custom error in graphql server

server.js

@@ -87,6 +87,13 @@ app.use('/login', cors(), (req, res)=>{
    context: {
      request: req,
      acl: acl
+   },
+   formatError(error){
+     return {
+       message: error.message,
+       details: error.originalError.errors,
+       path: error.path
+     };
    }
  })));
 

utils/errors.js

@@ -0,0 +1,26 @@
+
+class customArrayError extends Error {
+  constructor(errors_array, message){
+    super();
+    this.message = message;
+    this.errors = errors_array;
+  }
+}
+
+class otherError extends Error {
+  constructor(oneError,message){
+    super();
+    this.message = message;
+    this.detail = oneError;
+  }
+}
+
+handleError = function(error){
+  if(error.name === "SequelizeValidationError"){
+      throw new customArrayError(error.errors, "Validation error");
+  }else{
+      throw new Error(error)
+  }
+}
+
+module.exports = { handleError}