I've got a form that collects data for a parent and a number
of child records. I'm trying to update all the records and
then do one @parent.save to transactionally save the whole
bunch, but am having trouble.
My form gives me params[:parent] and params[:children]
The latter is a hash of hashes, each one containing the
info to find and fill out or modify one child.
The simplified version of the handler code is:
---------------------------------------
@parent = Parent.find(foo)
@parent.attributes = params[:parent]
params[:children].each_value do |child_hash|
child = Child.find(child_hash[:id])
child.attributes = child_hash
????????
end
if @parent.save
yay
end
---------------------------------------
The problem is that I need to know what goes at "????"
in order to associate the child objects with the parent such
that when I do the save, the children are updated as well.
I can't use:
@parent.children << child
because that immediately saves the child. I want to delay
the save until the transaction. On the other hand, if I put
nothing at all there, then the children's updates are not saved.
Thanks in advance.
-glenn
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