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#1472 ✓stale
Matthew Moore

ActiveResource errors.from_xml Can't handle symboled attribute keys because of humanize call

Reported by Matthew Moore | November 25th, 2008 @ 08:09 PM | in 3.x

If you look at:

    # Grabs errors from the XML response.
    def from_xml(xml)
      humanized_attributes = @base.attributes.keys.inject({}) { |h, attr_name| h.update(attr_name.humanize => attr_name) }
      messages = Hash.from_xml(xml)['errors']['error'] rescue []
      messages.each do |message|
        attr_message = humanized_attributes.keys.detect do |attr_name|
          if message[0, attr_name.size + 1] == "#{attr_name} "
            add humanized_attributes[attr_name], message[(attr_name.size + 1)..-1]

        add_to_base message if attr_message.nil?

You'll notice humanized_attributes = @base.attributes.keys.inject({}) { |h, attr_name| h.update(attr_name.humanize => attr_name) } ... and in particular, attr_name.humanize. If the attribute key is a symbol instead of a string (say you're working directly from the command line), you'll get an exception from that line:

/activeresource-2.2.2/lib/active_resource/validations.rb:205:in `from_xml': undefined method `humanize' for :[whatever attr_name is]:Symbol (NoMethodError)

It seems like this would be a simple fix (just attr_name.to_s.humanize). Is anyone else having this problem?

Comments and changes to this ticket

  • Michael Koziarski

    Michael Koziarski December 1st, 2008 @ 08:01 PM

    This sounds like a good fix to me, attach a patch with tests and we're good to go.

  • Matthew Moore

    Matthew Moore December 1st, 2008 @ 08:13 PM

    Actually I've been looking into this more, and it might be better instead to stringify_keys! in the attributes= method like ActiveRecord does. Still thinking about it...

    Do you have any thoughts on what you'd prefer?

  • Michael Koziarski

    Michael Koziarski December 1st, 2008 @ 08:15 PM

    consistency with AR is probably worth doing, plus it makes it a little less ad-hoc compared to sticking .to_s somewhere. It'll also stop any other issues from popping up later.

  • Pratik

    Pratik March 13th, 2009 @ 11:14 AM

    • Title changed from “ActiveResource 2.2.2 errors.from_xml Can't handle symboled attribute keys because of humanize call” to “ActiveResource errors.from_xml Can't handle symboled attribute keys because of humanize call”
  • Yuri

    Yuri March 13th, 2009 @ 03:40 PM

    I have just posted a bug report where the cause of the problem is this very method, though the problem is different - #2229

  • CancelProfileIsBroken

    CancelProfileIsBroken August 5th, 2009 @ 03:34 PM

    • Tag changed from activeresource, bug to activeresource, bug, bugmash
  • Dan Pickett

    Dan Pickett August 8th, 2009 @ 09:30 PM

    patch attached validated +1

    I took a swing at a patch for this to stringify the keys. pretty simple.

  • Steve St. Martin

    Steve St. Martin August 8th, 2009 @ 10:12 PM

    +1 patch applies cleanly to both 2-3-stable and master, appears to address issue and test is sufficient

  • Rizwan Reza

    Rizwan Reza August 8th, 2009 @ 10:17 PM


    +1 This patch applies to both: 2-3-stable and master cleanly.

  • Nick Quaranto

    Nick Quaranto August 8th, 2009 @ 10:17 PM

    +1, applies cleanly and passes on both 2-3-stable and master.

  • Dan Croak

    Dan Croak August 8th, 2009 @ 10:18 PM

    +1 verified in 2-3-stable.

    Patch applies cleanly. activeresource rake test runs green.

  • Greg Sterndale

    Greg Sterndale August 8th, 2009 @ 10:54 PM

    +1 verified

    patch applied, tests pass in 2-3-stable

  • Dan Croak

    Dan Croak August 10th, 2009 @ 02:41 AM

    Pratik mentioned in IRC that he'd like to see a test for from_xml added to this patch before it is committed. I started to look into it but am on another computer. If someone gets to it first, have at it!

  • Blue Box Stephen

    Blue Box Stephen September 27th, 2009 @ 01:51 AM

    +1, patch applies cleanly and passes.

    However, in 2.3-stable it looks like from_xml has been changed significantly in 2.3-stable (original code above is from 2.2.2). For example, humanize is no longer called. As such, are you sure we still need this particular test for from_xml? (See lib/active_resource/validations.rb starting line 224 in 2.3-stable).

  • sr.iniv.t

    sr.iniv.t September 27th, 2009 @ 07:34 PM

    +1 verified.

    The patch applies cleanly on 2-3-stable and tests pass. However, a different patch is needed for master because the activeresource test directory structure has changed in master.

  • Rizwan Reza

    Rizwan Reza February 12th, 2010 @ 12:46 PM

    • Tag changed from activeresource, bug, bugmash to activeresource, bug
  • Jeremy Kemper

    Jeremy Kemper May 4th, 2010 @ 06:48 PM

    • Milestone changed from 2.x to 3.x
  • Santiago Pastorino

    Santiago Pastorino February 2nd, 2011 @ 05:04 PM

    • State changed from “new” to “open”
    • Importance changed from “” to “”

    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.

  • Santiago Pastorino

    Santiago Pastorino February 2nd, 2011 @ 05:04 PM

    • State changed from “open” to “stale”

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