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<title>[43918] branches/5.0: REST API: Preserve unknown, respect `null` in server-side block rendering.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/43918">43918</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/43918","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>danielbachhuber</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2018-11-21 14:43:33 +0000 (Wed, 21 Nov 2018)</dd>
</dl>
<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>REST API: Preserve unknown, respect `null` in server-side block rendering.
* Skips validation where there is no attribute definition, but keeps the attribute value. Previously, the attribute would be omitted from the attributes passed to `render_callback`. Notably, this resolves an issue where `render_callback` cannot receive a block's `align` and `customClassName` attribute values, since these are defined as a client-side filter.
* Validates `null` as a proper value in its own right. Previously, a client implementation of a block could track `{"attribute":null}` as an explicitly empty value, and the server would wrongly initiate defaulting behavior. The new behavior will now only populate a default value if the attribute is not defined at all, including when unset in its being invalid per the attribute schema.
Props aduth, noisysocks, youknowriad.
See <a href="https://core.trac.wordpress.org/ticket/45145">#45145</a> for the patch, <a href="https://core.trac.wordpress.org/ticket/45098">#45098</a> for the original ticket.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#branches50srcwpincludesclasswpblocktypephp">branches/5.0/src/wp-includes/class-wp-block-type.php</a></li>
<li><a href="#branches50srcwpincludesrestapiendpointsclasswprestblockrenderercontrollerphp">branches/5.0/src/wp-includes/rest-api/endpoints/class-wp-rest-block-renderer-controller.php</a></li>
<li><a href="#branches50testsphpunittestsblocksblocktypephp">branches/5.0/tests/phpunit/tests/blocks/block-type.php</a></li>
<li><a href="#branches50testsphpunittestsrestapirestblockrenderercontrollerphp">branches/5.0/tests/phpunit/tests/rest-api/rest-block-renderer-controller.php</a></li>
<li><a href="#branches50testsqunitfixtureswpapigeneratedjs">branches/5.0/tests/qunit/fixtures/wp-api-generated.js</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="branches50srcwpincludesclasswpblocktypephp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.0/src/wp-includes/class-wp-block-type.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.0/src/wp-includes/class-wp-block-type.php 2018-11-21 14:34:09 UTC (rev 43917)
+++ branches/5.0/src/wp-includes/class-wp-block-type.php 2018-11-21 14:43:33 UTC (rev 43918)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -123,7 +123,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="cx" style="display: block; padding: 0 10px"> * Validates attributes against the current block schema, populating
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * defaulted and missing values, and omitting unknown attributes.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * defaulted and missing values.
</ins><span class="cx" style="display: block; padding: 0 10px"> *
</span><span class="cx" style="display: block; padding: 0 10px"> * @since 5.0.0
</span><span class="cx" style="display: block; padding: 0 10px"> *
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -131,30 +131,41 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @return array Prepared block attributes.
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> public function prepare_attributes_for_render( $attributes ) {
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ // If there are no attribute definitions for the block type, skip
+ // processing and return vebatim.
</ins><span class="cx" style="display: block; padding: 0 10px"> if ( ! isset( $this->attributes ) ) {
</span><span class="cx" style="display: block; padding: 0 10px"> return $attributes;
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $prepared_attributes = array();
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ foreach ( $attributes as $attribute_name => $value ) {
+ // If the attribute is not defined by the block type, it cannot be
+ // validated.
+ if ( ! isset( $this->attributes[ $attribute_name ] ) ) {
+ continue;
+ }
</ins><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- foreach ( $this->attributes as $attribute_name => $schema ) {
- $value = null;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $schema = $this->attributes[ $attribute_name ];
</ins><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( isset( $attributes[ $attribute_name ] ) ) {
- $is_valid = rest_validate_value_from_schema( $attributes[ $attribute_name ], $schema );
- if ( ! is_wp_error( $is_valid ) ) {
- $value = rest_sanitize_value_from_schema( $attributes[ $attribute_name ], $schema );
- }
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ // Validate value by JSON schema. An invalid value should revert to
+ // its default, if one exists. This occurs by virtue of the missing
+ // attributes loop immediately following. If there is not a default
+ // assigned, the attribute value should remain unset.
+ $is_valid = rest_validate_value_from_schema( $value, $schema );
+ if ( is_wp_error( $is_valid ) ) {
+ unset( $attributes[ $attribute_name ] );
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ }
</ins><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( is_null( $value ) && isset( $schema['default'] ) ) {
- $value = $schema['default'];
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ // Populate values of any missing attributes for which the block type
+ // defines a default.
