There is an table that contains associations into itself.
An account are referred by another one through account_id (or
parent_id on dm-is-tree using) column.
Both dm-is-tree and has/belong methods returns same error on
children fetching.
---
class Account
include DataMapper::Resource
property( :id, Integer, :serial => true )
belongs_to :account
has n, :accounts
end
---
Hierarchy
id1
+- id2
+- id3
acc = Account.get(2)
now, i can fetch parent by
acc.account
it returns id1
but, when i try to fetch children, by
acc.accounts
get error:
undefined method `<<' for nil:NilClass
/usr/local/lib/ruby/gems/1.8/gems/dm-core-0.9.10/lib/dm-core/
associations/relationship.rb:99:in `get_children'
/usr/local/lib/ruby/gems/1.8/gems/extlib-0.9.9/lib/extlib/
lazy_array.rb:391:in `each'
/usr/local/lib/ruby/gems/1.8/gems/extlib-0.9.9/lib/extlib/
lazy_array.rb:391:in `send'
...
tried dm-is-tree as well
---
class Account
include DataMapper::Resource
property( :id, Integer, :serial => true )
is :tree
end
---
now, the relation column are parent_id
got same result
acc.parent works
acc.children returns same error
undefined method `<<' for nil:NilClass
/usr/local/lib/ruby/gems/1.8/gems/dm-core-0.9.10/lib/dm-core/
associations/relationship.rb:99:in `get_children'
/usr/local/lib/ruby/gems/1.8/gems/extlib-0.9.9/lib/extlib/
lazy_array.rb:391:in `each'
/usr/local/lib/ruby/gems/1.8/gems/extlib-0.9.9/lib/extlib/
lazy_array.rb:391:in `send'
/usr/local/lib/ruby/gems/1.8/gems/extlib-0.9.9/lib/extlib/
lazy_array.rb:391:in `method_missing'
/usr/local/lib/ruby/gems/1.8/gems/dm-core-0.9.10/lib/dm-core/
collection.rb:664:in `method_missing'
/usr/local/lib/ruby/gems/1.8/gems/dm-core-0.9.10/lib/dm-core/
associations/relationship.rb:95:in `get_children'
/usr/local/lib/ruby/gems/1.8/gems/dm-core-0.9.10/lib/dm-core/
associations/relationship.rb:172:in `with_repository'
/usr/local/lib/ruby/gems/1.8/gems/dm-core-0.9.10/lib/dm-core/support/
kernel.rb:6:in `repository'
/usr/local/lib/ruby/gems/1.8/gems/dm-core-0.9.10/lib/dm-core.rb:
181:in `repository'
/usr/local/lib/ruby/gems/1.8/gems/dm-core-0.9.10/lib/dm-core/
repository.rb:44:in `scope'
/usr/local/lib/ruby/gems/1.8/gems/dm-core-0.9.10/lib/dm-core.rb:
181:in `repository'
/usr/local/lib/ruby/gems/1.8/gems/dm-core-0.9.10/lib/dm-core/support/
kernel.rb:6:in `repository'
/usr/local/lib/ruby/gems/1.8/gems/dm-core-0.9.10/lib/dm-core/
associations/relationship.rb:172:in `with_repository'
/usr/local/lib/ruby/gems/1.8/gems/dm-core-0.9.10/lib/dm-core/
associations/relationship.rb:80:in `get_children'
/usr/local/lib/ruby/gems/1.8/gems/dm-core-0.9.10/lib/dm-core/
associations/one_to_many.rb:251:in `children'
/usr/local/lib/ruby/gems/1.8/gems/dm-core-0.9.10/lib/dm-core/
associations/one_to_many.rb:309:in `method_missing'
any suggestions pls?
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