Rails 2.0 to_xml error

eggie5 · October 5, 2007, 3:00am

I'm trying out the rails 2.0 preview release. Before, I upgraded my
Videos table used to serialize to xml with no errors. Now I get this:

Video.find(1)

=> #<Video id: 1, x: 128, y: 96, max_time: 0, max_file: 200000, mp4:
false, m3gp: false, m3g2: true, mp3g4: true, h263: false, g264: false,
amr: false, aac: false, qclep: true>

Video.find(1).to_xml

ArgumentError: wrong number of arguments (0 for 1)
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serializers/
xml_serializer.rb:292:in `y'
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serializers/
xml_serializer.rb:292:in `send'
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serializers/
xml_serializer.rb:292:in `compute_value'
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serializers/
xml_serializer.rb:247:in `initialize'
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serializers/
xml_serializer.rb:166:in `new'
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serializers/
xml_serializer.rb:166:in `serializable_attributes'
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serializers/
xml_serializer.rb:166:in `collect'
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serializers/
xml_serializer.rb:166:in `serializable_attributes'
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serializers/
xml_serializer.rb:177:in `add_attributes'
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serializers/
xml_serializer.rb:233:in `serialize'
        from /usr/local/lib/ruby/gems/1.8/gems/
activesupport-1.4.2.7707/lib/active_support/vendor/builder/xmlbase.rb:
140:in `call'
        from /usr/local/lib/ruby/gems/1.8/gems/
activesupport-1.4.2.7707/lib/active_support/vendor/builder/xmlbase.rb:
140:in `_nested_structures'
        from /usr/local/lib/ruby/gems/1.8/gems/
activesupport-1.4.2.7707/lib/active_support/vendor/builder/xmlbase.rb:
60:in `method_missing'
        from /usr/local/lib/ruby/gems/1.8/gems/
activesupport-1.4.2.7707/lib/active_support/vendor/builder/xmlbase.rb:
32:in `__send__'
        from /usr/local/lib/ruby/gems/1.8/gems/
activesupport-1.4.2.7707/lib/active_support/vendor/builder/xmlbase.rb:
32:in `tag!'
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serializers/
xml_serializer.rb:232:in `serialize'
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serialization.rb:91:in
`to_s'
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serializers/
xml_serializer.rb:125:in `to_xml'
        from (irb):11>>

Here is my videos table if it helps:

class CreateVideos < ActiveRecord::Migration
def self.up
create_table :videos do |t|

    t.column :x, :integer
    t.column :y, :integer
    t.column :max_time, :integer
    t.column :max_file, :integer
    t.column :mp4, :boolean
    t.column :m3gp, :boolean
    t.column :m3g2, :boolean
    t.column :mp3g4, :boolean
    t.column :h263, :boolean
    t.column :g264, :boolean
    t.column :amr, :boolean
    t.column :aac, :boolean
    t.column :qclep, :boolean

end
end

  def self.down
    drop_table :videos
  end
end

Any ideas?

eggie5 · October 5, 2007, 4:52am

P.S. to_yaml and to_json work on this object...

eggie5 · October 5, 2007, 6:22am

Intersterting... If I don't include the y column in the table the
serialization works:

    t.column :x, :integer
    #t.column :y, :integer
    t.column :max_time, :integer
    t.column :max_file, :integer
    t.column :mp4, :boolean
    t.column :m3gp, :boolean
    t.column :m3g2, :boolean
    t.column :mp3g4, :boolean
    t.column :h263, :boolean
    t.column :g264, :boolean
    t.column :amr, :boolean
    t.column :aac, :boolean
    t.column :qclep, :boolean

Video.new.to_xml

=> "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<video>\n <aac type=
\"boolean\"></aac>\n <amr type=\"boolean\"></amr>\n <g264 type=
\"boolean\"></g264>\n <h263 type=\"boolean\"></h263>\n <m3g2 type=
\"boolean\"></m3g2>\n <m3gp type=\"boolean\"></m3gp>\n <max-file
type=\"integer\"></max-file>\n <max-time type=\"integer\"></max-time>
\n <mp3g4 type=\"boolean\"></mp3g4>\n <mp4 type=\"boolean\"></mp4>
\n <qclep type=\"boolean\"></qclep>\n <x type=\"integer\"></x>\n</

\n"

Can somebody try to reproduce this? Or is it something special with
me.

