使用Laravel迁移处理外键的正确方法？

Question

I'm a newbie to laravel and migrations, and I can't seem to figure out the correct way to set up a foreign key.

Schema::create('sights', function (Blueprint $table) {
        $table->increments('id');
        $table->string('name');
        $table->text('description');
        $table->integer('contact_id');
        $table->integer('media_id');
        $table->timestamps();
    });

    Schema::table('sights', function($table) {
        $table->foreign('contact_id')->references('id')->on('contacts');
        $table->foreign('media_id')->references('sight_id')->on('sightMedia');
    });

If it's not clear, "contact_id" is a foreign key that's supposed to reference the column "id" in the table called "contacts", and "media_id" references the column "sight_id" in the intermediary table "sightMedia".

The error it gives me when I try to migrate is the following:

EDIT: This is the users table, it's second in the line of migrations so I suppose that's where the migrations stop and report an error.

        Schema::create('users', function (Blueprint $table) {
        $table->increments('id');
        $table->string('email');
        $table->string('firstName');
        $table->string('lastName');
        $table->string('password');
        $table->string('facebook');
        $table->integer('score_id')->unsigned();
        $table->integer('role_id')->unsigned();
        $table->timestamps();
    });

    Schema::table('users', function ($table) {
        $table->foreign('score_id')->references('id')->on('scores');
        $table->foreign('role_id')->references('id')->on('roles');
    });

Thank you in advance.