Ajax 成功事件中显示 Laravel 验证错误

Question

When I submit an Ajax request and I know that the data should fail, I am receiving the error response within the success event instead of the fail event.

I need the response from Laravel to be sent to the Ajax fail event, as I will be building custom functionality for when the request fails to process.

I've tried all sorts to try and get it to work, but I'm at a complete loss as to why it's returning into the Success event. I must be being daft or something!

My Function within the Controller:

    public function add_company(Request $request)
    {

        /**
         * Validate the Add Company request
         */
        $validator = \Validator::make($request->all(), [
            'name' => 'required',
            'sector' => 'required',
            'number' => 'required',
            'email' => 'required',
        ]);

        if ($validator->fails()) {
            return response()->json(['error' => 'Something went wrong']);
        }

        DB::table('companies')->insert([
            'user_id' => Auth::id(), 
            'company_number' => $request->company_number,
            'name' => $request->name,
            'sector' => $request->sector,
            'number' => $request->number,
            'email' => $request->email,
            'address_1' => $request->address_line_1,
            'address_2' => $request->address_line_2,
            'city' => $request->city,
            'postcode' => $request->postcode,
        ]);

        return response()->json(['success' => 'Company created successfully.']);

    }

My Ajax function:

$('[data-add-company]').on('submit', function(e) {
    e.preventDefault();
    let $this = $(this);
    let action = $this.attr('action');
    let method = $this.attr('method');

    var formData = $this.serialize();

    $.ajax({
        type: method,
        url: action,
        headers: {
            'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content'),
            'Access-Control-Allow-Origin': '*',
        },
        data: formData,
        success: function(data){
            console.log('success');
            console.log(data); // Fail messages appear here for some reason.
        },
        error: function(data) {
            console.log('error');
            console.log(data);
        },
    });
});

I've tried using data.success and data.error to get the correct message but they just come up as undefined when I key into them.

What should happen

1. The fail event should initiate when the validation fails and show the correct fail message from the controller.
2. The success event should only contain the success message from the controller, once the request has been successfully validated.

Thanks in advance!

Answer 1

What seems to be happening is even though your request failed its validation in the controller its still returns a valid response which JQuery sees as a success , allowing it into the success callback on the frontend.

Try

        if ($validator->fails()) {
           return response()->json(["error" => "something went wrong"], 422);
        }

This should trigger the error callback.

You can also pass the errors back like this:

          return response()->json($validator->errors(), 422);

To get all the error messages on the frontend.

For further reading check out this jQuery error handling article .