Update filterData for authors/series when added/removed

server/models/Author.js

@@ -83,6 +83,15 @@ class Author extends Model {
     })
   }
 
+  /**
+   * Check if author exists
+   * @param {string} authorId 
+   * @returns {Promise<boolean>}
+   */
+  static async checkExistsById(authorId) {
+    return (await this.count({ where: { id: authorId } })) > 0
+  }
+
   /**
    * Initialize model
    * @param {import('../Database').sequelize} sequelize 

server/models/Series.js

@@ -75,6 +75,15 @@ class Series extends Model {
     })
   }
 
+  /**
+   * Check if series exists
+   * @param {string} seriesId 
+   * @returns {Promise<boolean>}
+   */
+  static async checkExistsById(seriesId) {
+    return (await this.count({ where: { id: seriesId } })) > 0
+  }
+
   /**
    * Initialize model
    * @param {import('../Database').sequelize} sequelize