Laravel Validation unique/exists with different database connection - laravel

Question

In the documentation, I saw you could set a connection for the unique rule which is great. However, the exists doesn't seem to follow the same logic. Take this for example:
$rules = [
'username' => 'required|max:40|unique:user',
'name' => 'sometimes|required',
'email' => 'required|email|max:255|unique:int.user',
'password' => 'sometimes|required|confirmed|min:6',
'password_current' => 'sometimes|required'
];
The unique rule works GREAT in this instance. It uses my database connection called 'int' and calls the user table. HOWEVER, when the rules are reversed like so:
$rules['email'] = 'required|email|max:255|exists:int.user';
I got this error:
SQLSTATE[42S02]: Base table or view not found: 1146 Table 'int.user'
doesn't exist (SQL: select count(*) as aggregate from int.user where
email = haleybuggs6#gmail.com)
It's trying to call an int.user table instead of using the int database connection.
Is there a reason exists doesn't act the same way as unique? Thanks.

Answer 1

instead of using connection name you can try with straight Database name which is defined in "int" connection. faced similar problem and these way worked for me. like
$rules['email'] = 'required|email|max:255|exists:DB_Name.user';

Answer 2

You can use
'email' => 'exists:mysql2.users|required'
Where mysql2 is second database settings array in the database.php file

Answer 3

Try it.
$rules = [
'username' => 'required|max:40|unique:connection_name.user',
'name' => 'sometimes|required',
'email' => 'required|email|max:255|unique:connection_name.user',
'password' => 'sometimes|required|confirmed|min:6',
'password_current' => 'sometimes|required'
];

Answer 4

Ultimately for Laravel 5.6.* you need to look at an existing instance of the model you are trying to validate, or specify ...
{db_connection_name}.{schema_name}.{table_name}
... to ensure that you are looking at the proper table.
Validation Example
validate it...
<?php
// for instance...
// maybe auth user is in a different db
// = so you cannot validate with your default db connection
$default_user = Auth::user();
// pass the instance in order to allow Validator to qualify the proper connection/name
\App\Validation\User::validate($_POST, $default_user);
User Validation class
<?php
namespace App\Validation;
class User extends Validator
{
/**
* #param \Illuminate\Database\Eloquent\Model|string $mixed
* #param string $default
* #return string
*/
public static function table($mixed,$default='default_connection.app_schema.users_table')
{
if($mixed instanceof \Illuminate\Database\Eloquent\Model){
$table = $mixed->getConnectionName().'.'.$mixed->getTable();
} else {
if (! empty($mixed)) {
$table = $mixed;
} else {
$table = $default;
}
}
return $table;
}
/**
* validation to create a new user
*
* #param array $data
* #param \App\User|string $mixed
* #return array
* #throws \Illuminate\Validation\ValidationException
*/
public static function validate(array $data, $mixed='default_connection.app_schema.users_table'){
return Validator::validate($data,[
'username' => 'required|max:40|unique:'.self::table($mixed),
'name' => 'sometimes|required',
'email' => 'required|email|max:255|unique:'.self::table($mixed),
'password' => 'sometimes|required|confirmed|min:6',
'password_current' => 'sometimes|required'
]);
}
}

Answer 5

$default_connection = 'db_name';
$rules = [
'username' => 'required|max:40|unique:{$default_connection}.user',
'name' => 'sometimes|required',
'email' => 'required|email|max:255|unique:int.user',
'password' => 'sometimes|required|confirmed|min:6',
'password_current' => 'sometimes|required'
];