Can't add foreign key Laravel - php

Question

I have 2 tables (regions & categories) , I wanted to have a foreign key in regions table this is my migration file :
public function up()
{
Schema::create('regions', function (Blueprint $table) {
$table->engine = 'InnoDB';
$table->increments('id');
$table->string('nom');
$table->text('description');
$table->integer('vote');
$table->string('securite');
$table->integer('idCat')->unsigned()->change();
$table->foreign('idCat')->references('idCat')->on('categories');
$table->timestamps();
});
}
the table 'categorie' looks like this :
public function up()
{
Schema::create('categories', function (Blueprint $table) {
//$table->engine = 'InnoDB';
$table->increments('idCat');
$table->String('description');
$table->timestamps();
});
}
But I got this error : Syntax error or access violation: 1072 Key column 'idCat'
doesn't exist in table (SQL: alter table regions add constraint regions_
idcat_foreign foreign key (idCat) references categories (idCat))
Canyou help me please ?

Answer 1

Make sure you get rid of the change(), the column is not there yet.. The following code works perfectly for me...
<?php
use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;
class Test extends Migration
{
/**
* Run the migrations.
*
* #return void
*/
public function up()
{
Schema::create('categories', function (Blueprint $table) {
//$table->engine = 'InnoDB';
$table->increments('idCat');
$table->String('description');
$table->timestamps();
});
Schema::create('regions', function (Blueprint $table) {
$table->engine = 'InnoDB';
$table->increments('id');
$table->string('nom');
$table->text('description');
$table->integer('vote');
$table->string('securite');
$table->integer('idCat')->unsigned();
$table->foreign('idCat')->references('idCat')->on('categories');
$table->timestamps();
});
}
/**
* Reverse the migrations.
*
* #return void
*/
public function down()
{
Schema::drop('regions');
Schema::drop('categories');
}
}