returns the role of the slot.

	getSha1 ()
	Returns the content size.

	getSize ()
	Returns the content size.

	hasAddress ()
	Whether this slot has an address.

	hasContentId ()
	Whether this slot has a content ID.

	hasOrigin ()
	Whether this slot has an origin (revision ID that originated the slot's content.

	hasRevision ()
	Whether this slot has revision ID associated.

	hasSameContent (SlotRecord $other)
	Returns true if $other has the same content as this slot.

	isDerived ()

	isInherited ()
	Whether this slot was inherited from an older revision.

Static Public Member Functions
static	base36Sha1 ( $blob)
	Get the base 36 SHA-1 value for a string of text.

static	newDerived (string $role, Content $content)
	Returns a SlotRecord for a derived slot.

static	newInherited (SlotRecord $slot)
	Constructs a new SlotRecord for a new revision, inheriting the content of the given SlotRecord of a previous revision.

static	newSaved (int $revisionId, ?int $contentId, string $contentAddress, SlotRecord $protoSlot)
	Constructs a complete SlotRecord for a newly saved revision, based on the incomplete proto-slot.

static	newUnsaved (string $role, Content $content, bool $derived=false)
	Constructs a new Slot from a Content object for a new revision.

static	newWithSuppressedContent (SlotRecord $slot)
	Returns a new SlotRecord just like the given $slot, except that calling getContent() will fail with an exception.

Public Attributes
const	MAIN = 'main'

Detailed Description

Value object representing a content slot associated with a page revision.

SlotRecord provides direct access to a Content object. That access may be implemented through a callback.

Since: 1.31; 1.32 Renamed from MediaWiki\Storage\SlotRecord

Definition at line 40 of file SlotRecord.php.

Constructor & Destructor Documentation

◆ __construct()

MediaWiki\Revision\SlotRecord::__construct	(	\stdClass	$row,
			$content,
		bool	$derived = false )

The following fields are supported by the $row parameter:

$row->blob_data $row->blob_address

Parameters

\\stdClass	$row	A database row composed of fields of the slot and content tables, as a raw object. Any field value can be a callback that produces the field value given this SlotRecord as a parameter. However, plain strings cannot be used as callbacks here, for security reasons.
Content \| callable	$content	The content object associated with the slot, or a callback that will return that Content object, given this SlotRecord as a parameter.
bool	$derived	Is this handler for a derived slot? Derived slots allow information that is derived from the content of a page to be stored even if it is generated asynchronously or updated later. Their size is not included in the revision size, their hash does not contribute to the revision hash, and updates are not included in revision history.

Definition at line 258 of file SlotRecord.php.

Member Function Documentation

◆ base36Sha1()

static MediaWiki\Revision\SlotRecord::base36Sha1 ( $blob )

static

Get the base 36 SHA-1 value for a string of text.

MCR migration note: this replaced Revision::base36Sha1

Parameters

string $blob

Returns: string

Definition at line 632 of file SlotRecord.php.

Referenced by MediaWiki\Revision\SlotRecord\getSha1().

◆ getAddress()

MediaWiki\Revision\SlotRecord::getAddress ( )

Returns the address of this slot's content.

This address can be used with BlobStore to load the Content object.

Returns: string

Definition at line 519 of file SlotRecord.php.

Referenced by MediaWiki\Revision\SlotRecord\hasSameContent(), MediaWiki\Revision\SlotRecord\newInherited(), and MediaWiki\Revision\SlotRecord\newSaved().

◆ getContent()

MediaWiki\Revision\SlotRecord::getContent ( )

Returns the Content of the given slot.

Note: This is free to load Content from whatever subsystem is necessary, performing potentially expensive operations and triggering I/O-related failure modes.; This method does not apply audience filtering.

Exceptions

SuppressedDataException	if access to the content is not allowed according to the audience check performed by RevisionRecord::getSlot().
BadRevisionException	if the revision is permanently missing
RevisionAccessException	for other storage access errors

Returns: Content The slot's content. This is a direct reference to the internal instance, copy before exposing to application logic!

Definition at line 319 of file SlotRecord.php.

Referenced by MediaWiki\Revision\SlotRecord\getModel(), MediaWiki\Revision\SlotRecord\getSha1(), and MediaWiki\Revision\SlotRecord\getSize().

