undefined method `prepare_key'

[LaurensN]

After bundle install, migrations, when starting server or console I get the following error:

/translation_helpers.rb:60:in translate_with_adding': undefined methodprepare_key' for #I18n::Backend::Simple:0x007f8ba7554d50 (NoMethodError)

Rails 4.2.4

This happens with the following translation_center.yml settings:

development:
enabled: true # default false

Keys inspector allowed values:

"missing" to inspect only untranslated keys

"all" to enable inspector for translated and untranslated keys

"off" to turn off keys inspector

inspector: 'all' # default missing

I18n.translate source

i18n_source: 'yaml' # can be db or yaml; default is db

when a new key is added to db, the value of the key is added as the default translation in English

save_default_translation: false

<<: *common_atts

[LaurensN]

This can be fixed by including it in I18n::Backend::Simple:

master...LaurensN:master

[scarroll32]

I'm having the same problem on branch hzbadr#2

rake translation_center:synch
rake aborted!
NoMethodError: undefined method `prepare_key' for #<I18n::Backend::Simple:0x007fbfc2ae0978>
/Users/sean/src/seanfcarroll/immersive/app/admin/dashboard.rb:1:in `<top (required)>'
/Users/sean/src/seanfcarroll/immersive/config/routes.rb:12:in `block (2 levels) in <top (required)>'
/Users/sean/src/seanfcarroll/immersive/config/routes.rb:9:in `block in <top (required)>'
/Users/sean/src/seanfcarroll/immersive/config/routes.rb:3:in `<top (required)>'
/Users/sean/src/seanfcarroll/immersive/config/environment.rb:6:in `<top (required)>'

[scarroll32]

Solved by adding this to an initializer

I18n::Backend::Simple.send(:include, TranslationCenter)

Don't really understand why this is necessary