I'm having a problem with some associations in Rails3.
I have the following associations
InformationCategory :has_many => Informations :has_many => InformationValues
I'm able to succesfully do the following:
Information.first.information_values => [#InformationValue..]
I'm also able to do the following:
InformationCategory.first.informations => [#Information...]
However, for some reason, this fails:
InformationCategory.first.informations.first.information_values => NoMethodError: undefined method `information_values' for #<Information:0x000001053321c8>
Why can't I use 'nested associations' in Rails? The error message clearly states that
InformationCategory.first.informations.first returns an instance of
Am I doing something wrong?
Thanks in advance!
You don't define all the nested descendants on outermost model: each model defines what it "directly" has_many of, or the model it belongs_to. Because your question is wrong, I can only guess without seeing more specifically how your models are supposed to be related.
This might be a start:
class InformationCategory < ActiveRecord::Base has_many :informations end class Information < ActiveRecord::Base belongs_to :information_category has_many :information_values end class InformationValue < ActiveRecord::Base belongs_to :information end
However, you might be trying to do a
has_many :through, but I can't tell from your question.