Looking for make when installing Gem

Sometimes you run into this:


Installing json (1.6.3) with native extensions
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
C:/Ruby192/bin/ruby.exe extconf.rb
creating Makefile

make
'make' is not recognized as an internal or external command,
operable program or batch file.


The gem you are trying to install needs some basic development tools normally found on a Linux/Unix box but not on Windows.

Go here to solve this problem:DevKit for Windows

There are very simple download and install instructions.

Consuming ID returned by JQuery Autocomplete

This autocompete definition in Participants controller:

autocomplete :participant, :full_name, :display_value => :full_name, :full => true

and this pair of Rails tags:

<%= f.autocomplete_field :name,  
     autocomplete_participant_name_students_path, 
     :id_element => '#participantt_id' %>
  
<%= hidden_field :participant, :id %>

resulting in this HTML

<input data-autocomplete="/participant/autocomplete_participant_full_name"      
  id="full_name" 
  id_element="#participant_id"
  name="full_name" type="text" value="" />  
<input id="participant_id" name="participant[id]" type="hidden" />

does the trick for delivering ID of object found from autocomplete into hidden input field. The value is, then, of course, available as a request parameter when enclosing form is submitted. Your controller accesses this param as such:

Participant.find(params[:participant][:id])


I have tested this in both 0.6.1 and 1.0.4 versions of rails3-jquery-autocomplete gem, using Rails 3.1.1.