laravel migration best way to add foreign key

Question

Simple question: I\'m new to Laravel. I have this migration file:

Schema::create(\'lists\', function(Blueprint $table) {
    $table->increments(\'id\'); 
         


        

Answer 1

$table->integer('user_id')->unsigned();
$table->foreign('user_id')->references('id')->on('users');

In this example, we are stating that the user_id column references the id column on the users table. Make sure to create the foreign key column first! The user_id column is declared unsigned because it cannot have negative value.

You may also specify options for the "on delete" and "on update" actions of the constraint:

$table->foreign('user_id')
      ->references('id')->on('users')
      ->onDelete('cascade');

To drop a foreign key, you may use the dropForeign method. A similar naming convention is used for foreign keys as is used for other indexes:

$table->dropForeign('posts_user_id_foreign');

If you are fairly new to Laravel and Eloquent, try out the Laravel From Scratch series available on laracasts. It is a great guide for beginners.