Laravel: How to set the Primary Key and Foreign Key to string

Question

I\'m not using the auto increment for the id instead i\'m using the 32 char unique id. So when i create a relationship and query, im getting a null because my FK expecting i

Answer 1

In newer versions of Laravel (Im using 6.5.1) you have to set up the key type to string (By default PK type is set to integer)

Following the example of the question:

class User extend Eloquent {
    public $incrementing = false; 
    public $keyType = 'string';
}

class Reservation extend Eloquent {
    public $incrementing = false;
    public $keyType = 'string'; 
}

You can see the example in the laravel documentation

Answer 2

First, with innoDB you could make those foreing keys without problem

InnoDB allows a foreign key constraint to reference a non-unique key. This is an InnoDB extension to standard SQL.

Mabe you have your tables wrong, try this

For Reservations

    Schema::create('reservations', function($table)
    {
        $table->engine = 'InnoDB';
        $table->string('id', 32)->index();
        $table->string('name', 128);
        $table->string('user_id', 32)->references('id')->on('users');
        $table->timestamps();
    });

for users

    Schema::create('users', function($table)
    {
        $table->engine = 'InnoDB';
        $table->string('id', 32)->index();
        $table->string('name', 128);
        $table->timestamps();
    });

then you need to create the relationship in reservations

public function user(){
    return $this->belongsTo('User', 'user_id');
}

and now when you search

$reservations = Reservation::with('user')->where('user_id', '=', '22beb4892ba944c8b1895855e1d4d1ad')->get();

it must work! i've tested this code.