+ $missing_schema_attributes = array_diff_key( $this->attributes, $attributes );
+ foreach ( $missing_schema_attributes as $attribute_name => $schema ) {
+ if ( isset( $schema['default'] ) ) {
+ $attributes[ $attribute_name ] = $schema['default'];
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-
- $prepared_attributes[ $attribute_name ] = $value;
</del><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- return $prepared_attributes;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ return $attributes;
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span></span></pre></div>
<a id="branches50srcwpincludesrestapiendpointsclasswprestblockrenderercontrollerphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.0/src/wp-includes/rest-api/endpoints/class-wp-rest-block-renderer-controller.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.0/src/wp-includes/rest-api/endpoints/class-wp-rest-block-renderer-controller.php 2018-11-21 14:34:09 UTC (rev 43917)
+++ branches/5.0/src/wp-includes/rest-api/endpoints/class-wp-rest-block-renderer-controller.php 2018-11-21 14:43:33 UTC (rev 43918)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -61,6 +61,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 'type' => 'object',
</span><span class="cx" style="display: block; padding: 0 10px"> 'additionalProperties' => false,
</span><span class="cx" style="display: block; padding: 0 10px"> 'properties' => $block_type->get_attributes(),
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ 'default' => array(),
</ins><span class="cx" style="display: block; padding: 0 10px"> ),
</span><span class="cx" style="display: block; padding: 0 10px"> 'post_id' => array(
</span><span class="cx" style="display: block; padding: 0 10px"> 'description' => __( 'ID of the post context.' ),
</span></span></pre></div>
<a id="branches50testsphpunittestsblocksblocktypephp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.0/tests/phpunit/tests/blocks/block-type.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.0/tests/phpunit/tests/blocks/block-type.php 2018-11-21 14:34:09 UTC (rev 43917)
+++ branches/5.0/tests/phpunit/tests/blocks/block-type.php 2018-11-21 14:43:33 UTC (rev 43918)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -168,7 +168,8 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 'wrongType' => 5,
</span><span class="cx" style="display: block; padding: 0 10px"> 'wrongTypeDefaulted' => 5,
</span><span class="cx" style="display: block; padding: 0 10px"> /* missingDefaulted */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- 'undefined' => 'omit',
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ 'undefined' => 'include',
+ 'intendedNull' => null,
</ins><span class="cx" style="display: block; padding: 0 10px"> );
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> $block_type = new WP_Block_Type(
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -189,6 +190,10 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 'type' => 'string',
</span><span class="cx" style="display: block; padding: 0 10px"> 'default' => 'define',
</span><span class="cx" style="display: block; padding: 0 10px"> ),
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ 'intendedNull' => array(
+ 'type' => array( 'string', 'null' ),
+ 'default' => 'wrong',
+ ),
</ins><span class="cx" style="display: block; padding: 0 10px"> ),
</span><span class="cx" style="display: block; padding: 0 10px"> )
</span><span class="cx" style="display: block; padding: 0 10px"> );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -198,9 +203,11 @@
</span><span class="cx" style="display: block; padding: 0 10px"> $this->assertEquals(
</span><span class="cx" style="display: block; padding: 0 10px"> array(
</span><span class="cx" style="display: block; padding: 0 10px"> 'correct' => 'include',
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- 'wrongType' => null,
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ /* wrongType */
</ins><span class="cx" style="display: block; padding: 0 10px"> 'wrongTypeDefaulted' => 'defaulted',
</span><span class="cx" style="display: block; padding: 0 10px"> 'missingDefaulted' => 'define',
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ 'undefined' => 'include',
+ 'intendedNull' => null,
</ins><span class="cx" style="display: block; padding: 0 10px"> ),
</span><span class="cx" style="display: block; padding: 0 10px"> $prepared_attributes
</span><span class="cx" style="display: block; padding: 0 10px"> );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -207,6 +214,19 @@
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> /**
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @ticket 45145
+ */
+ function test_prepare_attributes_none_defined() {
+ $attributes = array( 'exists' => 'keep' );
+
+ $block_type = new WP_Block_Type( 'core/dummy', array() );
+
+ $prepared_attributes = $block_type->prepare_attributes_for_render( $attributes );
+
+ $this->assertEquals( $attributes, $prepared_attributes );
+ }
+
+ /**
</ins><span class="cx" style="display: block; padding: 0 10px"> * @ticket 45097
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> public function test_has_block_with_mixed_content() {
</span></span></pre></div>
