kwatch-merb_helpers_monkey

====== README

About

merb_helpers_monkey is a Merb plug-in to extend the following helper methods.

• radio_button() to take boolean value as :checked options.
• fields_for(), form_for(), and fieldset_for() to take :index_by option.

Install

install gem

$ sudo gem install merb_helpers_monkey --source=http://gems.github.com

add 'dependency "merb_helpers_monkey"

$ vi config/dependencies.rb

Usage

radio_button()

In Merb, 'radio_button :checked=>true' and 'radio_button :checked=>false' will genereate:

<input type="radio" checked="true" />
<input type="radio" checked="false" />

But the following output should be generated:

<input type="radio" checked="checked" />
<input type="radio" />

Merb_helpers_monkey extends radio_button() to generate the above tag. So you can write such as 'radio_button :checked=>(params[:foo]="y")'.

fields_for(), form_for(), fieldsset_for()

These methods are extended to accept new ':index_by' option.

For example:

<% @users.each do |user| %>
<%=  fields_for user, :index_by => :id do %>
<p>
  <%= text_field :name, :label => 'Name' %>
  <%= text_field :mail, :label => 'Mail' %>
</p>
<%   end =%>
<% end %>

will generate:

<p>
  <label for="user_name_101">Name</label>
  <input type="text" name="user[101][name]" id="user_name_101" value="Foo" />
  <label for="user_mail_101">Mail</label>
  <input type="text" name="user[101][mail]" id="user_mail_101" value="[e-mail]" />
</p>
<p>
  <label for="user_name_102">Name</label>
  <input type="text" name="user[102][name]" id="user_name_102" value="Bar" />
  <label for="user_mail_102">Mail</label>
  <input type="text" name="user[102][mail]" id="user_mail_102" value="[e-mail]" />
</p>

and the following parameters will be sent:

params = {
  :user => {
    "101" => { :name => "Foo", :mail => "[e-mail]" },
    "102" => { :name => "Bar", :mail => "[e-mail]" },
  }
}

So you can define controller action like the following:

def update
  params[:user].each do |user_id, values|
    user = User.get(ur_id)  or raise NotFound
    user.update_attribute(values)
    ...
  end
end

Author

makoto kuwata <kwa(at)kuwata-lab.com> copyright(c) 2008 kuwata-lab.com all rights reserved.

License

MIT License