# Undefined method \`format\_and\_extension'

**URL:** <https://www.ruby-forum.com/t/undefined-method-format-and-extension/148832>\
**Category:** Rails\
**Created:** [September 17, 2008, 3:10pm UTC](https://www.ruby-forum.com/t/undefined-method-format-and-extension/148832 "2008-09-17T15:10:05Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![micktaiwan](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/4af34b/32.png) [@micktaiwan](https://www.ruby-forum.com/u/micktaiwan)\
**Post date:** [September 17, 2008, 3:10pm UTC](https://www.ruby-forum.com/t/undefined-method-format-and-extension/148832/1 "2008-09-17T15:10:05Z")

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Hi,

This is why I get in production, not in development:  
undefined method `format\_and\_extension’ for  
ActionView::InlineTemplate:0xb790fd28

What does this mean, a search on this error didn’t bring any results.

Thanks for any pointers…  
Mickael.

(Logs in attachement)