Laravel 5.1 - General error: 1005 Can't create table (mysql) - php

Question

I'm using laravel to migrate some data, but i'm having this message below:
[Illuminate\Database\QueryException]
SQLSTATE[HY000]: General error: 1005 Can't create table 'heinz.#sql-1e83_8' (errno: 150) (SQL: alter table `funcionarios` add constraint funcionarios_supervisor_id_foreign foreign key (`supervis
or_id`) references `funcionarios` (`id`))
I tried a lot of thing, but didn't work.
Here is the code of the migration file. (the relevant part).
Schema::create('funcionarios', function (Blueprint $table) {
// $table->engine = 'InnoDB';
$table->increments('id');
$table->string('nome', 60);
$table->integer('matricula')->unsigned()->unique();
$table->bigInteger('pis_pasep')->unsigned()->nullable();
$table->date('data_admissao')->nullable();
$table->date('data_demissao')->nullable()->default(null);
$table->date('data_nascimento')->nullable();
$table->string('apelido', 20)->nullable();
$table->integer('supervisor_id')->nullable();
$table->integer('coordenador_id')->nullable();
$table->integer('gerente_id')->nullable();
$table->integer('diretor_id')->nullable();
$table->integer('sexo_id')->nullable();
$table->integer('setor_id')->nullable();
$table->integer('cargo_id');
$table->integer('turno_id')->nullable();
$table->timestamps();
});
Schema::table('funcionarios', function($table){
$table->foreign('supervisor_id')->references('id')->on('funcionarios');
$table->foreign('coordenador_id')->references('id')->on('funcionarios');
$table->foreign('gerente_id')->references('id')->on('funcionarios');
$table->foreign('diretor_id')->references('id')->on('funcionarios');
$table->foreign('sexo_id')->references('id')->on('sexos');
$table->foreign('setor_id')->references('id')->on('setores');
$table->foreign('cargo_id')->references('id')->on('cargos');
$table->foreign('turno_id')->references('id')->on('turnos');
});

Answer 1

All of your foreign keys must be unsigned
$table->integer('supervisor_id')->unsigned()->nullable();
$table->integer('coordenador_id')->unsigned()->nullable();
$table->integer('gerente_id')->unsigned()->nullable();
$table->integer('diretor_id')->unsigned()->nullable();
$table->integer('sexo_id')->unsigned()->nullable();
$table->integer('setor_id')->unsigned()->nullable();
$table->integer('cargo_id')->unsigned();
$table->integer('turno_id')->unsigned()->nullable();
(source: http://laravel.com/docs/4.2/schema#foreign-keys)

Answer 2

Without seeing your table structure, from your below query it could be that
both column id and supervisor_id doesn't match datatype and size. Make sure both datatype and size are same for both this column
Also, check if any other constraint with name funcionarios_supervisor_id_foreign already exists. If so, try providing a different name for the constraint.
alter table `funcionarios` add constraint funcionarios_supervisor_id_foreign
foreign key (`supervisor_id`) references `funcionarios` (`id`)

Answer 3

You get error code 1005 when there is a wrong primary key reference in your code. Here is what you can do to debug your code:
Make sure that your FK you are referring actually exists.
Make sure that you don't have typo. The case must be same too.
FK-linked fields must match definitions exactly.

Answer 4

The execution order of the migration files needs to be checked first. the referenced table migration should be done before refer it in integrity constains.