I''ve been stumped on this for a few days and I''m not sure if
it''s an error
on my end or an actual bug.
I have a system where I have workshops and users. Workshops have students,
presenters, and troubleshooters. I wanted to represent this simply by
using has_many :through with :source.
Workshop
has_many :presenters, :through =>:presenterships, :source=>:user
This actually works great. However, I am running into a really interesting
problem when doing the assignments:
This works:
@u = User.find 1
@w = Workshop.find 1
@w.presenterships.create :user_id => u.id
But this fails:
@u = User.find 1
@w = Workshop.find 1
@w.presenterships.create :user => u
Notice t he assignment of the object instead of the id field.
The trickiest part of all this is that I get a really strange error message:
ActiveRecord::AssociationTypeMismatch: User expected, got User
from c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2
/lib/active_recor
d/associations/association_proxy.rb:148:in `raise_on_type_mismatch''
from c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2
/lib/active_recor
d/associations/belongs_to_association.rb:22:in `replace''
from c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2
/lib/active_recor
d/associations.rb:900:in `user=''
from c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2
/lib/active_recor
d/base.rb:1673:in `attributes=''
from c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2
/lib/active_recor
d/base.rb:1672:in `attributes=''
from c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2
/lib/active_recor
d/base.rb:1506:in `initialize_without_callbacks''
from c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2
/lib/active_recor
d/callbacks.rb:225:in `initialize''
from c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2
/lib/active_recor
d/associations/has_many_association.rb:13:in `build''
from c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2
/lib/active_recor
d/associations/association_collection.rb:93:in `create''
from (irb):5
I''ve pasted my classes below. The migrations are standard
(presenterships
just has its own id and the two foreign keys). I''d appreciate any
insight.
I have a workaround but I was just wondering if this was a bug or a
limitation.
class Workshop < ActiveRecord::Base
has_many :presenterships
has_many :presenters, :through =>:presenterships, :source=>:user
end
class Presentership < ActiveRecord::Base
belongs_to :workshop
belongs_to :user
end
class User
# lots of validations
end
--~--~---------~--~----~------------~-------~--~----~
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i tested your example exactly as you posted it and all works fine for me using Rails 1.1.6.>> w = Workshop.find 1=> #<Workshop:0xb797928c @attributes={"name"=>"RailsConf", "id"=>"1"}>>> users = User.find(:all)=> [#<User:0xb792f650 @attributes={"name"=>"Bob", "id"=>"1"}>, #<User:0xb792f614 @attributes={"name"=>"Joe", "id"=>"2"}>]>> w.presenterships.create :user_id => users[0].id=> #<Presentership:0xb7923828 @errors=#<ActiveRecord::Errors:0xb7922d60 @errors={}, @base=#<Presentership:0xb7923828 ...>>, @attributes={"workshop_id"=>1, "id"=>1, "user_id"=>1}, @new_record=false>>> w.presenterships.create :user => users[1]=> #<Presentership:0xb791cd5c @errors=#<ActiveRecord::Errors:0xb791c438 @errors={}, @base=#<Presentership:0xb791cd5c ...>>, @attributes={"workshop_id"=>1, "id"=>2, "user_id"=>2}, @user=#<User:0xb792f614 @attributes={"name"=>"Joe", "id"=>"2"}>, @new_record=false>>> w.presenters true=> [#<User:0xb7913be4 @attributes={"name"=>"Bob", "id"=>"1"}>, #<User:0xb79139c8 @attributes={"name"=>"Joe", "id"=>"2"}>] On 2/8/07, Brian Hogan <bphogan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> I''ve been stumped on this for a few days and I''m not sure if it''s an error > on my end or an actual bug. > I have a system where I have workshops and users. Workshops have students, > presenters, and troubleshooters. I wanted to represent this simply by > using has_many :through with :source. > > Workshop > has_many :presenters, :through =>:presenterships, :source=>:user > > This actually works great. However, I am running into a really