Fix:Changing author name not updating library item metadata files #3060

server/models/BookAuthor.js

@@ -23,6 +23,20 @@ class BookAuthor extends Model {
     })
   }
 
+  /**
+   * Get number of books for author
+   *
+   * @param {string} authorId
+   * @returns {Promise<number>}
+   */
+  static getCountForAuthor(authorId) {
+    return this.count({
+      where: {
+        authorId
+      }
+    })
+  }
+
   /**
    * Initialize model
    * @param {import('../Database').sequelize} sequelize