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authorkenta-s <knt01222@gmail.com>2017-02-06 21:47:07 +0900
committerkenta-s <knt01222@gmail.com>2017-02-06 21:47:08 +0900
commit3ea926b86a209d67c210fc105cadcad73984e3e0 (patch)
treed14784f98c116620e7723ac0f2873a4e712d05e0 /guides
parent2bbea8b0996a45f9bdfafe3b63f123cca4614e10 (diff)
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Add information on `:formats` option in action_view_overview.md
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-rw-r--r--guides/source/layouts_and_rendering.md2
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diff --git a/guides/source/layouts_and_rendering.md b/guides/source/layouts_and_rendering.md
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+++ b/guides/source/layouts_and_rendering.md
@@ -411,6 +411,8 @@ render formats: :xml
render formats: [:json, :xml]
```
+If a file with the specified extension does not exist, a `MissingTemplate` error will be raised.
+
#### Finding Layouts
To find the current layout, Rails first looks for a file in `app/views/layouts` with the same base name as the controller. For example, rendering actions from the `PhotosController` class will use `app/views/layouts/photos.html.erb` (or `app/views/layouts/photos.builder`). If there is no such controller-specific layout, Rails will use `app/views/layouts/application.html.erb` or `app/views/layouts/application.builder`. If there is no `.erb` layout, Rails will use a `.builder` layout if one exists. Rails also provides several ways to more precisely assign specific layouts to individual controllers and actions.