active record: create record from parent object...

this is what I mean:

job has many docs. I want to create a doc, I can do:

@doc = Doc.new(params[:doc])

but I'd like to enforce the parent-child relationship, since I already know the job.. something like this:

@job.docs.new(params[:doc])

so that the job_id field gets ignored and only the @job object matters...

does it make any sense?

From stackoverflow luca

• You should be able to use the build method:

  @job.docs.build(params[:doc])
  

  See the has_many api documentation or the Rails Guide for associations for a list of methods available on the collection.

  From Greg Campbell

• As long as you've specified the relationship in the model, Job will automagically have a build method:

  @job.docs.build(params[:doc])
  

  From Pesto

• # initialize the object
  @job.docs.build(params[:doc])
  # create the object
  @job.docs.create(params[:doc])
  

  Rafe : To be clear, the difference is that "create" goes ahead and inserts the new object into the database.
  From Simone Carletti