On 1 September 2012 16:15, Jason Walsh <[email protected]> wrote: > Hi > > Is there a method to create child objects after a parent object has been > created? > > eg i have a process class, which when created should contain at least 1 > digram class. > > I have looked at the initialize method but not sure when this is invoked > ie when an object is created (ie saved to db) or everytime an object is > instantiated (ie read from db). > > I only want to invoke the method to create child object the first time > parent object is saved to the db.
You could put it in the controller method that creates the parent object, or you could use after_create in the parent model. You have not told us the relationship between parent and child - I guess it is parent has_many children, child belongs_to parent. In which case to create a child object you can use @parent.children.build( ,, ) or .children.create( .. ) to create the child. Have a look at the Rails Guide on associations to see how these work. Colin > > I suppose this is like a transaction (ie both records need to be saved > or none), but again not sure how this is implemented in rails. > > Thanks in advance :) > > Jase > > -- > 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 https://groups.google.com/groups/opt_out. > > -- 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 https://groups.google.com/groups/opt_out.
