Fix: Calling select( 'core/edit-site' ).getCurrentTemplateTemplatePar…

…ts() selector throws an error.

packages/edit-site/src/store/selectors.js

@@ -243,11 +243,20 @@ export function isSaveViewOpened( state ) {
 /**
  * Returns the template parts and their blocks for the current edited template.
  *
+ * @deprecated
  * @param {Object} state Global application state.
  * @return {Array} Template parts and their blocks in an array.
  */
 export const getCurrentTemplateTemplateParts = createRegistrySelector(
 	( select ) => () => {
+		deprecated(
+			`select( 'core/edit-site' ).getCurrentTemplateTemplateParts()`,
+			{
+				since: '6.7',
+				version: '6.9',
+				alternative: `select( 'core/block-editor' ).getBlocksByName( 'core/template-part' )`,
+			}
+		);
 		return unlock(
 			select( editorStore )
 		).getCurrentTemplateTemplateParts();

packages/editor/src/store/private-selectors.js

@@ -26,6 +26,8 @@ import {
 	__experimentalGetDefaultTemplatePartAreas,
 } from './selectors';
 import { getEntityActions as _getEntityActions } from '../dataviews/store/private-selectors';
+import { getFilteredTemplatePartBlocks } from './utils/get-filtered-template-parts';
+import { TEMPLATE_PART_POST_TYPE } from './constants';
 
 const EMPTY_INSERTION_POINT = {
 	rootClientId: undefined,
@@ -160,3 +162,30 @@ export const hasPostMetaChanges = createRegistrySelector(
 export function getEntityActions( state, ...args ) {
 	return _getEntityActions( state.dataviews, ...args );
 }
+
+/**
+ * Returns the template parts and their blocks for the current edited template.
+ * This selector is deprecated and not used on the codebase, was just kept because
+ * it is called inside select( 'core/edit-site' ).getCurrentTemplateTemplateParts()
+ * which is also deprecated.
+ *
+ * @deprecated
+ * @param {Object} state Global application state.
+ * @return {Array} Template parts and their blocks in an array.
+ */
+export const getCurrentTemplateTemplateParts = createRegistrySelector(
+	( select ) => () => {
+		const templateParts = select( coreStore ).getEntityRecords(
+			'postType',
+			TEMPLATE_PART_POST_TYPE,
+			{ per_page: -1 }
+		);
+
+		const clientIds =
+			select( blockEditorStore ).getBlocksByName( 'core/template-part' );
+		const blocks =
+			select( blockEditorStore ).getBlocksByClientId( clientIds );
+
+		return getFilteredTemplatePartBlocks( blocks, templateParts );
+	}
+);