Fix search list, optional and attr

app/controllers/lists_controller.rb

@@ -9,13 +9,14 @@ class ListsController < ApplicationController
   # POST /lists
   #----------------------------------------------------------------------------
   def create
-    list_params[:user_id] = (current_user.id if params[:is_global].to_i.zero?)
-
+    list_attr = list_params.to_h
+    list_attr[:user_id] = (current_user.id if params[:is_global].to_i.zero?)
     # Find any existing list with the same name (case insensitive)
-    if @list = List.where("lower(name) = ?", list_params[:name].downcase).where(user_id: list_params[:user_id]).first
-      @list.update(list_params)
+
+    if @list = List.where("lower(name) = ?", list_attr[:name].downcase).where(user_id: list_attr[:user_id]).first
+      @list.update(list_attr)
     else
-      @list = List.create(list_params)
+      @list = List.create(list_attr)
     end
 
     respond_with(@list)

app/models/list.rb

@@ -8,7 +8,7 @@
 class List < ActiveRecord::Base
   validates_presence_of :name
   validates_presence_of :url
-  belongs_to :user
+  belongs_to :user, optional: true
 
   # Parses the controller from the url
   def controller