#4078 field_error_proc 'error_message undefined method' in rails 3.pre - Ruby on Rails

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#4078 ✓resolved

field_error_proc 'error_message undefined method' in rails 3.pre

Reported by Cam Caine | March 1st, 2010 @ 03:35 PM

I am trying to override the field_error_proc:

ActionView::Base.field_error_proc = Proc.new do |html, instance|
%(#{html} #{instance.error_message}) end

but it throws this error:

ActionView::Template::Error (undefined method error_message' for #<ActionView::Helpers::InstanceTag:0x0000010361b798>)

Has error_message been changed/deprecated?

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ieuser March 10th, 2010 @ 10:41 PM
it works but outputs safe html instead of the raw version

ActionView::Base.field_error_proc = Proc.new { |html_tag, instance|
"

try to add raw and it doesnt like it..
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Cam Caine March 10th, 2010 @ 11:33 PM
- Tag set to “actionview”
I think if you try adding .html_safe on the string output it works, but I am more concerned with getting what was instance.error_message but now errors.on is [] I dont see how to get it?
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YoNoSoyTu March 15th, 2010 @ 06:18 PM
I have the same problem:

undefined method error_message' for #<ActionView::Helpers::InstanceTag:0x40be40c>

Looking at the code (both Rails-3.0.0.beta and Edge in GitHub) at the bottom of active_model_helper.rb (http://github.com/rails/rails/blob/master/actionpack/lib/action_vie...) you can see that ActiveRecordInstanceTag has not that method defined.

I have prepared a patch which fixes the omission and includes a test.
- 0001-recovers-error_messages-for-activerecordinstancetag.patch 2.4 KB
Repository March 27th, 2010 @ 08:56 AM
- State changed from “new” to “resolved”
(from [334983eca042b5016d3d79d7ed5761b60ba871ed]) Recovers error_messages for ActiveRecordInstanceTag. [#4078 state:resolved]

Signed-off-by: wycats wycats@gmail.com
http://github.com/rails/rails/commit/334983eca042b5016d3d79d7ed5761...

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