Filtering by categories using MetaQuery in GraphQl

[FuturisticWizard]

Hello I have problem with filtering inside metaQuery . I asked a question on discord : https://discord.com/channels/838854618406453300/918553064703680542/1292095799169126461

I cant target categories/name. How to do that ? I beg for help !!!

[SamuelHadsall]

@FuturisticWizard so categories is the meta_key that is stored in the post_meta table correct? Is this an acf field? If that's the case, to be honest I would just use a hook and create your own custom where clause on your blogposts node

register_graphql_field('RootQueryToRatingReviewConnectionWhereArgs');

Below I had to add a stateMoveFrom and a cityMovedFrom which are acf fields on custom post type. Then you can build out a meta_query

			// Register the custom where argument for the stateMovedFrom field
			register_graphql_field( 'RootQueryToRatingReviewConnectionWhereArgs', 'stateMovedFrom', [
				'type' => 'String',
				'description' => __( 'Filter rating reviews by stateMovedFrom ACF field', $this->plugin_name ),
			]);
		
			// Register the custom where argument for the cityMovedFrom field
			register_graphql_field( 'RootQueryToRatingReviewConnectionWhereArgs', 'cityMovedFrom', [
				'type' => 'String',
				'description' => __( 'Filter rating reviews by cityMovedFrom ACF field', $this->plugin_name ),
			]);
		
			// Modify the query args for the ratingReviews connection
			add_filter( 'graphql_post_object_connection_query_args', function( $query_args, $source, $input, $context, $info ) {
				// Check if this filter is applied to the desired post type connection
				if ( isset( $info->fieldName ) && 'ratingReviews' === $info->fieldName ) {
		
					// Check if the stateMovedFrom custom where argument is set
					if ( ! empty( $input['where']['stateMovedFrom'] ) ) {
						$meta_query = [
							'key' => 'state_moved_from', // The ACF field name for state
							'value' => $input['where']['stateMovedFrom'], // The value to match
							'compare' => '=' // Comparison operator
						];
		
						// If a meta query already exists, add to it. Otherwise, create one.
						if ( isset( $query_args['meta_query'] ) ) {
							$query_args['meta_query'][] = $meta_query;
						} else {
							$query_args['meta_query'] = [ $meta_query ];
						}
					}
		
					// Check if the cityMovedFrom custom where argument is set
					if ( ! empty( $input['where']['cityMovedFrom'] ) ) {
						$meta_query = [
							'key' => 'city_moved_from', // The ACF field name for city
							'value' => $input['where']['cityMovedFrom'], // The value to match
							'compare' => '=' // Comparison operator
						];
		
						// If a meta query already exists, add to it. Otherwise, create one.
						if ( isset( $query_args['meta_query'] ) ) {
							$query_args['meta_query'][] = $meta_query;
						} else {
							$query_args['meta_query'] = [ $meta_query ];
						}
					}
				}
		
				return $query_args;
			}, 10, 5 );
		});```