add user_id to share

db/migrate/20161228071511_add_user_id_to_share.rb

@@ -0,0 +1,5 @@
+class AddUserIdToShare < ActiveRecord::Migration
+  def change
+     add_column :shares, :user_id, :integer
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20161228071235) do
+ActiveRecord::Schema.define(version: 20161228071511) do
 
   create_table "comments", force: :cascade do |t|
     t.text     "content"
@@ -66,6 +66,7 @@ ActiveRecord::Schema.define(version: 20161228071235) do
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
     t.integer  "project_id"
+    t.integer  "user_id"
   end
 
   create_table "users", force: :cascade do |t|