Method: ActionView::Helpers::PrototypeHelper#remote_function

Defined in:
lib/action_view/helpers/prototype_helper.rb

#remote_function(options) ⇒ Object

Returns the JavaScript needed for a remote function. See the link_to_remote documentation at github.com/rails/prototype_legacy_helper as it takes the same arguments.

Example:

# Generates: <select id="options" onchange="new Ajax.Updater('options',
# '/testing/update_options', {asynchronous:true, evalScripts:true})">
<select id="options" onchange="<%= remote_function(:update => "options",
    :url => { :action => :update_options }) %>">
  <option value="0">Hello</option>
  <option value="1">World</option>
</select>



122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
 
# File 'lib/action_view/helpers/prototype_helper.rb', line 122

def remote_function(options)
  javascript_options = options_for_ajax(options)

  update = ''
  if options[:update] && options[:update].is_a?(Hash)
    update  = []
    update << "success:'#{options[:update][:success]}'" if options[:update][:success]
    update << "failure:'#{options[:update][:failure]}'" if options[:update][:failure]
    update  = '{' + update.join(',') + '}'
  elsif options[:update]
    update << "'#{options[:update]}'"
  end

  function = update.empty? ?
    "new Ajax.Request(" :
    "new Ajax.Updater(#{update}, "

  url_options = options[:url]
  function << "'#{ERB::Util.html_escape(escape_javascript(url_for(url_options)))}'"
  function << ", #{javascript_options})"

  function = "#{options[:before]}; #{function}" if options[:before]
  function = "#{function}; #{options[:after]}"  if options[:after]
  function = "if (#{options[:condition]}) { #{function}; }" if options[:condition]
  function = "if (confirm('#{escape_javascript(options[:confirm])}')) { #{function}; }" if options[:confirm]

  return function.html_safe
end