interesting > problem when doing the assignments: > This works: > > @u = User.find 1 > @w = Workshop.find 1 > @w.presenterships.create :user_id => > u.id > But this fails: > > @u = User.find 1 > @w = Workshop.find 1 > @w.presenterships.create :user => u > > > Notice t he assignment of the object instead of the id field. > > The trickiest part of all this is that I get a really strange error message: > > ActiveRecord::AssociationTypeMismatch: User expected, got > User > from > c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2/lib/active_recor > d/associations/association_proxy.rb:148:in > `raise_on_type_mismatch'' > from > c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2 > /lib/active_recor > d/associations/belongs_to_association.rb:22:in `replace'' > from > c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2/lib/active_recor > d/associations.rb:900:in `user='' > from c:/ruby/lib/ruby/gems/1.8/gems/activerecord- > 1.15.2/lib/active_recor > d/base.rb:1673:in `attributes='' > from > c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2/lib/active_recor > d/base.rb:1672:in `attributes='' > from c:/ruby/lib/ruby/gems/1.8/gems/activerecord- > 1.15.2/lib/active_recor > d/base.rb:1506:in `initialize_without_callbacks'' > from > c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2/lib/active_recor > d/callbacks.rb:225:in `initialize'' > from c:/ruby/lib/ruby/gems/1.8/gems/activerecord- > 1.15.2/lib/active_recor > d/associations/has_many_association.rb:13:in `build'' > from > c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2/lib/active_recor > d/associations/association_collection.rb:93:in `create'' > from (irb):5 > > > I''ve pasted my classes below. The migrations are standard (presenterships > just has its own id and the two foreign keys). I''d appreciate any insight. > I have a workaround but I was just wondering if this was a bug or a > limitation. > > class Workshop < ActiveRecord::Base > > > has_many :presenterships > has_many :presenters, :through =>:presenterships, :source=>:user > > end > > class Presentership < ActiveRecord::Base > > belongs_to :workshop > belongs_to :user > end > > > > class User > # lots of validations > end > > > > > > > > > >--~--~---------~--~----~------------~-------~--~----~ 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 rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
Yeah.... forgot to mention that I am using 1.2.1 (and now 1.2.2) Could you confirm this? On 2/8/07, Chris Hall <christopher.k.hall-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> > > i tested your example exactly as you posted it and all works fine for > me using Rails 1.1.6. > > > >> w = Workshop.find 1 > => #<Workshop:0xb797928c @attributes={"name"=>"RailsConf", "id"=>"1"}> > > >> users = User.find(:all) > => [#<User:0xb792f650 @attributes={"name"=>"Bob", "id"=>"1"}>, > #<User:0xb792f614 @attributes={"name"=>"Joe", "id"=>"2"}>] > > >> w.presenterships.create :user_id => users[0].id > => #<Presentership:0xb7923828 > @errors=#<ActiveRecord::Errors:0xb7922d60 @errors={}, > @base=#<Presentership:0xb7923828 ...>>, @attributes={"workshop_id"=>1, > "id"=>1, "user_id"=>1}, @new_record=false> > > >> w.presenterships.create :user => users[1] > => #<Presentership:0xb791cd5c > @errors=#<ActiveRecord::Errors:0xb791c438 @errors={}, > @base=#<Presentership:0xb791cd5c ...>>, @attributes={"workshop_id"=>1, > "id"=>2, "user_id"=>2}, @user=#<User:0xb792f614 > @attributes={"name"=>"Joe", "id"=>"2"}>, @new_record=false> > > >> w.presenters true > => [#<User:0xb7913be4 @attributes={"name"=>"Bob", "id"=>"1"}>, > #<User:0xb79139c8 @attributes={"name"=>"Joe", "id"=>"2"}>] > > > On 2/8/07, Brian Hogan <bphogan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote: > > I''ve been stumped on this for a few days and I''m not sure if it''s an > error > > on my end or an actual bug. > > I have a system where I have workshops and users. Workshops have > students, > > presenters, and troubleshooters. I wanted to represent this simply by > > using has_many :through with :source. > > > > Workshop > > has_many :presenters, :through =>:presenterships, :source=>:user > > > > This