Zhao Yi wrote:
> I use form_tag like below:
>
> <% form_tag (my_action) %>
>
> <%= submit_tag "Submit" %>
>
> <% end %>
>
> In this case, how can I pass a Ruby object to "my_action" action? I want
> to pass a Hash to the next action.
>
> thanks.
You can't pass ruby objects from the form to the controller because the
browser has no concept of ruby or rails or any of that stuff. However,
you can build a hash to put into params like this
<%= hidden_field_tag "foo[bar]", "hello" %>
which creates this situation
params => {:foo => {:bar => "hello"}}
Knowing this, you can make a hidden field tag, or set of hidden field
tags, which recreates the hash you want to pass through. Ultimately,
this is all that a form does: it builds a data structure inside params,
which is a hash that can contain other hashes, strings, and arrays.
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