unique_with Validator Rule For Laravel

This package contains a variant of the validateUnique rule for Laravel, that allows for validation of multi-column UNIQUE indexes.

Installation

Install the package through Composer.

Laravel 4

On the command line:

composer require felixkiss/uniquewith-validator:1.*

Laravel 5

On the command line:

composer require felixkiss/uniquewith-validator:2.*

Configuration

Add the following to your providers array in config/app.php:

'providers' => array(
    // ...

    'Felixkiss\UniqueWithValidator\UniqueWithValidatorServiceProvider',
),

Usage

Use it like any Validator rule:

$rules = array(
    '<field1>' => 'unique_with:<table>,<field2>[,<field3>,...,<ignore_rowid>]',
);

See the Validation documentation of Laravel.

Specify different column names in the database

If your input field names are different from the corresponding database columns, you can specify the column names explicitly.

e.g. your input contains a field 'last_name', but the column in your database is called 'sur_name':

$rules = array(
    'first_name' => 'unique_with:users, middle_name, last_name = sur_name',
);

Example

Pretend you have a users table in your database plus User model like this:

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;

class CreateUsersTable extends Migration {

    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('users', function(Blueprint $table) {
            $table->increments('id');

            $table->timestamps();

            $table->string('first_name');
            $table->string('last_name');

            $table->unique(array('first_name', 'last_name'));
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::drop('users');
    }

}

<?php

class User extends Eloquent { }

Now you can validate a given first_name, last_name combination with something like this:

Route::post('test', function() {
    $rules = array(
        'first_name' => 'required|unique_with:users,last_name',
        'last_name' => 'required',
    );

    $validator = Validator::make(Input::all(), $rules);

    if($validator->fails())
    {
        return Redirect::back()->withErrors($validator);
    }

    $user = new User;
    $user->first_name = Input::get('first_name');
    $user->last_name = Input::get('last_name');
    $user->save();

    return Redirect::home()->with('success', 'User created!');
});

You can also specify a row id to ignore (useful to solve unique constraint when updating)

This will ignore row with id 2

$rules = array(
    'first_name' => 'required|unique_with:users,last_name,2',
    'last_name' => 'required',
);

To specify a custom column name for the id, pass it like

$rules = array(
    'first_name' => 'required|unique_with:users,last_name,2 = custom_id_column',
    'last_name' => 'required',
);

You can also set additional clauses. For example, if your model uses soft deleting then you can use the following code to select all existing rows but marked as deleted

$rules = array(
    'first_name' => 'required|unique_with:users,last_name,deleted_at,2 = custom_id_column',
    'last_name' => 'required',
);

Extending the Laravel Validator

For simple validation rules that don't need translator or custom messages:

Validator::extend('foo_bar', function($attribute, $value, $parameters)
{
    return ($attribute == 'foo' && $value == 'bar');
});

For more sophisticated rules:

class CustomValidator extends Felixkiss\UniqueWithValidator\ValidatorExtension
{
    public function validateOnlyApple($attribute, $value, $parameters)
    {
        // $this->translator, $this->messages, etc. available
        return ($attribute == 'company' && $value == 'apple');
    }
}

Validator::resolver(function($translator, $data, $rules, $messages)
{
    return new CustomValidator($translator, $data, $rules, $messages);
});

License

MIT