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| -rw-r--r-- | railties/guides/source/active_support_core_extensions.textile | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/railties/guides/source/active_support_core_extensions.textile b/railties/guides/source/active_support_core_extensions.textile index e56dde2977..307f7eddb3 100644 --- a/railties/guides/source/active_support_core_extensions.textile +++ b/railties/guides/source/active_support_core_extensions.textile @@ -1412,6 +1412,31 @@ end NOTE: Defined in +active_support/core_ext/string/inflections.rb+. +h5. +demodulize+ + +Given a string with a qualified constant reference expression, +demodulize+ returns the very constant name, that is, the rightmost part of it: + +<ruby> +"Product".demodulize # => "Product" +"Backoffice::UsersController".demodulize # => "UsersController" +"Admin::Hotel::ReservationUtils".demodulize # => "ReservationUtils" +</ruby> + +Active Record for example uses this method to compute the name of a counter cache column: + +<ruby> +# active_record/reflection.rb +def counter_cache_column + if options[:counter_cache] == true + "#{active_record.name.demodulize.underscore.pluralize}_count" + elsif options[:counter_cache] + options[:counter_cache] + end +end +</ruby> + +NOTE: Defined in +active_support/core_ext/string/inflections.rb+. + h3. Extensions to +Numeric+ h4. Bytes |