Rails Model find Where Not | Query where not

Question

I have a user model with optional twitter integration.

I've added a 'username' attribute that is only filled when a user has completed twitter authentication.

I want to find all users with the integration. What is the best way to find all objects where an attribute is something, or where it is not nil?

Answer 1

Rails4 / Rails 5 :

User.where.not(username: nil)

Rails 3:

User.where("username <> nil")

I would love to see other responses

Answer 2

你也可以在where语句中写sql：

User.where("username <> nil")

Answer 3

你可以执行简单的地方，如下所示不查询

Modal.where.not(name: "abc")