# TypeError: Effect\[effect\_class\] when using block form of link\_to helper **URL:** \ **Category:** Rails\ **Created:** [December 11, 2007, 5:27am UTC](https://www.ruby-forum.com/t/typeerror-effect-effect-class-when-using-block-form-of-link-to-helper/122714 "2007-12-11T05:27:26Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![acampos](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/919ad9/32.png) [@acampos](https://www.ruby-forum.com/u/acampos)\ **Post date:** [December 11, 2007, 5:27am UTC](https://www.ruby-forum.com/t/typeerror-effect-effect-class-when-using-block-form-of-link-to-helper/122714/1 "2007-12-11T05:27:26Z")
Anyone have any idea why I’m getting this error when using the block form of the link\_to helper in Rails 2.0.1? I’m essentially using the exact same code as in the Rails doc example, but no luck. Any help would be appreciated. ---
**Author:** ![acampos](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/919ad9/32.png) [@acampos](https://www.ruby-forum.com/u/acampos)\ **Post date:** [December 11, 2007, 6:12am UTC](https://www.ruby-forum.com/t/typeerror-effect-effect-class-when-using-block-form-of-link-to-helper/122714/2 "2007-12-11T06:12:25Z")
Sorry, meant link\_to\_function, not link\_to. ---
**Author:** ![acampos](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/919ad9/32.png) [@acampos](https://www.ruby-forum.com/u/acampos)\ **Post date:** [December 11, 2007, 6:23am UTC](https://www.ruby-forum.com/t/typeerror-effect-effect-class-when-using-block-form-of-link-to-helper/122714/3 "2007-12-11T06:23:34Z")
Could you show us the exact code you’re using please? On Dec 11, 2007 1:31 PM, bigbanger [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Sorry, meant link\_to\_function, not link\_to. > > On Dec 10, 6:53 pm, bigbanger [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > Anyone have any idea why I’m getting this error when using the block > > form of the link\_to helper in Rails 2.0.1? I’m essentially using the > > exact same code as in the Rails doc example, but no luck. Any help > > would be appreciated. – Ryan B. > **[frozenplague.net](http://www.frozenplague.net)** > > This domain may be for sale! ---
**Author:** ![acampos](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/919ad9/32.png) [@acampos](https://www.ruby-forum.com/u/acampos)\ **Post date:** [December 11, 2007, 6:44am UTC](https://www.ruby-forum.com/t/typeerror-effect-effect-class-when-using-block-form-of-link-to-helper/122714/4 "2007-12-11T06:44:01Z")
Ryan, I’m using the following code in my .rhtml file: \<%= link\_to\_function(“show”, nil, :id =\> “more\_link”, :class =\> “expand\_collapse”) do |page| page[:user\_listings].visual\_effect :toggle\_appear page[:more\_link].replace\_html “hide” end %\> ---
**Author:** ![acampos](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/919ad9/32.png) [@acampos](https://www.ruby-forum.com/u/acampos)\ **Post date:** [December 11, 2007, 8:44am UTC](https://www.ruby-forum.com/t/typeerror-effect-effect-class-when-using-block-form-of-link-to-helper/122714/5 "2007-12-11T08:44:02Z")
I should have mentioned that ‘user\_listings’ is the id of a div defined on my page. ---
**Author:** ![acampos](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/919ad9/32.png) [@acampos](https://www.ruby-forum.com/u/acampos)\ **Post date:** [December 11, 2007, 9:31am UTC](https://www.ruby-forum.com/t/typeerror-effect-effect-class-when-using-block-form-of-link-to-helper/122714/6 "2007-12-11T09:31:28Z")
I was not aware you could use link\_to\_function as a block. It has something to do with your :toggle\_appear custom function at a guess. link\_to\_function(“show”, nil, { :id =\> “more\_link”, :class =\> “expand\_collapse” } ) On Dec 11, 2007 1:53 PM, bigbanger [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > ``` > > link_to_function("show", nil, :id => "more_link", :class => > > > > ``` > > > > > On Dec 11, 2007 1:31 PM, bigbanger [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > > > > > > would be appreciated. > > > > > – > > > Ryan B.[http://www.frozenplague.net](http://www.frozenplague.net) – Ryan B. > **[frozenplague.net](http://www.frozenplague.net)** > > This domain may be for sale! ---
**Author:** ![acampos](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/919ad9/32.png) [@acampos](https://www.ruby-forum.com/u/acampos)\ **Post date:** [December 11, 2007, 1:13pm UTC](https://www.ruby-forum.com/t/typeerror-effect-effect-class-when-using-block-form-of-link-to-helper/122714/7 "2007-12-11T13:13:32Z")
It’s in the Rails docs here: [ActionView::Helpers::JavaScriptHelper](http://api.rubyonrails.org/classes/ActionView/Helpers/JavaScriptHelper.html#M001048). Specifically, this part: “The function argument can be omitted in favor of an update\_page block, which evaluates to a string when the template is rendered (instead of making an Ajax request first).” Followed by an example similar to the one I posted. ---
**Author:** ![acampos](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/919ad9/32.png) [@acampos](https://www.ruby-forum.com/u/acampos)\ **Post date:** [December 11, 2007, 1:20pm UTC](https://www.ruby-forum.com/t/typeerror-effect-effect-class-when-using-block-form-of-link-to-helper/122714/8 "2007-12-11T13:20:33Z")
- It has something to do with your :toggle\_appear custom function at a guess. - AFAIK, there is no toggle\_appear visual effect. It’s either toggle, or appear. Not both. On Dec 11, 2007 2:09 PM, Ryan B. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > block, which evaluates to a string when the template is rendered > > > > > link\_to\_function(“show”, nil, { :id =\> “more\_link”, :class =\> > > > > > > > > ``` > > > > > end > > > > > > > > > > ``` > > > > > > > > > > > would be appreciated. > > > > > > > > – > > > > > > > > Ryan B. > > > > > > > > [http://www.frozenplague.net](http://www.frozenplague.net) – Ryan B. > **[frozenplague.net](http://www.frozenplague.net)** > > This domain may be for sale! ---
**Author:** ![acampos](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/919ad9/32.png) [@acampos](https://www.ruby-forum.com/u/acampos)\ **Post date:** [December 11, 2007, 1:17pm UTC](https://www.ruby-forum.com/t/typeerror-effect-effect-class-when-using-block-form-of-link-to-helper/122714/9 "2007-12-11T13:17:03Z")
On Dec 11, 2007 2:04 PM, bigbanger [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Followed by an example similar to the one I posted. > > > On Dec 11, 2007 1:53 PM, bigbanger [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > > > > On Dec 10, 7:02 pm, “Ryan B.” [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > > > > > > > > > form of the link\_to helper in Rails 2.0.1? I’m essentially > > > > > > > Ryan B.[http://www.frozenplague.net](http://www.frozenplague.net) – Ryan B. > **[frozenplague.net](http://www.frozenplague.net)** > > This domain may be for sale!