数据库包含点（。）值时的跨数据库外键问题

Question

I am facing an issue to assign across cross-databases relationship in laravel migration because my database name contains a dot(.) value, My Database name is = "demo.local.com"

Schema::table('user_details', function(Blueprint $table)
        {
            $table->foreign('user_id')->references('id')
            ->on('`demo.local.com`.users')
            ->onUpdate('RESTRICT')->onDelete('RESTRICT');
        });

I am using that way but its return error like

MariaDB server version for the right syntax to use near '.`com```.`users` (`id`) on delete RESTRICT on update RESTRICT

So it's possible to assign a foreign key when the database name contains a dot(.) value?

Answer 1

I have found the solution by using DB raw query and it's working for me

Schema::table('user_details', function(Blueprint $table)
        {
            $table->foreign('user_id')->references('id')
            ->on(\DB::raw('`demo.local.com`.users'))
            ->onUpdate('RESTRICT')->onDelete('RESTRICT');
        });