How to remove primary constraint in a Laravel migration

Question

I had a migration with the following constraint:

$table->uuid('id')->primary();

is it possible to remove this primary() constraint in a following migration? I tried this:

$table->uuid('id')->change();

but it doesn't work. What's the recommended approach?

Answer 1

try dropPrimary method :

  $table->dropPrimary('id');

this will drop only the key constraint not the column

Answer 2

$table->dropPrimary( 'id' );

参考： https : //laravel.com/docs/5.0/schema#dropping-indexes