change LtiParameters Table

db/migrate/20161216130605_remove_lti_return_url_from_lti_parameter.rb

@@ -0,0 +1,5 @@
+class RemoveLtiReturnUrlFromLtiParameter < ActiveRecord::Migration
+  def change
+    remove_column :lti_parameters, :lti_return_url, :text
+  end
+end

db/migrate/20161216131239_add_lti_parameters_to_lti_parameter.rb

@@ -0,0 +1,5 @@
+class AddLtiParametersToLtiParameter < ActiveRecord::Migration
+  def change
+    add_column :lti_parameters, :lti_parameters, :json
+  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: 20160907123009) do
+ActiveRecord::Schema.define(version: 20161216131239) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -182,6 +182,15 @@ ActiveRecord::Schema.define(version: 20160907123009) do
   add_index "internal_users", ["remember_me_token"], name: "index_internal_users_on_remember_me_token", using: :btree
   add_index "internal_users", ["reset_password_token"], name: "index_internal_users_on_reset_password_token", using: :btree
 
+  create_table "lti_parameters", force: true do |t|
+    t.string   "external_user_id"
+    t.string   "consumer_id"
+    t.string   "exercise_id"
+    t.datetime "created_at"
+    t.datetime "updated_at"
+    t.json     "lti_parameters"
+  end
+
   create_table "request_for_comments", force: true do |t|
     t.integer  "user_id",       null: false
     t.integer  "exercise_id",   null: false