On Mon, Jul 18, 2011 at 10:47 PM, sreid <[email protected]> wrote:
> My problem occurs when trying to modify a parent record from a child, > using an after_create callback in the child is created (they have a > has_many / belongs_to association). > > After some more testing (checking object ids), I can get a test to > pass if I use (e.g.) : > 1) Child.create(:parent => parent) > but not > 2) parent.childs.create > > 1) should create a record with the same attributes as the record created in 2). If this isn't happening then you need to check your associations. Can you share some code regarding the associations? I'm sure you're just giving an example above but parent.childs should be parent.children. > I suspect that in 1), the child gets the original parent object passed > in, but in the second, it only gets the id, and, if needed, rails > creates a temp parent object from the id, which means I'm updating the > temp parent object (and the database if it is saved!), not the > original parent object in the parent.childs.create call, as I'd > expected. For the second way to work, I need always add a > parent.reload after a parent.childs.create. > > Is this how rails/activerecord always works ? Is it a bug ? > > Also, I did discover a way to find all objects related to a given > record > ObjectSpace.each_object(parent) do |temp_parent| if temp_parent.id > == parent.id ... > , but it's too slow. > > For now, I just have to remember to always use the > Child.create(:parent => parent) form, but unless, someone has another > suggestion, I'll likely migrate to rails 3.1 soon, to get identity > map. For me, this should give more intuitive behaviour for > activerecord. > > -- > You received this message because you are subscribed to the Google Groups > "Ruby on Rails: Talk" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/rubyonrails-talk?hl=en. > > -- ------------------------------------------------------------- visit my blog at http://jimlabs.heroku.com -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
