422 Validation Error

Error Message

422 The given data was invalid.

Cause

The request data failed validation rules defined in Form Requests or inline validation. The response contains a JSON or session errors object.

Solution

Check the validation errors in the response. Review the rules in the Form Request. Ensure all required fields are present and valid.

Code Example

Fix

// Check validation errors
if ($errors = $request->session()->get('errors')) {
    $errors->getMessages();
}

// In Blade
@error('title')
    <span class="error">{{ $message }}</span>
@enderror

// In API response (automatic)
// {
//     "message": "The given data was invalid.",
//     "errors": {
//         "title": ["The title field is required."]
//     }
// }

Debugging Steps

Check the validation errors in the response
Review the Form Request rules() method
Verify all required fields are included
Check input data types match expected types
Test with dd($request->all()) to inspect input

Prevention

Write comprehensive tests for validation rules. Use custom error messages for clarity. Always check required fields and data types.