Laravel 5.5 conditional form request validation rule on update - php

Question

I created a validation rule for the image form.
It works fine on store method but I do not want the image field to be required on update because I may only update the title for example.
class ImageRequest extends Request
{
/**
* Rules array
*/
protected $rules = [
'title' => 'required|string|between:3,60',
'alt' => 'sometimes|string|between:3,60',
'image' => 'required|image|max:4000|dimensions:min_width=200,min_height=200',
];
/**
* Determine if the user is authorized to make this request.
*
* #return bool
*/
public function authorize()
{
return true;
}
/**
* Get the validation rules that apply to the request.
*
* #return array
*/
public function rules()
{
return $this->rules;
}
}
For unique validation we can add custom query conditions:
'email' => Rule::unique('users')->ignore($user->id, 'user_id')
or
'email' => Rule::unique('users')->where(function ($query) {
return $query->where('account_id', 1);
})
Is it a clean way to achieve something similar for required?
Apply required only for new images.

Answer 1

you Can use switch statement inside rule
public function rules()
{
switch ($this->method()) {
case 'GET':
case 'DELETE': {
return [];
}
case 'POST': {
return [
'first_name'=>'required',
'last_name'=>'required',
'email'=>'required|email|unique:users,email,'.$this->id,
'password'=>'',
'dob'=>'required',
'phone_one'=>'required',
'phone_two'=>'required',
//'user_role'=>'required',
// 'profile_image'=>'required'
];
}
case 'PUT':
case 'PATCH': {
return [
];
}
default:break;
}
Also you can use condtion like on update yuo have id so based on that you can check whether its update or insert since on insert you dont have id so

Answer 2

Create another class that extends the Request class, DI that into your update controller action
class UpdateImageRequest extends Request
{
/**
* Rules array
*/
protected $rules = [
'title' => 'required|string|between:3,60',
'alt' => 'sometimes|string|between:3,60'
];
/**
* Determine if the user is authorized to make this request.
*
* #return bool
*/
public function authorize()
{
return true;
}
/**
* Get the validation rules that apply to the request.
*
* #return array
*/
public function rules()
{
return $this->rules;
}
}

Answer 3

much better way is to use nullable in Laravel 5.5 validations
Ref Docs
The field under validation may be null. This is particularly useful
when validating primitive such as strings and integers that can
contain null values.
class ImageRequest extends Request
{
/**
* Rules array
*/
protected $rules = [
'title' => 'required|string|between:3,60',
'alt' => 'nullable|string|between:3,60',
'image' => 'nullable|image|max:4000|dimensions:min_width=200,min_height=200',
];
/**
* Determine if the user is authorized to make this request.
*
* #return bool
*/
public function authorize()
{
return true;
}
/**
* Get the validation rules that apply to the request.
*
* #return array
*/
public function rules()
{
return $this->rules;
}
}
However I have used recently with image and it worked like charm for me. Give it a try!

Answer 4

The simplest way in this case in the other way. By default have rules for update and if it's store add required like so:
class ImageRequest extends Request
{
/**
* Rules array
*/
protected $rules = [
'title' => 'required|string|between:3,60',
'alt' => 'sometimes|string|between:3,60',
'image' => 'image|max:4000|dimensions:min_width=200,min_height=200',
];
/**
* Determine if the user is authorized to make this request.
*
* #return bool
*/
public function authorize()
{
return true;
}
/**
* Get the validation rules that apply to the request.
*
* #return array
*/
public function rules()
{
$rules = $this->rules;
if ($this->isMethod('POST')) {
$rules['image'] = 'required|' . $rules['image']
}
return $rules;
}
}

Answer 5

I found a solution.
I renamed image into file.
The route is homestead.app/images/1 on update and homestead.app/images on store so the $image property will be $this->image = 1 on update and $this->image = null on store.
class ImageRequest extends Request
{
/**
* Rules array
*/
protected $rules = [
'title'=> 'required|string|between:3,60',
'alt' => 'sometimes|string|between:3,60',
'file' => [
'image',
'max:4000',
'dimensions:min_width=200,min_height=200',
],
];
/**
* Determine if the user is authorized to make this request.
*
* #return bool
*/
public function authorize()
{
return true;
}
/**
* Get the validation rules that apply to the request.
*
* #return array
*/
public function rules()
{
$this->rules['file'][] = is_null($this->image) ? 'required' : 'sometimes';
return $this->rules;
}
}