error in console: Uncaught TypeError: Accessing selectionDirection on an input element that cannot have a selection. application.js?body=1:51 Failed to load resource: the server responded with a status of 500 (Internal Server Error) http://localhost:3000/companies/5/tasks

_add_task.html.erb

<div class="add-task arrow_box hide">
 <%= form_for ([@company, @task]), :remote => true do |f| %>

 <%= f.label :description %>
 <%= f.text_field :description, :class => "input-width bottom-border" %>
 
 <%= f.label :task_category_id, "Choose a category" %>
<%= f.collection_select(:task_category_id, TaskCategory.all, :id, :task_category) %>
<%= f.label :due_date %>
 <%= f.select :due_date_word, ['Today', 'Tomorrow', 'Next Week']%>
 <%= f.submit "Add this Task", class: "btn ss" %>
 <% end %>
</div>

_tasklist.html.erb

<% current_task.todays_tasks.each_with_index do |task, i| %>
  <% if i == 0 %><strong>Today</strong><% end %>
  <%= task.description %>
<% end %>
 
<% current_task.tomorrows_tasks.each_with_index do |task, i| %>
  <% if i == 0 %><strong>Tomorrow</strong><% end %>
  <%= task.description %>
<% end %>

application.js

// This is a manifest file that'll be compiled into application.js, which will include all the files
// listed below.
//
// Any JavaScript/Coffee file within this directory, lib/assets/javascripts, vendor/assets/javascripts,
// or vendor/assets/javascripts of plugins, if any, can be referenced here using a relative path.
//
// It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
// the compiled file.
//
// WARNING: THE FIRST BLANK LINE MARKS THE END OF WHAT'S TO BE PROCESSED, ANY BLANK LINE SHOULD
// GO AFTER THE REQUIRES BELOW.
//
//= require jquery
//= require jquery_ujs
//= require jquery.nested-fields
//= require companies.js
//= require contacts.js
//= require colorbox-rails
//= require_tree .
 
$(function(){  
 
 
	$('.inline').colorbox({
		inline:true,
		height:"100%",
		width:"50%",
	});
 
	$('.submit').click(function(){
		$.ajax({ 
			url: "/companies",
			type: "POST",
			data: {post: {
				address: val,
				name: val,
				email: val,
				background: val,
			}
			}
		})
			return false;
		
	});




$('#new_task').submit(function() {

    var valuesToSubmit = JSON.stringify( $(this) );// $(this).serialize();
    $.ajax({
        url:  $(this).attr('action'), //sumbits it to the given url of the form
        data: valuesToSubmit,
        dataType: "JSON" // you want a difference between normal and ajax-calls, and json is standard
    }).success( function(json){
        
    });

    return false; // prevents normal behaviour
});	
 
	$('.submit-contacts').click(function(){
		$.ajax({ 
			url: "/contacts",
			type: "POST",
			data: {post: {
				first_name: val,
				last_name: val
			}
			}
		})
			return false;
		
	});
 
	$(".contact-card:even").addClass("pull-left");
    $(".contact-card:odd").addClass("pull-right");




 
 
});

companies_controller.rb

class CompaniesController < ApplicationController
  def index
    @companies = Company.paginate(page: params[:page], :per_page =>10)
 
    @company = Company.new
    @company.phone_numbers.build

    @due_today = Task.where(:due_date => Time.now.beginning_of_day..Time.now.end_of_day)
    # @disable_nav = true to stop a partial from displaying in a certain page using unless in application.html.erb

end

  def new
    @company = Company.new
    @company.phone_numbers.build
    
  end

  def show
    @company = Company.find(params[:id]) 
    @tasks = @company.tasks
    @contact= Contact.new
    @task= Task.new
    

    
  end


  def create
    @company = Company.create(params[:company])
    @companies = Company.paginate(page: params[:page])
    

    respond_to do |format|
      if @company.save
        format.html { render action: "index" }
        format.js
        format.json { }

      else 
        render :json => { }, status => 500
      end
    end
  end

  def edit
    @company = Company.find(params[:id])
  end

end

create.js.erb

$('#tasklist').html('<%= escape_javascript(render :partial => "tasks/tasklist", :current_task => @tasks) %>');

show.html.erb

<div class="content pull-left">
  <h2><%= @company.name %></h2>
		<%= link_to "edit company", edit_company_path %>
		<div class="margin-bottom">

			<% for phone in @company.phone_numbers %>
			<li><%= phone.number %> (<%= phone.place %>)</li>
			<% end %>
		</div>
	
		<ul class="nav nav-tabs margin-top">
			<li class="active">
				<a href="#">Contacts</a>
			</li>
			<li> <%=  link_to Deal, new_company_deal_path(@company)%></li>
			<li><a href="#">Activities</a></li>
		</ul>
		<div>
			<button class="btn btn-small btn-info" type="button">Select All</button>
			<button class="btn btn-small btn-info" type="button">Delete</button>
			<%= link_to "Add a person to this company", href="#new-contact-form", :class=>"pull-right inline"%> 
			
		</div>
<div class="x">	
	<% for contact in @company.contacts %>
		
			<div class="contact-card">
				<ul>
				<%= link_to(company_contact_path(@company,contact)) do %>
				<li><%= contact.first_name %> <%= contact.last_name %></li>
				<% end %>
				<li><%= contact.email %></li>
				<% for phone in contact.phone_numbers %>
				<li><%= phone.number %> (<%= phone.place %>)</li>
				<% end %>
				</ul>
			</div>
		
		<%= cycle('','<div  class="clearfix"></div>'.html_safe, :name=>"clearfix") %>
		
	<% end %>
</div>



<div class="hide">
	<div id="new-contact-form">
		<%= render :partial => "contacts/newcontactform", :locals => {:contact => Contact.new} %>
	</div>
</div>
</div>
<div class="sidebar pull-right">
	<div class="well sidebar-width margin-right">
		<%= link_to "Add a task", new_company_task_path(@company), :class=>'toggle' %>
		<%= render "tasks/addtask" %>
		<div id="tasklist">
		<%= render "tasks/tasklist", :current_task=>@tasks %>
		</div>
	</div>
</div>

<div class="clearfix"></div>
	

tasks_controller.rb

class TasksController < ApplicationController
  def index
  @task= Task.all
  end

  def show
    
  end

  def new
    @task = Task.new
   

  end

  

  
  def create

    company_id = params[:company_id]
    contact_id = params[:contact_id]
     
    @task = Task.new(params[:task])
      if company_id.nil? && !contact_id.nil?
        @task.contact_id = contact_id
        @task.company_id = 0
        
      elsif contact_id.nil?  && !company_id.nil?
        @task.company_id = company_id
        @task.contact_id = 0

      else
        @task.company_id = 0
        @task.contact_id = 0

        
      end


      respond_to do |format|
      if @task.save
        

        format.js 

      else 
      render 'new'
    end
  end
end
 

  def edit
  end


end