Laravel migration - Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails

Question

I am trying to run a migration for a table inventories that I have created with this migration:

Schema::         


        

Answer 1

had the same problem. fixed it by adding nullable to field

Schema::create('table_name', function (Blueprint $table) {
    ...
    $table->integer('some_id')->unsigned()->nullable();
    $table->foreign('some_id')->references('id')->on('other_table');
    ...
});

note that after migration all existed rows will have some_id = NULL