On 16 October 2010 13:47, Max Reznichenko <[email protected]> wrote: > Colin Law wrote in post #954645: >> >> Are the reverse relationships has_many or belongs_to? >> >> Colin > > Yes, sure. > A <--belongs_to- B <--belongs_to- C <--belongs_to- D > > 2Steve. > > Here you have a right solution, but this code should be written in > controller. In this case, I could easily run through all records and > calculate the Model A`s state. > > Anyway, for 3 model structure there is actually a solution. Here it is: > #Model C definition > belongs_to :model_b > > #Model B definition > has_many :model_c > belongs_to :model_a > > #Model A definition > has_many :model_b > -->has_many :model_c, :through => :model_b
I have not tried it but can you then say has_many :model_d, :through -> :model_c If you can then I think you can just find A where a.d.state is whatever. Colin > > Max Reznichenko > > -- > Posted via http://www.ruby-forum.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. > > -- 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.
