Erol, Thanks, it did not occur to me to try this kind of finder. The second option also works, especially "common practice" part - learning Rails idioms here.
I initially assumed ActiveRecord would be able to build a query based on known PK and FK attributes of the association without explicit reference of parent's id, which would be, in my opinion, more OO Nikolai On Mon, Oct 18, 2010 at 11:40 AM, Erol Fornoles <[email protected]> wrote: > You can use dynamic finders: > Child.find_by_parent_id_and_name(parent.id, "Timmy") > > But then again, if you already have the parent object, the common practice > is to setup the children association and get the child using it: > parent.children.find_by_name("Timmy") > Which IMO is more readable than the first example. > On Mon, Oct 18, 2010 at 10:35 PM, Nikolai Teleguine <[email protected]> > wrote: >> >> Erol, >> >> Thank you for the reply. >> >> This will work, but is there a way to do this search without adding >> another association? >> I am just trying to learn the capabilities of ActiveRecord. >> >> Let me re-state the problem: I either already have the parent object, >> or know enough of it's attributes to find the parent. >> But the goal is to find the child, using only its 'parent' association. >> >> Child.find (:name=>"Timmy", parent => knownParent ) >> - or - >> Child.find (:name=>"Timmy", parent.name => "Michael") >> >> -- >> 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. >> > > > > -- > Erol M. Fornoles > http://erolfornoles.posterous.com > http://github.com/Erol > http://twitter.com/erolfornoles > http://ph.linkedin.com/in/erolfornoles > > -- > 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.
