Changing column in Laravel migration causes exception: Changing columns for table requires Doctrine DBAL

Question

I'm trying to change the max length of one of my columns in table reserves in one migration. The code looks like this:

public function up()
{
    //
    Schema::table('reserves', function($table){
        $table->string("mobile", 11)->change();
    });
}

But when running the migration via artisan, it throws an exception and says:

[RuntimeException] Changing columns for table "reserves" requires Doctrine DBAL; install "doctrine/dbal".

What is the problem and how can I solve it?

Answer 1

The problem was solved by executing the following command on the root directory of the framework:

composer require doctrine/dbal

Answer 2

add to composer.json

"require": {
        ...
        "doctrine/dbal": "*"
    },

run "composer update" command