◆ getContentId()

MediaWiki\Revision\SlotRecord::getContentId ( )

Returns the ID of the content meta data row associated with the slot.

This information should be irrelevant to application logic, it is here to allow the construction of a full row for the revision table.

Note that this method may return an emulated value during schema migration in SCHEMA_COMPAT_WRITE_OLD mode. See RevisionStore::emulateContentId for more information.

Returns: int

Definition at line 533 of file SlotRecord.php.

Referenced by MediaWiki\Revision\SlotRecord\newSaved().

◆ getFormat()

MediaWiki\Revision\SlotRecord::getFormat ( )

Returns the blob serialization format as a MIME type.

Note: When this method returns null, the caller is expected to auto-detect the serialization format, or to rely on the default format associated with the content model.

Returns: string|null

Definition at line 606 of file SlotRecord.php.

◆ getModel()

MediaWiki\Revision\SlotRecord::getModel ( )

Returns the content model.

This is the model name that decides which ContentHandler is appropriate for interpreting the data of the blob referenced by the address returned by getAddress().

Returns: string the content model of the content

Definition at line 586 of file SlotRecord.php.

References MediaWiki\Revision\SlotRecord\getContent().

Referenced by MediaWiki\Revision\SlotRecord\hasSameContent().

◆ getOrigin()

MediaWiki\Revision\SlotRecord::getOrigin ( )

Returns the revision ID of the revision that originated the slot's content.

Returns: int

Definition at line 425 of file SlotRecord.php.

Referenced by MediaWiki\Revision\SlotRecord\isInherited(), MediaWiki\Revision\SlotRecord\newInherited(), and MediaWiki\Revision\SlotRecord\newSaved().

◆ getRevision()

MediaWiki\Revision\SlotRecord::getRevision ( )

Returns the ID of the revision this slot is associated with.

Returns: int

Definition at line 416 of file SlotRecord.php.

Referenced by MediaWiki\Revision\SlotRecord\isInherited(), MediaWiki\Revision\SlotRecord\newInherited(), MediaWiki\Revision\SlotRecord\newSaved(), and MediaWiki\Revision\MutableRevisionRecord\setSlot().

◆ getRole()

MediaWiki\Revision\SlotRecord::getRole ( )

Returns the role of the slot.

Returns: string

Definition at line 509 of file SlotRecord.php.

Referenced by MediaWiki\Storage\RevisionSlotsUpdate\modifySlot(), MediaWiki\Revision\MutableRevisionSlots\setSlot(), and MediaWiki\Storage\PageUpdater\setSlot().

◆ getSha1()

MediaWiki\Revision\SlotRecord::getSha1 ( )

Returns the content size.

Returns: string hash of the content.

Definition at line 558 of file SlotRecord.php.

References MediaWiki\Revision\SlotRecord\base36Sha1(), and MediaWiki\Revision\SlotRecord\getContent().

Referenced by MediaWiki\Revision\SlotRecord\hasSameContent().

◆ getSize()

MediaWiki\Revision\SlotRecord::getSize ( )

Returns the content size.

Returns: int size of the content, in bogo-bytes, as reported by Content::getSize.

Definition at line 542 of file SlotRecord.php.

References MediaWiki\Revision\SlotRecord\getContent().

Referenced by MediaWiki\Revision\SlotRecord\hasSameContent().

◆ hasAddress()

MediaWiki\Revision\SlotRecord::hasAddress ( )

Whether this slot has an address.

Slots will have an address if their content has been stored. While building a new revision, SlotRecords will not have an address associated.

Returns: bool

Definition at line 455 of file SlotRecord.php.

Referenced by MediaWiki\Revision\SlotRecord\hasSameContent(), MediaWiki\Revision\SlotRecord\isInherited(), and MediaWiki\Revision\SlotRecord\newSaved().

◆ hasContentId()

MediaWiki\Revision\SlotRecord::hasContentId ( )

Whether this slot has a content ID.

Slots will have a content ID if their content has been stored in the content table. While building a new revision, SlotRecords will not have an ID associated.

Also, during schema migration, hasContentId() may return false when encountering an un-migrated database entry in SCHEMA_COMPAT_WRITE_BOTH mode. It will however always return true for saved revisions on SCHEMA_COMPAT_READ_NEW mode, or without SCHEMA_COMPAT_WRITE_NEW mode. In the latter case, an emulated content ID is used, derived from the revision's text ID.

