Create associated records in model after create

Question

I have a model, MyModel, which should, after it is created, created associated records of type MyAssociation. I need to run code like the below after a create on the MyModel:

myass = MyAssociation.new
myass.mymodel_id = self.id
myass.save

What is the best method to accomplish this?

score 2 · Answer 1 · answered May 28 '15 at 20:17

2

You're going to want to use Rails callbacks, in this case after_create which will execute after successful creation of the original object. Something like this:

class MyModel

  after_create :create_associations

  def create_associations
    myass = MyAssociation.new
    myass.mymodel_id = self.id
    myass.save
  end
end

answered May 28 '15 at 20:17

MCBama

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18

When the save is run in this case, it doesn't seem to save to the database. – steventnorris May 28 '15 at 20:18
@steventnorris well I don't know what kind of validations your association model has, but if it's not saving there's a chance a validation is failing. try saving with a bang, `myass.save!` and see if it pops an error – MCBama May 28 '15 at 20:19
I have tried that, no change – steventnorris May 28 '15 at 20:37

Create associated records in model after create

1 Answers1