Can I Use Rails Migration Commands to Create Constraints?

There are various commands that you can use in migrations a to do various things. And there exist rails, migration commands to create constraints. O understand that you can invoke one of these rails commands to create, for example, a foreign key. That command can take an argument that says, skip the validations on this constraint. I have that right? Ah, well, let me. So i did pull up the documentation for the check constraint. But we don't have to use the foreign key constraint example. We could use any kind of constraint. Ok, we'll talk about it. Then il s halarity, have that example ready to go.