hallo everybody,
i already googled the following problem, but there are so many
questions regarding "has_many :through", that i just couldn't find
what i was looking for. so, i'm really sorry if this has been asked
before. if so, just drop me the link.
i have a has_many :through relationship similar to the following
example:
class Group < ActiveRecord::Base
has_many :group_memberships,
:dependent => :destroy
has_many :admins,
:through => :group_memberships,
:source => :user,
:conditions => 'is_admin = true AND pending = false'
end
class GroupMembership < ActiveRecord::Base
belongs_to :group
belongs_to :user
end
class User < ActiveRecord::Base
has_many :group_memberships
has_many :administrations,
:through => :group_memberships,
:source => :group,
:conditions => "is_admin = true AND pending = false "
end
this is working fine. i even started a new rails-project and tried it
there. no problem.
now in an existing project of mine i sometimes get the following:
g = Group.first
=> #<Group id: 1, created_at: "2009-10-28 11:42:36", updated_at:
"2009-10-28 11:42:36">
>> g.admins.include? User.first
ArgumentError: wrong number of arguments (1 for 0)
from /usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/
active_record/connection_adapters/mysql_adapter.rb:226:in `kind_of?'
from /usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/
active_record/connection_adapters/mysql_adapter.rb:226:in `quote'
from /usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/
active_record/base.rb:2392:in `quote_bound_value'
from /usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/
active_record/base.rb:2352:in `replace_bind_variables'
from /usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/
active_record/base.rb:2352:in `gsub'
from /usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/
active_record/base.rb:2352:in `replace_bind_variables'
from /usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/
active_record/base.rb:2320:in `sanitize_sql_hash_for_conditions'
from /usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/
active_record/base.rb:2231:in `sanitize_sql'
from /usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/
active_record/base.rb:2006:in `expand_id_conditions'
from /usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/
active_record/base.rb:692:in `exists?'
from /usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/
active_record/associations/association_collection.rb:380:in `send'
from /usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/
active_record/associations/association_collection.rb:380:in
`method_missing_without_paginate'
from /usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/
active_record/base.rb:2143:in `with_scope'
from /usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/
active_record/associations/association_proxy.rb:206:in `send'
from /usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/
active_record/associations/association_proxy.rb:206:in `with_scope'
from /usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/
active_record/associations/association_collection.rb:376:in
`method_missing_without_paginate'
from /home/n0ne/_files/work/beagile/code/comuungo/vendor/
plugins/will_paginate/lib/will_paginate/finder.rb:170:in
`method_missing'
from /usr/lib64/ruby/gems/1.8/gems/activerecord-2.3.4/lib/
active_record/associations/association_collection.rb:336:in `include?'
from (irb):3>>
however, when i reload that association before asking for admins it is
working:
>> g.admins
=> []
>> g.admins.include? User.last
=> false
same thing:
Group.first.admins.include? User.last
=> Exception (see above)
Group.first.admin_ids.include? User.last
=> false
I already checked will_paginate as it is mentioned in the trace. But
in my test-project i set up it is working perfectly with the above
code and will_paginate installed.
Has anyone ever seen a behaviuor like this? Any clues, hints or tipps?
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