Note that hasContentId() returning false while hasRevision() returns true always indicates an unmigrated row in SCHEMA_COMPAT_WRITE_BOTH mode, as described above. For an unsaved slot, both these methods would return false.

Since: 1.32

Returns: bool

Definition at line 489 of file SlotRecord.php.

Referenced by MediaWiki\Revision\SlotRecord\newSaved().

◆ hasOrigin()

MediaWiki\Revision\SlotRecord::hasOrigin ( )

Whether this slot has an origin (revision ID that originated the slot's content.

Since: 1.32

Returns: bool

Definition at line 466 of file SlotRecord.php.

◆ hasRevision()

MediaWiki\Revision\SlotRecord::hasRevision ( )

Whether this slot has revision ID associated.

Slots will have a revision ID associated only if they were loaded as part of an existing revision. While building a new revision, Slotrecords will not have a revision ID associated.

Returns: bool

Definition at line 500 of file SlotRecord.php.

Referenced by MediaWiki\Revision\SlotRecord\isInherited(), MediaWiki\Revision\SlotRecord\newSaved(), and MediaWiki\Revision\MutableRevisionRecord\setSlot().

◆ hasSameContent()

MediaWiki\Revision\SlotRecord::hasSameContent ( SlotRecord $other )

Returns true if $other has the same content as this slot.

The check is performed based on the model, address size, and hash. Two slots can have the same content if they use different content addresses, but if they have the same address and the same model, they have the same content. Two slots can have the same content if they belong to different revisions or pages.

Note that hasSameContent() may return false even if Content::equals returns true for the content of two slots. This may happen if the two slots have different serializations representing equivalent Content. Such false negatives are considered acceptable. Code that has to be absolutely sure the Content is really not the same if hasSameContent() returns false should call getContent() and compare the Content objects directly.

Since: 1.32

Parameters

SlotRecord $other

Returns: bool

Definition at line 655 of file SlotRecord.php.

References MediaWiki\Revision\SlotRecord\getAddress(), MediaWiki\Revision\SlotRecord\getModel(), MediaWiki\Revision\SlotRecord\getSha1(), MediaWiki\Revision\SlotRecord\getSize(), and MediaWiki\Revision\SlotRecord\hasAddress().

◆ isDerived()

MediaWiki\Revision\SlotRecord::isDerived ( )

Returns: bool Is this a derived slot?

Since: 1.36

Definition at line 686 of file SlotRecord.php.

◆ isInherited()

MediaWiki\Revision\SlotRecord::isInherited ( )

Whether this slot was inherited from an older revision.

If this SlotRecord is already attached to a revision, this returns true if the slot's revision of origin is the same as the revision it belongs to.

If this SlotRecord is not yet attached to a revision, this returns true if the slot already has an address.

Returns: bool

Definition at line 440 of file SlotRecord.php.

References MediaWiki\Revision\SlotRecord\getOrigin(), MediaWiki\Revision\SlotRecord\getRevision(), MediaWiki\Revision\SlotRecord\hasAddress(), and MediaWiki\Revision\SlotRecord\hasRevision().

Referenced by MediaWiki\Revision\RevisionSlots\getOriginalSlots(), and MediaWiki\Revision\SlotRecord\newSaved().

◆ newDerived()

static MediaWiki\Revision\SlotRecord::newDerived	(	string	$role,
		Content	$content )

static

Returns a SlotRecord for a derived slot.

Parameters

string	$role
Content	$content	Initial content

Returns: SlotRecord

Since: 1.36

Definition at line 93 of file SlotRecord.php.

References MediaWiki\Revision\SlotRecord\newUnsaved().

◆ newInherited()

static MediaWiki\Revision\SlotRecord::newInherited ( SlotRecord $slot )

static

Constructs a new SlotRecord for a new revision, inheriting the content of the given SlotRecord of a previous revision.

Note that a SlotRecord constructed this way are intended as prototypes, to be used wit newSaved(). They are incomplete, so some getters such as getRevision() will fail.

Parameters

SlotRecord $slot

Returns: SlotRecord

Definition at line 129 of file SlotRecord.php.

