controllers - support_calls_controller.rb

class SupportCallsController < ApplicationController
  def new
    @support_call = SupportCall.new
    @customers = Customer.all
  end

  def create
    @support_call = SupportCall.new(params[:support_call])

    respond_to do |format|
      if @support_call.save
        format.html { redirect_to @support_call }
        format.js
      else
        format.html { render :action => "new" }
        format.js
      end
    end
  end

  def edit
    @support_call = SupportCall.find(params[:id])
    @customer = Customer.find(@support_call.customer_id)
    @customers = Customer.all
  end

  def show
    if session[:employee_first_name]
      redirect_to :action => 'edit', :id => params[:id]
      return
    else
      @support_call = SupportCall.find(params[:id])
      @customer = Customer.find(@support_call.customer)
    end
  end

  def update
    @support_call = SupportCall.find(params[:id])
    if @support_call.update_attributes(params[:support_call])
      redirect_to @support_call, :notice => 'Call was sucessfully updated.'
    else
      render :action => 'edit'
    end
  end
end

models - customer.rb

class Customer < ActiveRecord::Base
	validates :name,    :presence => true
	validates :address, :presence => true,
	                    :length => { :minimum => 5 }
	has_many :phone_numbers
	has_many :support_calls

	def self.search(search)
          if search
	    find(:all, :conditions => ['name LIKE ?', "%#{search}%"])
    else
      find(:all)
    end
  end
end

models - support_call.rb

class SupportCall < ActiveRecord::Base
  belongs_to :customer
  belongs_to :employee
  
  def self.find_from_customer_id(customer_id)
    find :all, :conditions => ['customer_id =  ?', "%#{customer_id}%"]
  end
end

views - support_calls - _form.html.erb

<%= form_for(@support_call) do |f| %>
  <div class="field">
    <%= f.label :customer %><br />
    <%= select_tag "support_call[customer_id]", options_from_collection_for_select(@customers, "id", "name") %> 
    #User input from this dropdown box does not appear in the database. :-/
  </div>
  <div class="field">
    <%= f.label :caller %><br />
    <%= f.text_field :caller %>
  </div>
  <div class="field">
    <%= f.label :phone_number %><br />
    <%= f.text_field :phone_number %>
  </div>
  <div class="field">
    <%= f.label :email %><br />
    <%= f.email_field :email %>
  </div>
  <div class="field">
    <%= f.label :csr %><br />
    <%= f.text_field :csr %>
  </div>
  <div class="textarea">
    <%= f.label :problem %><br />
    <%= f.text_area :problem, :cols => 30, :rows => 3 %>
  </div>
  <div class="textarea">
    <%= f.label :answer %><br />
    <%= f.text_area :answer, :cols => 30, :rows => 3 %>
  </div>
  <div class="checkbox">
    <%= f.check_box :resolved %> <%= f.label :resolved %>
  </div>

  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>