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to_xml(:include => :foo) fails for :has_and_belongs_to_many association
Reported by Ron Newman | January 4th, 2010 @ 06:58 PM
If an ActiveRecord model Foo :has_and_belongs_to_many :bars , and you do this:
foo.to_xml(:include => :bar)
the result is a very confusing and uninformative
exception:
/Users/ronnewman/.gem/ruby/1.9.1/gems/activerecord-2.3.3/lib/active_record/serializers/xml_serializer.rb:323:in
compute_type': undefined methodtype' for nil:NilClass
(NoMethodError)
This is best demonstrated by example: run the attached file.
Comments and changes to this ticket
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Ron Newman January 4th, 2010 @ 07:10 PM
This happens in Rails 2.3.3 . (I don't know how to edit the 'Milestone' field of the ticket to say this.)
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Santiago Pastorino February 2nd, 2011 @ 04:50 PM
- State changed from “new” to “open”
This issue has been automatically marked as stale because it has not been commented on for at least three months.
The resources of the Rails core team are limited, and so we are asking for your help. If you can still reproduce this error on the 3-0-stable branch or on master, please reply with all of the information you have about it and add "[state:open]" to your comment. This will reopen the ticket for review. Likewise, if you feel that this is a very important feature for Rails to include, please reply with your explanation so we can consider it.
Thank you for all your contributions, and we hope you will understand this step to focus our efforts where they are most helpful.
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Santiago Pastorino February 2nd, 2011 @ 04:50 PM
- State changed from “open” to “stale”
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Andrew Ashbacher April 20th, 2011 @ 11:12 PM
This issue should probably be merged with #4840.
https://rails.lighthouseapp.com/projects/8994/tickets/4840-to_xml-d...
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Andrew Ashbacher April 20th, 2011 @ 11:50 PM
A simple solution to the original problem is not including
bar_id, a non-existent column in the serialization:foo.to_xml(:include => { :bar => { :except => :bar_id } })See my answer to this Stackoverflow question:
http://stackoverflow.com/questions/5661489/to-xml-include-doesnt-wo...
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Ron Newman