References MediaWiki\Revision\SlotRecord\getAddress(), MediaWiki\Revision\SlotRecord\getOrigin(), and MediaWiki\Revision\SlotRecord\getRevision().

Referenced by MediaWiki\Revision\MutableRevisionSlots\inheritSlot(), and MediaWiki\Revision\MutableRevisionSlots\newFromParentRevisionSlots().

◆ newSaved()

static MediaWiki\Revision\SlotRecord::newSaved	(	int	$revisionId,
		?int	$contentId,
		string	$contentAddress,
		SlotRecord	$protoSlot )

static

Constructs a complete SlotRecord for a newly saved revision, based on the incomplete proto-slot.

This adds information that has only become available during saving, particularly the revision ID, content ID and content address.

Parameters

int	$revisionId	the revision the slot is to be associated with (field slot_revision_id). If $protoSlot already has a revision, it must be the same.
int \| null	$contentId	the ID of the row in the content table describing the content referenced by $contentAddress (field slot_content_id). If $protoSlot already has a content ID, it must be the same.
string	$contentAddress	the slot's content address (field content_address). If $protoSlot already has an address, it must be the same.
SlotRecord	$protoSlot	The proto-slot that was provided as input for creating a new revision. $protoSlot must have a content address if inherited.

Returns: SlotRecord If the state of $protoSlot is inappropriate for saving a new revision.

Definition at line 188 of file SlotRecord.php.

References MediaWiki\Revision\SlotRecord\getAddress(), MediaWiki\Revision\SlotRecord\getContentId(), MediaWiki\Revision\SlotRecord\getOrigin(), MediaWiki\Revision\SlotRecord\getRevision(), MediaWiki\Revision\SlotRecord\hasAddress(), MediaWiki\Revision\SlotRecord\hasContentId(), MediaWiki\Revision\SlotRecord\hasRevision(), and MediaWiki\Revision\SlotRecord\isInherited().

◆ newUnsaved()

static MediaWiki\Revision\SlotRecord::newUnsaved	(	string	$role,
		Content	$content,
		bool	$derived = false )

static

Constructs a new Slot from a Content object for a new revision.

This is the preferred way to construct a slot for storing Content that resulted from a user edit. The slot is assumed to be not inherited.

Note that a SlotRecord constructed this way are intended as prototypes, to be used wit newSaved(). They are incomplete, so some getters such as getAddress() will fail.

Parameters

string	$role
Content	$content
bool	$derived

Returns: SlotRecord An incomplete proto-slot object, to be used with newSaved() later.

Definition at line 155 of file SlotRecord.php.

References Content\getModel().

Referenced by MediaWiki\Revision\SlotRecord\newDerived(), and MediaWiki\Revision\MutableRevisionSlots\setContent().

◆ newWithSuppressedContent()

static MediaWiki\Revision\SlotRecord::newWithSuppressedContent ( SlotRecord $slot )

static

Returns a new SlotRecord just like the given $slot, except that calling getContent() will fail with an exception.

Parameters

SlotRecord $slot

Returns: SlotRecord

Definition at line 70 of file SlotRecord.php.

Member Data Documentation

◆ MAIN

const MediaWiki\Revision\SlotRecord::MAIN = 'main'

Definition at line 43 of file SlotRecord.php.

Referenced by MediaWiki\Revision\MainSlotRoleHandler\__construct(), MediaWiki\Revision\RevisionStore\insertRevisionOn(), and MediaWiki\Revision\RenderedRevision\setRevisionParserOutput().

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

includes/Revision/SlotRecord.php

Public Member Functions

Static Public Member Functions

Public Attributes

Detailed Description

Constructor & Destructor Documentation

◆ __construct()

Member Function Documentation

◆ base36Sha1()

◆ getAddress()

◆ getContent()

◆ getContentId()

◆ getFormat()

◆ getModel()

◆ getOrigin()

◆ getRevision()

◆ getRole()

◆ getSha1()

◆ getSize()

◆ hasAddress()

◆ hasContentId()

◆ hasOrigin()

◆ hasRevision()

◆ hasSameContent()

◆ isDerived()

◆ isInherited()

◆ newDerived()

◆ newInherited()

◆ newSaved()

◆ newUnsaved()

◆ newWithSuppressedContent()

Member Data Documentation

◆ MAIN