I have models:
Frame.rb
belongs_to :manufacturer, foreign_key: 'model'
accepts_nested_attributes_for :manufacturer, :reject_if => proc { |obj| obj.blank? }
When i try to create new Frame with existing manufacturer i get an error:
Frame.new({name: 'Name of the frame', manufacturer_attributes: {id:2}})
Error:
Couldn't find Manufacturer with ID=2 for Frame with ID=
The problem is that Frame.new
is a new record, when ActiveRecord reaches the parameter manufacturers_attributes
it performs a lookup on the association manufacturers_attributes
for Frame.new
which is unsaved and hence has no id with which to perform the lookup.
I recommend starting with the existing manufacturer
record and simply create the frame like so manufacturer.frames.create(frame_params)
(assuming a one-to-many relationship).
However, if you must do it this way you can overwrite the manufacturer_attributes
method like so:
accepts_nested_attributes_for :manufacturer
def manufacturer_attributes=(attributes)
if attributes['id'].present?
self.manufacturer = Manufacturer.find(attributes['id'])
end
super
end
Thus, you assign the manufacturer before the original manufacturer_attributes
tries to access it on the new record, which previously caused the error.
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With