Fix termmeta pre-fetching in wp_get_object_terms().

[34529] introduced logic intended to prime the termmeta cache for certain
values of the `fields` parameter. There were a few bugs:

* The `all_with_object_id` param was misspelled.
* `term_id` was used instead of `ids`.
* The values being passed to `update_termmeta_cache()` in the case where `fields=ids` was not correct.

All of these would result in a failure to pre-fetch termmeta in some cases.

Props dlh.
Fixes #36932.

git-svn-id: https://develop.svn.wordpress.org/trunk@37567 602fd350-edb4-49c9-b593-d223f7449a82

Author: boonebgorges

src/wp-includes/taxonomy.php

@@ -2628,9 +2628,9 @@ function wp_get_object_terms($object_ids, $taxonomies, $args = array()) {
 	}
 
 	// Update termmeta cache, if necessary.
-	if ( $args['update_term_meta_cache'] && ( 'all' === $fields || 'all_with_object_ids' === $fields || 'term_id' === $fields ) ) {
-		if ( 'term_id' === $fields ) {
-			$term_ids = $fields;
+	if ( $args['update_term_meta_cache'] && ( 'all' === $fields || 'all_with_object_id' === $fields || 'ids' === $fields ) ) {
+		if ( 'ids' === $fields ) {
+			$term_ids = $terms;
 		} else {
 			$term_ids = wp_list_pluck( $terms, 'term_id' );
 		}

tests/phpunit/tests/term/wpGetObjectTerms.php

@@ -472,6 +472,64 @@ public function test_termmeta_cache_should_not_be_primed_when_update_term_meta_c
 		$this->assertSame( $num_queries + 3, $wpdb->num_queries );
 	}
 
+	/**
+	 * @ticket 36932
+	 */
+	public function test_termmeta_cache_should_be_primed_when_fields_is_all_with_object_id() {
+		global $wpdb;
+
+		register_taxonomy( 'wptests_tax', 'post' );
+		$terms = self::factory()->term->create_many( 3, array( 'taxonomy' => 'wptests_tax' ) );
+		add_term_meta( $terms[0], 'foo', 'bar' );
+		add_term_meta( $terms[1], 'foo', 'bar' );
+		add_term_meta( $terms[2], 'foo', 'bar' );
+
+		$p = self::factory()->post->create();
+		wp_set_object_terms( $p, $terms, 'wptests_tax' );
+
+		$found = wp_get_object_terms( $p, 'wptests_tax', array(
+			'update_term_meta_cache' => true,
+			'fields' => 'all_with_object_id',
+		) );
+
+		$num_queries = $wpdb->num_queries;
+
+		foreach ( $terms as $t ) {
+			$this->assertSame( 'bar', get_term_meta( $t, 'foo', true ) );
+		}
+
+		$this->assertSame( $num_queries, $wpdb->num_queries );
+	}
+
+	/**
+	 * @ticket 36932
+	 */
+	public function test_termmeta_cache_should_be_primed_when_fields_is_ids() {
+		global $wpdb;
+
+		register_taxonomy( 'wptests_tax', 'post' );
+		$terms = self::factory()->term->create_many( 3, array( 'taxonomy' => 'wptests_tax' ) );
+		add_term_meta( $terms[0], 'foo', 'bar' );
+		add_term_meta( $terms[1], 'foo', 'bar' );
+		add_term_meta( $terms[2], 'foo', 'bar' );
+
+		$p = self::factory()->post->create();
+		wp_set_object_terms( $p, $terms, 'wptests_tax' );
+
+		$found = wp_get_object_terms( $p, 'wptests_tax', array(
+			'update_term_meta_cache' => true,
+			'fields' => 'ids',
+		) );
+
+		$num_queries = $wpdb->num_queries;
+
+		foreach ( $terms as $t ) {
+			$this->assertSame( 'bar', get_term_meta( $t, 'foo', true ) );
+		}
+
+		$this->assertSame( $num_queries, $wpdb->num_queries );
+	}
+
 	/**
 	 * @ticket 10142
 	 */