Thanks for your time.
I am working on rails 3.2 and I am using gems simple_form, cocoon, and rails3-jquery-autocomplete.
I have following models Machine, Part, PartUsage, MachineCosting and PartCosting
Machine and Part models with many-to-many association.
class Machine < ActiveRecord::Base
attr_accessible :name
has_many :part_usages
has_many :parts, :through => :part_usage
end
class Part < ActiveRecord::Base
attr_accessible :name
end
class PartUsage < ActiveRecord::Base
attr_accessible :machine_id,
:part_id
belongs_to :part
belongs_to :machine
end
MachineCosting and PartCosting models with one-to-many association.
class MachineCosting < ActiveRecord::Base
attr_accessible :machine_id,
:total_cost,
:machine_name,
:part_costings_attributes
attr_accessor :machine_name
has_many :part_costings, :dependent => :destroy
accepts_nested_attributes_for :part_costings, :allow_destroy => true
def machine_name
self.machine.try(:name)
end
end
class PartCosting < ActiveRecord::Base
attr_accessible :part_id,
:part_name,
:cost
attr_accessor :part_name
belongs_to :machine_costing
belongs_to :part
def part_name
self.part.try(:name)
end
end
Form for MachineCosting
views/machine_costings/_form.html.erb <%= simple_form_for(@machine_costing, :html => {:multipart => true}) do |f| %>
<%= f.input :machine_id, :url => autocomplete_machine_id_machines_path,
:as => :autocomplete %>
<!-- HERE, WHENEVER I SELECT A MACHINE, I WANT TO ADD NESTED-FORMS FOR
PARTCOSTINGS CORRESPONDING TO ALL THE PARTS OF THE MACHINE I JUST SELECTED.-->
<%= f.simple_fields_for :part_costings do |part_costing|%>
<%= render 'part_costings/part_costing_fields', :f => part_costing %>
<% end %>
<% end %>
Please suggest how can I populate and dynamically add fixed no of fields for PartCostings using javascript after machine_id is selected in the field.
I would be happy to provide any more information.
Thanks again!!
First, summary of my approach.
Now here is how I have done it (code part).
views/machine_costings/_form.html.erb
<%= simple_form_for(@machine_costing, :html => {:multipart => true}) do |f| %>
<%= f.error_notification %>
<%= f.input :machine_name, :url => autocomplete_machine_name_machines_path,
:as => :autocomplete, :input_html => { :id_element => "#machine_costing_machine_id"} %>
<%= f.association :machine, :as => :hidden %>
<div id='part_costings'>
<%= f.simple_fields_for(:part_costings) do |part_costing|%>
<%= render 'part_costings/part_costing_fields', :f => part_costing %>
<% end %>
<div class="links hidden">
<%= link_to_add_association 'Add part costings', f, :part_costings,
:partial => 'part_costings/part_costing_fields' %>
</div>
</div>
<%= f.button :submit%>
<% end %>
views/part_costings/_part_costing_fields.html.erb
<div class= 'nested-fields'>
<!-- DO NOT CHANGE THE ORDER OF ATTRIBUTES ELSE machine_costing.js WILL FAIL -->
<%= f.input :part_id, :as=> :hidden %>
<%= f.text_field :part_name, :disabled => 'disabled' %>
<%= f.input :cost %>
<%= link_to_remove_association '<i class="icon-remove"></i>'.html_safe, f ,:class =>"part_costing_remove" %>
</div>
controllers/machines_controller.rb
class MachinesController < ApplicationController
# OVER RIDING THIS BY OWN METHOD
# autocomplete :machine, :name, :full=> true, :extra_data => [:machine_id]
def autocomplete_machine_name
respond_to do |format|
format.json {
@machines = Machine.where("name ilike ?", "%#{params[:term]}%")
render json: json_for_autocomplete_machines(@machines)
}
end
end
def json_for_autocomplete_machines(machines)
machines.collect do |machine|
parts = Hash.new
unless machine.part_usages.empty?
machine.part_usages.each do |part_usage|
parts[part_usage.part.id] = part_usage.part.name
end
end
hash = {"id" => machine.id.to_s, "value" => machine.name,
"parts" => parts}
hash
end
end
#
#
#
end
And here is the javascript part.
assest/javascripts/machine_costings.js
$(function() {
// Part Costings
var part_id;
var part_name;
$('#machine_costing_machine_name').bind('railsAutocomplete.select', function(event, data){
console.debug("Machine selected...");
parts = data.item.parts;
console.debug("Removing existing part_costings...");
$('.part_costing_remove').click();
console.debug("Adding part_costings...");
for(var id in parts) {
part_id = id;
part_name = parts[id];
$('.add_fields').click();
}
console.debug("Done adding all part_costings...");
});
$('#part_costings').bind('cocoon:after-insert', function(e, part_costing) {
part_costing[0].getElementsByTagName('input')[0].value = part_id;
part_costing[0].getElementsByTagName('input')[1].value = part_name;
console.debug("Added part_costing...");
});
});
routes.rb
resources :machines do
get :autocomplete_machine_name, :on => :collection
end
The critical points in javascript solution are...
Method "bind('railsAutocomplete.select', function(event, data)" from rail3-jquery-autocomplete gem.
Method "bind('cocoon:after-insert', function(e, part_costing)" from cocoon gem.
That's all. Please let me know if you have some suggestions. Thanks :)