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<title>[43811] branches/5.0: Meta: Allow empty strings to be set by Custom Fields meta box.</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/43811">43811</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/43811","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>2018-10-23 18:55:45 +0000 (Tue, 23 Oct 2018)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Meta: Allow empty strings to be set by Custom Fields meta box.
Because the REST API allows meta keys to have empty values, the Custom Fields meta box should permit the same behavior.
Props charlestonsw, soulseekah.
Fixes <a href="https://core.trac.wordpress.org/ticket/43559">#43559</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#branches50srcwpadminincludesajaxactionsphp">branches/5.0/src/wp-admin/includes/ajax-actions.php</a></li>
<li><a href="#branches50srcwpadminincludespostphp">branches/5.0/src/wp-admin/includes/post.php</a></li>
<li><a href="#branches50testsphpunittestsadminincludesPostphp">branches/5.0/tests/phpunit/tests/admin/includesPost.php</a></li>
</ul>
<h3>Added Paths</h3>
<ul>
<li><a href="#branches50testsphpunittestsajaxAddMetaphp">branches/5.0/tests/phpunit/tests/ajax/AddMeta.php</a></li>
</ul>
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<h3>Diff</h3>
<a id="branches50srcwpadminincludesajaxactionsphp"></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-admin/includes/ajax-actions.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.0/src/wp-admin/includes/ajax-actions.php 2018-10-23 17:47:28 UTC (rev 43810)
+++ branches/5.0/src/wp-admin/includes/ajax-actions.php 2018-10-23 18:55:45 UTC (rev 43811)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1341,8 +1341,6 @@
</span><span class="cx" style="display: block; padding: 0 10px"> $value = wp_unslash( $_POST['meta'][$mid]['value'] );
</span><span class="cx" style="display: block; padding: 0 10px"> if ( '' == trim($key) )
</span><span class="cx" style="display: block; padding: 0 10px"> wp_die( __( 'Please provide a custom field name.' ) );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( '' == trim($value) )
- wp_die( __( 'Please provide a custom field value.' ) );
</del><span class="cx" style="display: block; padding: 0 10px"> if ( ! $meta = get_metadata_by_mid( 'post', $mid ) )
</span><span class="cx" style="display: block; padding: 0 10px"> wp_die( 0 ); // if meta doesn't exist
</span><span class="cx" style="display: block; padding: 0 10px"> if ( is_protected_meta( $meta->meta_key, 'post' ) || is_protected_meta( $key, 'post' ) ||
</span></span></pre></div>
<a id="branches50srcwpadminincludespostphp"></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-admin/includes/post.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.0/src/wp-admin/includes/post.php 2018-10-23 17:47:28 UTC (rev 43810)
+++ branches/5.0/src/wp-admin/includes/post.php 2018-10-23 18:55:45 UTC (rev 43811)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -814,7 +814,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> if ( is_string( $metavalue ) )
</span><span class="cx" style="display: block; padding: 0 10px"> $metavalue = trim( $metavalue );
</span><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( ('0' === $metavalue || ! empty ( $metavalue ) ) && ( ( ( '#NONE#' != $metakeyselect ) && !empty ( $metakeyselect) ) || !empty ( $metakeyinput ) ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( ( ( '#NONE#' != $metakeyselect ) && ! empty( $metakeyselect ) ) || ! empty( $metakeyinput ) ) {
</ins><span class="cx" style="display: block; padding: 0 10px"> /*
</span><span class="cx" style="display: block; padding: 0 10px"> * We have a key/value pair. If both the select and the input
</span><span class="cx" style="display: block; padding: 0 10px"> * for the key have data, the input takes precedence.
</span></span></pre></div>
<a id="branches50testsphpunittestsadminincludesPostphp"></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/admin/includesPost.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.0/tests/phpunit/tests/admin/includesPost.php 2018-10-23 17:47:28 UTC (rev 43810)
+++ branches/5.0/tests/phpunit/tests/admin/includesPost.php 2018-10-23 18:55:45 UTC (rev 43811)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -707,4 +707,21 @@
</span><span class="cx" style="display: block; padding: 0 10px"> $this->assertArrayHasKey( $name, $blocks );
</span><span class="cx" style="display: block; padding: 0 10px"> $this->assertSame( array( 'icon' => 'text' ), $blocks[ $name ] );
</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 43559
+ */
+ public function test_post_add_meta_empty_is_allowed() {
+ $p = self::factory()->post->create();
+
+ $_POST = array(
+ 'metakeyinput' => 'testkey',
+ 'metavalue' => '',
+ );
+
+ wp_set_current_user( self::$admin_id );
+
+ $this->assertNotFalse( add_meta( $p ) );
+ $this->assertEquals( '', get_post_meta( $p, 'testkey', true ) );
+ }
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span></span></pre></div>
<a id="branches50testsphpunittestsajaxAddMetaphp"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: branches/5.0/tests/phpunit/tests/ajax/AddMeta.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/5.0/tests/phpunit/tests/ajax/AddMeta.php (rev 0)
+++ branches/5.0/tests/phpunit/tests/ajax/AddMeta.php 2018-10-23 18:55:45 UTC (rev 43811)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,71 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+
+/**
+ * Admin ajax functions to be tested
+ */
+require_once( ABSPATH . 'wp-admin/includes/ajax-actions.php' );
+
+/**
+ * Testing Add Meta AJAX functionality.
+ *
+ * @group ajax
+ */
+class Tests_Ajax_AddMeta extends WP_Ajax_UnitTestCase {
+ /**
+ * @ticket 43559
+ */
+ public function test_post_add_meta_empty_is_allowed_ajax() {
+ $p = self::factory()->post->create();
+
+ // Become an administrator.
+ $this->_setRole( 'administrator' );
+
+ $_POST = array(
+ 'post_id' => $p,
+ 'metakeyinput' => 'testkey',
+ 'metavalue' => '',
+ '_ajax_nonce-add-meta' => wp_create_nonce( 'add-meta' ),
+ );
+
+ // Make the request.
+ try {
+ $this->_handleAjax( 'add-meta' );
+ } catch ( WPAjaxDieContinueException $e ) {
+ unset( $e );
+ }
+
+ $this->assertEquals( '', get_post_meta( $p, 'testkey', true ) );
+ }
+
+ /**
+ * @ticket 43559
+ */
+ public function test_post_update_meta_empty_is_allowed_ajax() {
+ $p = self::factory()->post->create();
+
+ $m = add_post_meta( $p, 'testkey', 'hello' );
+
+ // Become an administrator.
+ $this->_setRole( 'administrator' );
+
+ $_POST = array(
+ '_ajax_nonce-add-meta' => wp_create_nonce( 'add-meta' ),
+ 'post_id' => $p,
+ 'meta' => array(
+ $m => array(
+ 'key' => 'testkey',
+ 'value' => '',
+ ),
+ ),
+ );
+
+ // Make the request.
+ try {
+ $this->_handleAjax( 'add-meta' );
+ } catch ( WPAjaxDieContinueException $e ) {
+ unset( $e );
+ }
+
+ $this->assertEquals( '', get_post_meta( $p, 'testkey', true ) );
+ }
+}
</ins></span></pre>
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