actually works great. However, I am running into a really > interesting > > problem when doing the assignments: > > This works: > > > > @u = User.find 1 > > @w = Workshop.find 1 > > @w.presenterships.create :user_id => > > u.id > > But this fails: > > > > @u = User.find 1 > > @w = Workshop.find 1 > > @w.presenterships.create :user => u > > > > > > Notice t he assignment of the object instead of the id field. > > > > The trickiest part of all this is that I get a really strange error > message: > > > > ActiveRecord::AssociationTypeMismatch: User expected, got > > User > > from > > c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2/lib/active_recor > > d/associations/association_proxy.rb:148:in > > `raise_on_type_mismatch'' > > from > > c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2 > > /lib/active_recor > > d/associations/belongs_to_association.rb:22:in `replace'' > > from > > c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2/lib/active_recor > > d/associations.rb:900:in `user='' > > from c:/ruby/lib/ruby/gems/1.8/gems/activerecord- > > 1.15.2/lib/active_recor > > d/base.rb:1673:in `attributes='' > > from > > c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2/lib/active_recor > > d/base.rb:1672:in `attributes='' > > from c:/ruby/lib/ruby/gems/1.8/gems/activerecord- > > 1.15.2/lib/active_recor > > d/base.rb:1506:in `initialize_without_callbacks'' > > from > > c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2/lib/active_recor > > d/callbacks.rb:225:in `initialize'' > > from c:/ruby/lib/ruby/gems/1.8/gems/activerecord- > > 1.15.2/lib/active_recor > > d/associations/has_many_association.rb:13:in `build'' > > from > > c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2/lib/active_recor > > d/associations/association_collection.rb:93:in `create'' > > from (irb):5 > > > > > > I''ve pasted my classes below. The migrations are standard > (presenterships > > just has its own id and the two foreign keys). I''d appreciate any > insight. > > I have a workaround but I was just wondering if this was a bug or a > > limitation. > > > > class Workshop < ActiveRecord::Base > > > > > > has_many :presenterships > > has_many :presenters, :through =>:presenterships, :source=>:user > > > > end > > > > class Presentership < ActiveRecord::Base > > > > belongs_to :workshop > > belongs_to :user > > end > > > > > > > > class User > > # lots of validations > > end > > > > > > > > > > > > > > > > > > > > > > >--~--~---------~--~----~------------~-------~--~----~ 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 rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
works for 1.2.2 for me as well>> RAILS_GEM_VERSION=> "1.2.2">> w = Workshop.find :first=> #<Workshop:0xb7629168 @attributes={"name"=>"RailsConf", "id"=>"1"}>>> users = User.find(:all)=> [#<User:0xb7620964 @attributes={"name"=>"Bob", "id"=>"1"}>, #<User:0xb7620928 @attributes={"name"=>"Joe", "id"=>"2"}>]>> w.presenterships.clear=> []>> w.presenterships.create :user_id => users[0].id=> #<Presentership:0xb760c428 @errors=#<ActiveRecord::Errors:0xb760b898 @errors={}, @base=#<Presentership:0xb760c428 ...>>, @attributes={"workshop_id"=>1, "id"=>5, "user_id"=>1}, @new_record=false>>> w.presenterships.create :user => users[1]=> #<Presentership:0xb76066e0 @errors=#<ActiveRecord::Errors:0xb7605da8 @errors={}, @base=#<Presentership:0xb76066e0 ...>>, @attributes={"workshop_id"=>1, "id"=>6, "user_id"=>2}, @new_record=false, @user=#<User:0xb7620928 @attributes={"name"=>"Joe", "id"=>"2"}>>>> w.presenterships=> [#<Presentership:0xb760c428 @errors=#<ActiveRecord::Errors:0xb760b898 @errors={}, @base=#<Presentership:0xb760c428 ...>>, @attributes={"workshop_id"=>1, "id"=>5, "user_id"=>1}, @new_record=false>, #<Presentership:0xb76066e0 @errors=#<ActiveRecord::Errors:0xb7605da8 @errors={}, @base=#<Presentership:0xb76066e0 ...