# Acts\_as\_tree undefined method?

**URL:** <https://www.ruby-forum.com/t/acts-as-tree-undefined-method/134569>\
**Category:** Rails\
**Created:** [April 12, 2008, 6:09am UTC](https://www.ruby-forum.com/t/acts-as-tree-undefined-method/134569 "2008-04-12T06:09:03Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Ilya](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/58f4c7/32.png) [@Ilya](https://www.ruby-forum.com/u/Ilya)\
**Post date:** [April 12, 2008, 6:09am UTC](https://www.ruby-forum.com/t/acts-as-tree-undefined-method/134569/1 "2008-04-12T06:09:03Z")

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i have acts\_as\_tree installed as plugin under rails 2.0.2 and also its  
defined in class TreeItems, but when i put this in my view

Furniture \<% TreeItem.root.category.children do |cat\_children| %\> - \<%=h cat\_children.name %\> \<% end %\> 

it gives me this:

undefined method `acts\_as\_tree’ for #Class:0x2bb3f30

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<div class="post-metadata">

**Author:** ![Ilya](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/i/58f4c7/32.png) [@Ilya](https://www.ruby-forum.com/u/Ilya)\
**Post date:** [April 12, 2008, 5:59pm UTC](https://www.ruby-forum.com/t/acts-as-tree-undefined-method/134569/2 "2008-04-12T17:59:54Z")

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fixed it, restarted webrick server 😃