Laravel nullable validation rule not working

Explanation:

Unfortunately, it seems that nullable is only valid with certain other validations.

For example: 'act_post_code' => 'nullable|integer' will give you the error: "validation.integer"

However, 'act_post_code' => 'nullable|date' works fine.

Fix:

As a work around for these validations, you can make them dynamic. For example, before the validator:

$act_post_code_rules = $request->act_post_code ? 'integer' : '';

then, within the validate:

'act_post_code' => $act_post_code_rules

In order to validate the field act_post_code which can be either be of type integer or nullable, you can try out the following :

• When declaring in the migration ,the Schema of the table where there is the column act_post_code declare the column like $table->integer('act_post_code')->nullable();
• This one might just work for you to validate 'act_post_code' =>'sometimes|nullable|integer'

One can die and dump request parameters and check whether the actual value is null or "null" (in string). Sometimes when submitting a form via javascript we use FormData() to append data to the form, in those scenarios it may send a null value as in string type "null"

array:5 [
  "firstName" => "Kaustubh"
  "middleName" => "null" // null as string
  "lastName" => "Bagwe"
  "contactNumber" => null // null value
  "photo" => null
  "_method" => "PUT"
]

Open your migration file and make the this field as nullable

For e.g

Schema::create('your_table_name', function (Blueprint $table) {
    $table->integer('act_post_code ')->nullable();    
});

Make sure it is present in your model file in the fillable section

protected $fillable = ['act_post_code'];

After Some Test I found that nullable rule only work if only the data that we pass really was a null data.
so in my test case i use the validation rule like this :
"counter" => "nullable|numeric"
and in the blade file, I use Form::text('counter','') as element to input my data.

Then i use it with few test case:

1. When I input the counter data with a non-numeric value it will response with error:
   "the counter must be a number".
2. When I input the counter data with a numeric value it will pass the validation test.
3. When I not input any data to the counter it will pass the validation test.

so i check the data manually using dd($request_data)or if you using ajax just return $request_data and print it using console.log("data") like:

$.ajax({
type:'POST',
data:{_token:"{{ csrf_token() }}",
    counter:$('input[name="counter"]').val()
},success:function(data){
  console.log(data);   
 }
});

and found out that when input field is emptied it will give the null value.