Hi. I'm seeing an error in my "has n through" relationship when
migrating from dm-core 0.9.10 to 0.10. Please let me know if I'm
writing the syntax wrong.
Here's the model:
class User
include DataMapper::Resource
property :id, Serial
has n, :group_memberships
has n, :groups, :through => :group_memberships, :model =>
"Group", :via => :group, :parent_key => [:id], :child_key =>
[:user_id]
end
It produces this error when I use User.auto_migrate!
NoMethodError: undefined method ‘name’ for nil:NilClass
method initialize in property_set.rb at line 169
Here's a couple scripts that should easily allow you to reproduce the
error:
This script works in 0.9.10:
http://gist.github.com/192686
This same script breaks in 0.10.0:
http://gist.github.com/192682
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