Hi, I am having difficulties accessing parent properties/attributes from the child. Anyone could shed some lights onto this? Heres a sample code: class Parent < ActiveRecord::Base :has_many => :childs @connector def before_save @connector = 'some connector object' 0..9.do |count| self.childs << Child.new self.childs[count].connector = @connector end end end class Child < ActiveRecord::Base :belongs_to => :parent @connector def before_save # code goes here to access @connector end end The above is just a recreation of what I am looking to do. So basically I want to be able to access objects like the connector from the child, or even the parent itself by something like self.parent.attributes. Any ideas? thanks, nayeem
on 2009-06-07 12:45
on 2009-06-07 15:33
Hi, when I saw your models, I was thinking that you should have the following relationships: Parent has many children Child has many parents Thus, you should have the following database tables: children and parents. By doing this, this becomes a many to many relationship. Good luck, -Conrad Sent from my iPhone On Jun 7, 2009, at 1:35 AM, developerinlondon <firstname.lastname@example.org>
on 2009-06-07 15:58
No I need to have it so that Child has one parent. I managed to get a reference to the parent by using the ObjectSpace. But its almost a hack then a nice way of doing it. 2009/6/7 Conrad Taylor <email@example.com> > > > Hi, > > @connector = 'some connector object' > > def before_save > > > > thanks, > > > > nayeem > > > > > > > > > -- cashflowclublondon.co.uk ("`-''-/").___..--''"`-._ `6_ 6 ) `-. ( ).`-.__.`) (_Y_.)' ._ ) `._ `. ``-..-' _..`--'_..-_/ /--'_.' ,' (il),-'' (li),' ((!.-' .
on 2009-06-07 19:15
developerinlondon wrote: > Hi, > > I am having difficulties accessing parent properties/attributes from > the child. Anyone could shed some lights onto this? > > Heres a sample code: [...] Your sample code will not do the job. All you need is class Parent > ActiveRecord::Base has_many :children end class Child > ActiveRecord::Base belongs_to :parent end ...and parent.children and child.parent will work as you'd like. @connector is unnecessary. Check the docs for Associations; Rails makes this ridiculously simple. Best, -- Marnen Laibow-Koser http://www.marnen.org firstname.lastname@example.org
on 2009-06-07 19:25
That Works! Thanks! 2009/6/7 Marnen Laibow-Koser <email@example.com> > Your sample code will not do the job. All you need is > @connector is unnecessary. > > > > -- cashflowclublondon.co.uk ("`-''-/").___..--''"`-._ `6_ 6 ) `-. ( ).`-.__.`) (_Y_.)' ._ ) `._ `. ``-..-' _..`--'_..-_/ /--'_.' ,' (il),-'' (li),' ((!.-' .