Ensure that id_base is defined on widget form prototypes

westonruter · westonruter · commit 5d7ccb03db59 · 2017-02-13T23:39:37.000-08:00
diff --git a/js/widget-form.js b/js/widget-form.js
@@ -40,6 +40,10 @@ wp.widgets.Form = (function( api, $, _ ) {
 		initialize: function initialize( properties ) {
 			var form = this;
 
+			if ( ! form.id_base ) {
+				throw new Error( 'Missing id_base' );
+			}
+
 			_.extend( form, getValidatedFormProperties( form.config, properties ) );
 
 			form.setting = form.model; // @todo Deprecate 'setting' name in favor of 'model'?
diff --git a/php/class-wp-adapter-js-widget.php b/php/class-wp-adapter-js-widget.php
@@ -87,6 +87,11 @@ public function enqueue_control_scripts() {
 			wp_json_encode( $this->id_base ),
 			wp_json_encode( $this->get_form_config() )
 		) );
+		wp_add_inline_script( $handle, sprintf(
+			'wp.widgets.formConstructor[ %s ].prototype.id_base = %s;',
+			wp_json_encode( $this->id_base ),
+			wp_json_encode( $this->id_base )
+		) );
 	}
 
 	/**
