Rails - Building a nested model

Question

Project (id)
Permission (project_id, user_id)

When trying to save a project, I get the following error: ActiveRecord::RecordNotSaved (You cannot call create unless the parent is saved):

Controller:

@project = current_user.projects.new(:name => params[:project][:name])
@project.permissions.build(:user_id => current_user.id)

respond_to do |format|
  if @project.save
  ......

Suggestions? Thansk

Sorry that should be @project. that was just a typo entering the question... — AnApprentice
– AnApprentice, Commented Feb 16, 2011 at 8:15

edgerunner · Accepted Answer · 2011-02-16 08:24:32Z

2

Try setting :autosave => true on your association

class Project < ActiveRecord::Base
  has_many :permissions, :autosave => true
  …

answered Feb 16, 2011 at 8:24

edgerunner

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Comments

Simon Perepelitsa · Accepted Answer · 2011-02-16 08:22:51Z

2

current_user.projects.new doesn't set user_id for a project, try to use current_user.projects.build instead.

answered Feb 16, 2011 at 8:22

Simon Perepelitsa

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2 Comments

ybakos Over a year ago

That would merely assign nil to the Project instance's user_id if current_user.id is nil.

Simon Perepelitsa Over a year ago

Now I know that #new and #build are aliases. So my answer is not true.

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