Validate Parameters as a JSON String in Laravel

Question

Front End Part

The parameters are being sent like this:

Laravel Request

class CarCreateRequest extends FormRequest
{
    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */
    public function authorize()
    {
        //TODO: Define authorization logic, possibly a middleware
        return true;
    }  

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules()
    {
        return [
            'car.name' => 'present|required'
        ];
    }
}

Real Problem

The request class always validates to false. I checked the Validating Array section, but it looks like this works sending parameters like this:

car[name]=Spidey Mobile

However, I need to send this data stringified using JSON.stringify().

Is there a workaround for this? It looks like dot notation isn't working since this is a JSON string rather than an array. I've tried modifying the request data before being evaluated, but I haven't found anything that works for Laravel 5.7.

how did you modify the request data before being evaluated? That would be your best bet. json_decode your request and set as the validation data. — CUGreen
– CUGreen, Commented Dec 4, 2018 at 3:17
car: {"name": "Spidey Mobile"} does not seem like a valid json format. {"car": {"name": "Spidey Mobile"}} is. — Voyowsky
– Voyowsky, Commented Dec 4, 2018 at 10:20
Just as a side note, you don't need present and required in your validation as required alone will check that the field is present, as well as it not being empty. — John Halsey
– John Halsey, Commented Dec 4, 2018 at 13:47
@CUGreen I used json_decode within the ValidationData method but it looks like it's no longer available for 5.7. It's not changing anything at all — Luis Deras
– Luis Deras, Commented Dec 4, 2018 at 21:06

Luis Deras · Accepted Answer · 2018-12-04 22:02:04Z

Here's the solution, I used both the sanitize and validator method within the request in order to change the request data before being evaluated.

class CarCreateRequest extends FormRequest
{
    /**
    * Determine if the user is authorized to make this request.
    *
    * @return bool
    */
    public function authorize()
    {
        //TODO: Define authorization logic, possibly a middleware
        return true;
    }  

    public function validator($factory)
    {
    return $factory->make(
        $this->sanitize(), $this->container->call([$this, 'rules']), $this->messages()
    );
    }

    public function sanitize()
    {
        $this->merge([
            'car' => json_decode($this->input('car'), true)
        ]);
        return $this->all();
    }

    /**
    * Get the validation rules that apply to the request.
    *
    * @return array
    */
    public function rules()
    {
        return [
            'car.name' => 'present|required'
        ];
    }
}

The json_decode will transform the JSON string into an array that can be validated by Laravel.

CUGreen · Accepted Answer · 2018-12-05 23:44:42Z

5

You should just be able to override the validationData method in your Request like this:

protected function validationData()
{
    $this->merge(['car', json_decode($this->car)]); // or what ever your request value is.
    return $this->all();
}

answered Dec 5, 2018 at 23:44

CUGreen

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1 Comment

CUGreen Over a year ago

I'm sure that this method is there for a reason? Are you sure you are Casting your request to CarCreateRequest in your controllers store method? Try and dd($this->all()); in validationData() to make sure it is passing through and returning the correct data.

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