Laravel migration: “Foreign key constraint is incorrectly formed” (errno 150)

Question

When migrating my DB, this error appears. Below is my code followed by the error that I am getting when trying to run the migration.

Code

Answer 1

Migrations must be created top-down.

First create the migrations for the tables who don't belong to anyone.

Then create the migrations for tables that belong to the previous.

---

Simplified answer to the table engine problem:

To set the storage engine for a table, set the engine property on the schema builder:

Schema::create('users', function ($table) {
    $table->engine = 'InnoDB';

    $table->increments('id');
});

From Laravel Docs: https://laravel.com/docs/5.2/migrations