>>, @attributes={"workshop_id"=>1, "id"=>6, "user_id"=>2}, @new_record=false, @user=#<User:0xb7620928 @attributes={"name"=>"Joe", "id"=>"2"}>>]>> w.presenters true=> [#<User:0xb75ff8e0 @attributes={"name"=>"Bob", "id"=>"1"}>, #<User:0xb75ff8b8 @attributes={"name"=>"Joe", "id"=>"2"}>] On 2/8/07, Brian Hogan <bphogan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> Yeah.... forgot to mention that I am using 1.2.1 (and now 1.2.2) > Could you confirm this? > > > On 2/8/07, Chris Hall < christopher.k.hall-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote: > > > > i tested your example exactly as you posted it and all works fine for > > me using Rails 1.1.6. > > > > > > >> w = Workshop.find 1 > > => #<Workshop:0xb797928c > @attributes={"name"=>"RailsConf", "id"=>"1"}> > > > > >> users = User.find (:all) > > => [#<User:0xb792f650 @attributes={"name"=>"Bob", "id"=>"1"}>, > > #<User:0xb792f614 @attributes={"name"=>"Joe", "id"=>"2"}>] > > > > >> w.presenterships.create :user_id => users[0].id > > => #<Presentership:0xb7923828 > > @errors=#<ActiveRecord::Errors:0xb7922d60 @errors={}, > > @base=#<Presentership:0xb7923828 ...>>, > @attributes={"workshop_id"=>1, > > "id"=>1, "user_id"=>1}, @new_record=false> > > > > >> w.presenterships.create :user => users[1] > > => #<Presentership:0xb791cd5c > > @errors=#<ActiveRecord::Errors:0xb791c438 @errors={}, > > @base=#<Presentership:0xb791cd5c ...>>, > @attributes={"workshop_id"=>1, > > "id"=>2, "user_id"=>2}, @user=#<User:0xb792f614 > > @attributes={"name"=>"Joe", "id"=>"2"}>, @new_record=false> > > > > >> w.presenters true > > => [#<User:0xb7913be4 @attributes={"name"=>"Bob", "id"=>"1"}>, > > #<User:0xb79139c8 @attributes={"name"=>"Joe", "id"=>"2"}>] > > > > > > On 2/8/07, Brian Hogan <bphogan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote: > > > I''ve been stumped on this for a few days and I''m not sure if it''s an > error > > > on my end or an actual bug. > > > I have a system where I have workshops and users. Workshops have > students, > > > presenters, and troubleshooters. I wanted to represent this simply by > > > using has_many :through with :source. > > > > > > Workshop > > > has_many :presenters, :through =>:presenterships, :source=>:user > > > > > > This actually works great. However, I am running into a really > interesting > > > problem when doing the assignments: > > > This works: > > > > > > @u = User.find 1 > > > @w = Workshop.find 1 > > > @w.presenterships.create :user_id => > > > u.id > > > But this fails: > > > > > > @u = User.find 1 > > > @w = Workshop.find 1 > > > @w.presenterships.create :user => u > > > > > > > > > Notice t he assignment of the object instead of the id field. > > > > > > The trickiest part of all this is that I get a really strange error > message: > > > > > > ActiveRecord::AssociationTypeMismatch: User expected, > got > > > User > > > from > > > > c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2/lib/active_recor > > > d/associations/association_proxy.rb:148:in > > > `raise_on_type_mismatch'' > > > from > > > c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2 > > > /lib/active_recor > > > d/associations/belongs_to_association.rb:22:in > `replace'' > > > from > > > > c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2/lib/active_recor > > > d/associations.rb:900:in `user='' > > > from > c:/ruby/lib/ruby/gems/1.8/gems/activerecord- > > > 1.15.2/lib/active_recor > > > d/base.rb:1673:in `attributes='' > > > from > > > > c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2/lib/active_recor > > > d/base.rb:1672:in `attributes='' > > > from > c:/ruby/lib/ruby/gems/1.8/gems/activerecord- > > > 1.15.2/lib/active_recor > > > d/base.rb:1506:in `initialize_without_callbacks'' > > > from > > > > c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2/lib/active_recor > > > d/callbacks.rb:225:in `initialize'' > > > from > c:/ruby/lib/ruby/gems/1.8/gems/activerecord- > > > 1.15.2/lib/active_recor > > > d/associations/has_many_association.rb:13:in `build'' > > > from > > > c:/ruby/lib/ruby/gems/1.8/gems/activerecord- > 1.15.2/lib/active_recor > > > d/associations/association_collection.rb:93:in `create'' > > > from (irb):5 > > > > > > > > > I''ve pasted my classes below. The migrations are standard > (presenterships > > > just has its own id and the two foreign keys). I''d appreciate any > insight. > > > I have a workaround but I was just wondering if this was a bug or a > > > limitation. > > > > > > class Workshop < ActiveRecord::Base > > > > > > > > > has_many :presenterships > > > has_many :presenters, :through =>:presenterships, :source=>:user > > > > > > end > > > > > > class Presentership < ActiveRecord::Base > > > > > > belongs_to :workshop > > > belongs_to :user > > > end > > > > > > > > > > > > class User > > > # lots of validations > > > end > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >--~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. 