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Home/ Questions/Q 6330223
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Editorial Team
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Editorial Team
Asked: May 24, 20262026-05-24T17:49:58+00:00 2026-05-24T17:49:58+00:00

Given the following Thread belongs_to :user User has_many :threads, :through => :thread_members When I

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Given the following

Thread
   belongs_to :user

User
   has_many :threads, :through => :thread_members

When I do:

  @user.threads.create(:title => "hello")

In my Thread model I have a before_create, and in that method I and Rails.logger.info self.inspect which outputs:

#<Thread id: nil, user_id: nil, title: "hello" ...

Why is user_id not being assigned? Thanks

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  1. Editorial Team
    Editorial Team
    2026-05-24T17:49:58+00:00Added an answer on May 24, 2026 at 5:49 pm

    Check that the @user is already saved, the parent records must be saved before the children get their foreign keys set. Please show the controller code that loads that @user object.

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