Getting MissingAttributeError when submitting a value in the form with trailing whitespace

[jmuheim]

I have a Page model that translates :title, :navigation_title, :lead, :content.

class Page < ApplicationRecord
  extend Mobility
  translates :title, :navigation_title, :lead, :content
end

I'm using the following config:

Mobility.configure do |config|
  config.default_backend = :column
  config.accessor_method = :translates
  config.query_method    = :i18n
  config.default_options = {
    fallbacks: { de: :en }
  }
end

I noticed a strange behaviour: whenever I submit a value using the form with a trailing whitespace (e.g. _x, _x_, or x_, where whitespace is substituted with an underscore) to a translated field (e.g. lead) I get the following error:

ActiveModel::MissingAttributeError at /de/pages/1
can't write unknown attribute `lead`

If I submit any other value (e.g. x`), it works perfectly.

This only happens to translated fields, not to other fields.

Any idea what's going on? I'm happy to provide more details if needed.

Here's the app I'm currently working on: jmuheim/base#86

[shioyama]

My guess would be that it's paper trail. What if you remove it and see if you see the same issue?

[shioyama]

Hmm I'm not sure what's going wrong. I can see the error running your code, but removing all other stuff from the model it still occurs. However I don't see it in isolated Mobility specs, so something in your projects setup or gemfile is conflicting I would suppose...

[shioyama]

Ah ok it's compatibility with the strip_attributes gem (should be obvious). This is not a bug but a compatibility issue.

[shioyama]

I'm probably going to have to close this since I can't really guarantee compatibility with every other gem.

[jmuheim]

Thanks a lot for finding the problem.

Do you have a more specific guess on what's the problem with strip_attributes gem? I will create an issue on its side then.

[shioyama]

@jmuheim can you try pointing your Gemfile to the branch in #102 ?

gem 'mobility', github: 'shioyama/mobility', branch: 'convert_attributemethods_to_plugin'

This branch extracts the code overriding the attributes hash into a plugin which is not enabled by default. I believe this should fix the problem with strip_attributes.