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@Chris: Thanks for trying to duplicate. I''ve recreated this in a new project and it worked fine, so that means the current project is doing something something else that''s causing the incompatibility issue. I was afraid it was something I did, and looks like I was right. On 2/8/07, Chris Hall <christopher.k.hall-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> > > works for 1.2.2 for me as well > > >> RAILS_GEM_VERSION > => "1.2.2" > >> w = Workshop.find :first > => #<Workshop:0xb7629168 @attributes={"name"=>"RailsConf", "id"=>"1"}> > >> users = User.find(:all) > => [#<User:0xb7620964 @attributes={"name"=>"Bob", "id"=>"1"}>, > #<User:0xb7620928 @attributes={"name"=>"Joe", "id"=>"2"}>] > >> w.presenterships.clear > => [] > > >> w.presenterships.create :user_id => users[0].id > => #<Presentership:0xb760c428 > @errors=#<ActiveRecord::Errors:0xb760b898 @errors={}, > @base=#<Presentership:0xb760c428 ...>>, @attributes={"workshop_id"=>1, > "id"=>5, "user_id"=>1}, @new_record=false> > > >> w.presenterships.create :user => users[1] > => #<Presentership:0xb76066e0 > @errors=#<ActiveRecord::Errors:0xb7605da8 @errors={}, > @base=#<Presentership:0xb76066e0 ...>>, @attributes={"workshop_id"=>1, > "id"=>6, "user_id"=>2}, @new_record=false, @user=#<User:0xb7620928 > @attributes={"name"=>"Joe", "id"=>"2"}>> > > >> w.presenterships > => [#<Presentership:0xb760c428 > @errors=#<ActiveRecord::Errors:0xb760b898 @errors={}, > @base=#<Presentership:0xb760c428 ...>>, @attributes={"workshop_id"=>1, > "id"=>5, "user_id"=>1}, @new_record=false>, #<Presentership:0xb76066e0 > @errors=#<ActiveRecord::Errors:0xb7605da8 @errors={}, > @base=#<Presentership:0xb76066e0 ...>>, @attributes={"workshop_id"=>1, > "id"=>6, "user_id"=>2}, @new_record=false, @user=#<User:0xb7620928 > @attributes={"name"=>"Joe", "id"=>"2"}>>] > > >> w.presenters true > => [#<User:0xb75ff8e0 @attributes={"name"=>"Bob", "id"=>"1"}>, > #<User:0xb75ff8b8 @attributes={"name"=>"Joe", "id"=>"2"}>] > > > On 2/8/07, Brian Hogan <bphogan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote: > > Yeah.... forgot to mention that I am using 1.2.1 (and now 1.2.2) > > Could you confirm this? > > > > > > On 2/8/07, Chris Hall < christopher.k.hall-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote: > > > > > > i tested your example exactly as you posted it and all works fine for > > > me using Rails 1.1.6. > > > > > > > > > >> w = Workshop.find 1 > > > => #<Workshop:0xb797928c > > @attributes={"name"=>"RailsConf", "id"=>"1"}> > > > > > > >> users = User.find (:all) > > > => [#<User:0xb792f650 @attributes={"name"=>"Bob", "id"=>"1"}>, > > > #<User:0xb792f614 @attributes={"name"=>"Joe", "id"=>"2"}>] > > > > > > >> w.presenterships.create :user_id => users[0].id > > > => #<Presentership:0xb7923828 > > > @errors=#<ActiveRecord::Errors:0xb7922d60 @errors={}, > > > @base=#<Presentership:0xb7923828 ...>>, > > @attributes={"workshop_id"=>1, > > > "id"=>1, "user_id"=>1}, @new_record=false> > > > > > > >> w.presenterships.create :user => users[1] > > > => #<Presentership:0xb791cd5c > > > @errors=#<ActiveRecord::Errors:0xb791c438 @errors={}, > > > @base=#<Presentership:0xb791cd5c ...