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-rw-r--r--guides/source/i18n.md24
1 files changed, 22 insertions, 2 deletions
diff --git a/guides/source/i18n.md b/guides/source/i18n.md
index fbee267975..4dc4c5a660 100644
--- a/guides/source/i18n.md
+++ b/guides/source/i18n.md
@@ -588,6 +588,26 @@ you can look up the `books.index.title` value **inside** `app/views/books/index.
NOTE: Automatic translation scoping by partial is only available from the `translate` view helper method.
+"Lazy" lookup can also be used in controllers:
+
+```yaml
+en:
+ books:
+ create:
+ success: Book created!
+```
+
+This is useful for setting flash messages for instance:
+
+```ruby
+class BooksController < ApplicationController
+ def create
+ # ...
+ redirect_to books_url, notice: t('.success')
+ end
+end
+```
+
### Interpolation
In many cases you want to abstract your translations so that **variables can be interpolated into the translation**. For this reason the I18n API provides an interpolation feature.
@@ -1010,7 +1030,7 @@ In other contexts you might want to change this behavior, though. E.g. the defau
module I18n
class JustRaiseExceptionHandler < ExceptionHandler
def call(exception, locale, key, options)
- if exception.is_a?(MissingTranslation)
+ if exception.is_a?(MissingTranslationData)
raise exception.to_exception
else
super
@@ -1027,7 +1047,7 @@ This would re-raise only the `MissingTranslationData` exception, passing all oth
However, if you are using `I18n::Backend::Pluralization` this handler will also raise `I18n::MissingTranslationData: translation missing: en.i18n.plural.rule` exception that should normally be ignored to fall back to the default pluralization rule for English locale. To avoid this you may use additional check for translation key:
```ruby
-if exception.is_a?(MissingTranslation) && key.to_s != 'i18n.plural.rule'
+if exception.is_a?(MissingTranslationData) && key.to_s != 'i18n.plural.rule'
raise exception.to_exception
else
super