I'm on osx rails 2.0 via gem install rails --source http://gems.rubyonrails.org

eggie5 · October 5, 2007, 6:35am

Just to isolate things I created a new project with just one table
with one column.

class CreateVideos < ActiveRecord::Migration
  def self.up
    create_table :videos do |t|
      t.integer :x
      t.timestamps
    end
  end

  def self.down
    drop_table :videos
  end
end

This works, but when I rename 'x' to 'y' it .to_xml breaks again:

Video.new.to_xml

ArgumentError: wrong number of arguments (0 for 1)
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serializers/
xml_serializer.rb:292:in `y'
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serializers/
xml_serializer.rb:292:in `send'
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serializers/
xml_serializer.rb:292:in `compute_value'
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serializers/
xml_serializer.rb:247:in `initialize'
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serializers/
xml_serializer.rb:166:in `new'
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serializers/
xml_serializer.rb:166:in `serializable_attributes'
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serializers/
xml_serializer.rb:166:in `collect'
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serializers/
xml_serializer.rb:166:in `serializable_attributes'
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serializers/
xml_serializer.rb:177:in `add_attributes'
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serializers/
xml_serializer.rb:233:in `serialize'
        from /usr/local/lib/ruby/gems/1.8/gems/
activesupport-1.4.2.7707/lib/active_support/vendor/builder/xmlbase.rb:
140:in `call'
        from /usr/local/lib/ruby/gems/1.8/gems/
activesupport-1.4.2.7707/lib/active_support/vendor/builder/xmlbase.rb:
140:in `_nested_structures'
        from /usr/local/lib/ruby/gems/1.8/gems/
activesupport-1.4.2.7707/lib/active_support/vendor/builder/xmlbase.rb:
60:in `method_missing'
        from /usr/local/lib/ruby/gems/1.8/gems/
activesupport-1.4.2.7707/lib/active_support/vendor/builder/xmlbase.rb:
32:in `__send__'
        from /usr/local/lib/ruby/gems/1.8/gems/
activesupport-1.4.2.7707/lib/active_support/vendor/builder/xmlbase.rb:
32:in `tag!'
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serializers/
xml_serializer.rb:232:in `serialize'
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serialization.rb:91:in
`to_s'
        from /usr/local/lib/ruby/gems/1.8/gems/
activerecord-1.15.3.7707/lib/active_record/serializers/
xml_serializer.rb:125:in `to_xml'
        from (irb):1>>

Strange, something up with 'y'?

Here's the referenced line from the stack trace:

bitsweat · October 5, 2007, 9:17am

This is calling YAML's Kernel#y method instead of your 'y' attribute.

Attribute reader methods are defined for columns which don't already
have a method with the same name. The test for methods with the same
name has been in flux and, in this case, is casting too wide a net.

Tobi worked around the problem in
http://dev.rubyonrails.org/changeset/7731. The fix will be available
in the next preview gem or you can rake rails:freeze:edge to get it
now.

Best,
jeremy

eggie5 · October 5, 2007, 3:37pm

Thanks for confirming this.

eggie5 · October 5, 2007, 6:29pm

I just ran rake rails:freeze:edge and I still get the error:

Video.new.to_xml

ArgumentError: wrong number of arguments (0 for 1)
        from /Users/eggie5/Sites/mms-service/vendor/rails/activerecord/
lib/active_record/serializers/xml_serializer.rb:292:in `y'
        from /Users/eggie5/Sites/mms-service/vendor/rails/activerecord/
lib/active_record/serializers/xml_serializer.rb:292:in `send'
        from /Users/eggie5/Sites/mms-service/vendor/rails/activerecord/
lib/active_record/serializers/xml_serializer.rb:292:in `compute_value'

eggie5 · October 5, 2007, 6:30pm

I don't think the rails update worked because when i run scrip/console
it reports an older rails version:

alex-eggs-computer:~/sites/mms-service eggie5$ script/console
Loading development environment (Rails 1.2.4)

William_Pratt · October 5, 2007, 6:35pm

What is your RAILS_GEM_VERSION set to?

eggie5 wrote:

eggie5 · October 5, 2007, 6:42pm

alex-eggs-computer:~/sites/mms-service eggie5$ script/console
Loading development environment (Rails 1.2.4)

William_Pratt · October 5, 2007, 6:45pm

Actually, since you are using the rake method, this variable has no
impact. Sorry.

William Pratt wrote:

bitsweat · October 5, 2007, 6:59pm

See my reply to your other post about this. The version number will be
updated for official release.

Please file a ticket at http://dev.rubyonrails.org for your .to_xml issue.

Best,
jeremy

eggie5 · October 5, 2007, 7:31pm

Can you reproduce this?

eggie5 · October 5, 2007, 7:49pm

Filed bug:

http://dev.rubyonrails.org/ticket/9797

bitsweat · October 6, 2007, 1:03am

Thanks. Rick just fixed this in http://dev.rubyonrails.org/changeset/7749

jeremy

eggie5 · October 6, 2007, 1:41am

I just synched to the latest trunk (7754) and I'm still getting the
error.

Chinna1 · October 6, 2007, 5:57am

you may try gtk2

eggie5 · October 7, 2007, 4:04am

Fixed now.