Rails: building object from has_many associated object

Question

I think it might be a syntax problem.

1. I have a Event.rb model:

   class Event < ActiveRecord::Base
    belongs_to :members
    has_one :brazusc
   end
   

   A Member.rb:

   class Member < ActiveRecord::Base
    has_many :events
   end
   

   And a Brazusc.rb model:

   class Brazusc < ActiveRecord::Base
    belongs_to :event
   end
   

What I am trying to do: member.events.build_brazusc, but I get:

NoMethodError: undefined method `build_brazusc' for #<Event::ActiveRecord_Associations_CollectionProxy:0x007f99517d4a78>

How would I build an object from the has_many association?

2. I am also trying to retrieve the associated model from a has_many/has_one association, like this: member.events.brazusc, since brazusc has an event_id, but I get:

   NoMethodError: undefined method `leads' for #<Event::ActiveRecord_Associations_CollectionProxy:0x007f99517d4a78>
   

How can I retrieve the object (brazusc) that is associated with event?

Any help will be much appreciated.

Answer 1

This would do the trick:

new_brazusc = member.events.find_by(name: "Brazusc")
new_brazusc.build_brazusc.save