JsonCommand

example.rb

def destroy
    #...
    flash[:success] = t("entity_name.delete.success", :name => entity.name)
    respond_to do |format|
      format.html do
        redirect_to :action=>:index
      end
      format.json { render :json => {
          'delete-row'=>dom_id(entity)),
          'flash-success' => flash.discard[:success]} }
    end
end

json_command.js

JsonCommand = new function() {
    var self = this;
    function exec(data) {
        for(var prop in data) {
            if(data.hasOwnProperty(prop)) {
              if(self.hasOwnProperty(prop)) {
                  self[prop](data[prop]);
              } else {
                  alert('noop');
              }
            }
        }
    }
    this.exec = exec;
}

JsonCommand['delete-row'] = function(data) {
    $('#'+data).fadeOut();
}
JsonCommand['flash-success'] = function(data) {
        $.blockUI({
            message: data,
            fadeIn: 700,
            fadeOut: 700,
            timeout: 2000,
            showOverlay: false,
            centerY: false,
            css: {
                width: '350px',
                top: '10px',
                left: '',
                right: '10px',
                border: 'none',
                padding: '5px',
                backgroundColor: 'green',
                '-webkit-border-radius': '10px',
                '-moz-border-radius': '10px',
                opacity: .6,
                color: '#fff'
            }
        });
}


$(function() {
    $('.json-command').closest('form').attr('data-type','json').
        bind('ajax:success',function(xhr,data){
            JsonCommand.exec(data);
        }).
        bind('ajax:error', function(xhr,status, error){
            alert("Operation failed: "+error)
        });

    $('.toggler').live('click',function(ev) {
        $('#'+$(this).attr('id')+'-toggled').toggle();
    });
});