<a id="branches50testsphpunittestsrestapirestblockrenderercontrollerphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.0/tests/phpunit/tests/rest-api/rest-block-renderer-controller.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.0/tests/phpunit/tests/rest-api/rest-block-renderer-controller.php 2018-11-21 14:34:09 UTC (rev 43917)
+++ branches/5.0/tests/phpunit/tests/rest-api/rest-block-renderer-controller.php 2018-11-21 14:43:33 UTC (rev 43918)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -319,7 +319,9 @@
</span><span class="cx" style="display: block; padding: 0 10px"> $block_type = WP_Block_Type_Registry::get_instance()->get_registered( self::$block_name );
</span><span class="cx" style="display: block; padding: 0 10px"> $defaults = array();
</span><span class="cx" style="display: block; padding: 0 10px"> foreach ( $block_type->attributes as $key => $attribute ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $defaults[ $key ] = isset( $attribute['default'] ) ? $attribute['default'] : null;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( isset( $attribute['default'] ) ) {
+ $defaults[ $key ] = $attribute['default'];
+ }
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> $request = new WP_REST_Request( 'GET', self::$rest_api_route . self::$block_name );
</span></span></pre></div>
<a id="branches50testsqunitfixtureswpapigeneratedjs"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/5.0/tests/qunit/fixtures/wp-api-generated.js</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.0/tests/qunit/fixtures/wp-api-generated.js 2018-11-21 14:34:09 UTC (rev 43917)
+++ branches/5.0/tests/qunit/fixtures/wp-api-generated.js 2018-11-21 14:43:33 UTC (rev 43918)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -4314,6 +4314,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> },
</span><span class="cx" style="display: block; padding: 0 10px"> "attributes": {
</span><span class="cx" style="display: block; padding: 0 10px"> "required": false,
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ "default": [],
</ins><span class="cx" style="display: block; padding: 0 10px"> "description": "Attributes for core/block block",
</span><span class="cx" style="display: block; padding: 0 10px"> "type": "object"
</span><span class="cx" style="display: block; padding: 0 10px"> },
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -4353,6 +4354,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> },
</span><span class="cx" style="display: block; padding: 0 10px"> "attributes": {
</span><span class="cx" style="display: block; padding: 0 10px"> "required": false,
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ "default": [],
</ins><span class="cx" style="display: block; padding: 0 10px"> "description": "Attributes for core/latest-comments block",
</span><span class="cx" style="display: block; padding: 0 10px"> "type": "object"
</span><span class="cx" style="display: block; padding: 0 10px"> },
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -4392,6 +4394,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> },
</span><span class="cx" style="display: block; padding: 0 10px"> "attributes": {
</span><span class="cx" style="display: block; padding: 0 10px"> "required": false,
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ "default": [],
</ins><span class="cx" style="display: block; padding: 0 10px"> "description": "Attributes for core/archives block",
</span><span class="cx" style="display: block; padding: 0 10px"> "type": "object"
</span><span class="cx" style="display: block; padding: 0 10px"> },
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -4431,6 +4434,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> },
</span><span class="cx" style="display: block; padding: 0 10px"> "attributes": {
</span><span class="cx" style="display: block; padding: 0 10px"> "required": false,
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ "default": [],
</ins><span class="cx" style="display: block; padding: 0 10px"> "description": "Attributes for core/categories block",
</span><span class="cx" style="display: block; padding: 0 10px"> "type": "object"
</span><span class="cx" style="display: block; padding: 0 10px"> },
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -4470,6 +4474,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> },
</span><span class="cx" style="display: block; padding: 0 10px"> "attributes": {
</span><span class="cx" style="display: block; padding: 0 10px"> "required": false,
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ "default": [],
</ins><span class="cx" style="display: block; padding: 0 10px"> "description": "Attributes for core/latest-posts block",
</span><span class="cx" style="display: block; padding: 0 10px"> "type": "object"
</span><span class="cx" style="display: block; padding: 0 10px"> },
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -4509,6 +4514,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> },
</span><span class="cx" style="display: block; padding: 0 10px"> "attributes": {
</span><span class="cx" style="display: block; padding: 0 10px"> "required": false,
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ "default": [],
</ins><span class="cx" style="display: block; padding: 0 10px"> "description": "Attributes for core/shortcode block",
</span><span class="cx" style="display: block; padding: 0 10px"> "type": "object"
</span><span class="cx" style="display: block; padding: 0 10px"> },
</span></span></pre>
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