Laravel: Once Migrating, It doesn't Create Custom Primary Key Column into MySQL

Question

Here's the problem: I'm trying to generate a very very simple custom primary key (by overriding function getKey()) for my table Users. When I migrate the table, it says:

SQLSTATE[42000]: Syntax Error or Acccess Violation: 1072 Key Column 'uid' Doesn't Exist in Table (SQL: Alter Table 'users' Add Primary Key 'users_uid_primary'('uid'))

Thanks in advance for your suggestions and corrections.

EDIT: After migration, my table is created in MySQL but with no primary key column (in this case 'uid').

Schema:

public function up()
{
    Schema::create('users', function (Blueprint $table) {
        $table->primary('uid');
        $table->string('username');
        $table->string('password');
        $table->timestamps();
    });
}

Model:

class User extends Model
{
    protected $primaryKey = 'uid'; //emphasize that the primary key isn't 'id'
    protected $keyType = 'string'; //p.k. holds string values
    public $incrementing = false; //then p.k. must not auto increment it
    public $timestamps = false; //no need for this one

    public function getKey() {

        return "u".rand(1000, 9999)."r"; //return something like 'u2548r'

    }
}

Answer 1

You have to actually create the field ... you are setting a non existing field uid as the primary key.

You need to define the field as some type and add it the table. Blueprint@primary is setting an index (in general terms) not creating a field.