>>, > > @attributes={"workshop_id"=>1, > > > "id"=>2, "user_id"=>2}, @user=#<User:0xb792f614 > > > @attributes={"name"=>"Joe", "id"=>"2"}>, @new_record=false> > > > > > > >> w.presenters true > > > => [#<User:0xb7913be4 @attributes={"name"=>"Bob", "id"=>"1"}>, > > > #<User:0xb79139c8 @attributes={"name"=>"Joe", "id"=>"2"}>] > > > > > > > > > On 2/8/07, Brian Hogan <bphogan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote: > > > > I''ve been stumped on this for a few days and I''m not sure if it''s an > > error > > > > on my end or an actual bug. > > > > I have a system where I have workshops and users. Workshops have > > students, > > > > presenters, and troubleshooters. I wanted to represent this simply > by > > > > using has_many :through with :source. > > > > > > > > Workshop > > > > has_many :presenters, :through =>:presenterships, :source=>:user > > > > > > > > This actually works great. However, I am running into a really > > interesting > > > > problem when doing the assignments: > > > > This works: > > > > > > > > @u = User.find 1 > > > > @w = Workshop.find 1 > > > > @w.presenterships.create :user_id => > > > > u.id > > > > But this fails: > > > > > > > > @u = User.find 1 > > > > @w = Workshop.find 1 > > > > @w.presenterships.create :user => u > > > > > > > > > > > > Notice t he assignment of the object instead of the id field. > > > > > > > > The trickiest part of all this is that I get a really strange error > > message: > > > > > > > > ActiveRecord::AssociationTypeMismatch: User expected, > > got > > > > User > > > > from > > > > > > c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2/lib/active_recor > > > > d/associations/association_proxy.rb:148:in > > > > `raise_on_type_mismatch'' > > > > from > > > > c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2 > > > > /lib/active_recor > > > > d/associations/belongs_to_association.rb:22:in > > `replace'' > > > > from > > > > > > c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2/lib/active_recor > > > > d/associations.rb:900:in `user='' > > > > from > > c:/ruby/lib/ruby/gems/1.8/gems/activerecord- > > > > 1.15.2/lib/active_recor > > > > d/base.rb:1673:in `attributes='' > > > > from > > > > > > c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2/lib/active_recor > > > > d/base.rb:1672:in `attributes='' > > > > from > > c:/ruby/lib/ruby/gems/1.8/gems/activerecord- > > > > 1.15.2/lib/active_recor > > > > d/base.rb:1506:in `initialize_without_callbacks'' > > > > from > > > > > > c:/ruby/lib/ruby/gems/1.8/gems/activerecord-1.15.2/lib/active_recor > > > > d/callbacks.rb:225:in `initialize'' > > > > from > > c:/ruby/lib/ruby/gems/1.8/gems/activerecord- > > > > 1.15.2/lib/active_recor > > > > d/associations/has_many_association.rb:13:in `build'' > > > > from > > > > c:/ruby/lib/ruby/gems/1.8/gems/activerecord- > > 1.15.2/lib/active_recor > > > > d/associations/association_collection.rb:93:in `create'' > > > > from (irb):5 > > > > > > > > > > > > I''ve pasted my classes below. The migrations are standard > > (presenterships > > > > just has its own id and the two foreign keys). I''d appreciate any > > insight. > > > > I have a workaround but I was just wondering if this was a bug or a > > > > limitation. > > > > > > > > class Workshop < ActiveRecord::Base > > > > > > > > > > > > has_many :presenterships > > > > has_many :presenters, :through =>:presenterships, :source=>:user > > > > > > > > end > > > > > > > > class Presentership < ActiveRecord::Base > > > > > > > > belongs_to :workshop > > > > belongs_to :user > > > > end > > > > > > > > > > > > > > > > class User > > > > # lots of validations > > > > end > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >--~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. 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On 2/8/07, Brian Hogan <bphogan-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> I was afraid it was something I did, and looks like I was right.I don''t think it''s something you did. Check the thread titled "AssociationTypeMismatch: RoleType expected, got RoleType" I''m having the same problem and I haven''t changed anything...only upgraded Rails. I think the reason these guys weren''t able to repeat is that it always works the first time you restart your server, but after that it''s broken. Wondering if someone has filed this as an official bug.... Jake --~--~---------~--~----~------------~-------~--~----~ 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 rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
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