Question

I’m just trying to understand just the basic response here. I have an unedited controller method

  def update
    @ledgeritem = Ledgeritem.find(params[:id])

    respond_to do |format|
      if @ledgeritem.update_attributes(params[:ledgeritem])
        format.html { redirect_to @ledgeritem, :notice => 'Ledgeritem was successfully updated.' }
        format.json { head :no_content }
      else
        format.html { render :action => "edit" }
        format.json { render :json => @ledgeritem.errors, :status => :unprocessable_entity }
      end
    end
  end

And my ajax

$.ajax({
    type: "PUT",
    url: "/ledgeritems/" + id + ".json",
    data: $(this).serialize(),
    dataType: "json",
    success: function (result) {
        alert(result);
    }
});

My alert never shows, but the item does update. What’s the correct way to read and handle the json response? I know this is a basic question, but I can’t find any examples or information on this.

Answer 1

In your controller, change

format.json { head :no_content }

to

format.json { render json: @ledgeritem }

head :no_content would just return the http code 204, which is to signify that there is no content on the page. You do not need this here.