WP_REST_Posts_Controller::prepare_tax_query( array $args, WP_REST_Request $request ): array

3174	private function prepare_tax_query( array $args, WP_REST_Request $request ) {3175		$relation = $request['tax_relation'];3176 3177		if ( $relation ) {3178			$args['tax_query'] = array( 'relation' => $relation );3179		}3180 3181		$taxonomies = wp_list_filter(3182			get_object_taxonomies( $this->post_type, 'objects' ),3183			array( 'show_in_rest' => true )3184		);3185 3186		foreach ( $taxonomies as $taxonomy ) {3187			$base = ! empty( $taxonomy->rest_base ) ? $taxonomy->rest_base : $taxonomy->name;3188 3189			$tax_include = $request[ $base ];3190			$tax_exclude = $request[ $base . '_exclude' ];3191 3192			if ( $tax_include ) {3193				$terms            = array();3194				$include_children = false;3195				$operator         = 'IN';3196 3197				if ( rest_is_array( $tax_include ) ) {3198					$terms = $tax_include;3199				} elseif ( rest_is_object( $tax_include ) ) {3200					$terms            = empty( $tax_include['terms'] ) ? array() : $tax_include['terms'];3201					$include_children = ! empty( $tax_include['include_children'] );3202 3203					if ( isset( $tax_include['operator'] ) && 'AND' === $tax_include['operator'] ) {3204						$operator = 'AND';3205					}3206				}3207 3208				if ( $terms ) {3209					$args['tax_query'][] = array(3210						'taxonomy'         => $taxonomy->name,3211						'field'            => 'term_id',3212						'terms'            => $terms,3213						'include_children' => $include_children,3214						'operator'         => $operator,3215					);3216				}3217			}3218 3219			if ( $tax_exclude ) {3220				$terms            = array();3221				$include_children = false;3222 3223				if ( rest_is_array( $tax_exclude ) ) {3224					$terms = $tax_exclude;3225				} elseif ( rest_is_object( $tax_exclude ) ) {3226					$terms            = empty( $tax_exclude['terms'] ) ? array() : $tax_exclude['terms'];3227					$include_children = ! empty( $tax_exclude['include_children'] );3228				}3229 3230				if ( $terms ) {3231					$args['tax_query'][] = array(3232						'taxonomy'         => $taxonomy->name,3233						'field'            => 'term_id',3234						'terms'            => $terms,3235						'include_children' => $include_children,3236						'operator'         => 'NOT IN',3237					);3238				}3239			}3240		}3241 3242		return $args;3243	}