migrate conferences to organizations

db/migrate/20170531094817_add_organizaton_id_to_conference.rb

@@ -1,5 +0,0 @@
-class AddOrganizatonIdToConference < ActiveRecord::Migration
-  def change
-    add_column :conferences, :organization_id, :integer
-  end
-end

db/migrate/20170531094819_move_conferences_to_organizations.rb

@@ -0,0 +1,21 @@
+class MoveConferencesToOrganizations < ActiveRecord::Migration
+  class TempConference < ActiveRecord::Base
+    self.table_name = 'conferences'
+  end
+
+  class TempOrganization < ActiveRecord::Base
+    self.table_name = 'organizations'
+  end
+
+  def change
+    add_reference :conferences, :organization, index: true
+    add_foreign_key :conferences, :organizations, dependent: :delete
+
+    TempConference.reset_column_information
+    organization = TempOrganization.create(name: 'organization', description: 'Default organization to migrate old conferences to the new version of OSEM')
+    TempConference.all.each do |conference|
+      conference.organization_id = organization.id
+      conference.save!
+    end
+  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: 20170531094817) do
+ActiveRecord::Schema.define(version: 20170531094819) do
 
   create_table "ahoy_events", force: :cascade do |t|
     t.uuid     "visit_id",   limit: 16
@@ -103,6 +103,8 @@ ActiveRecord::Schema.define(version: 20170531094817) do
     t.integer  "organization_id"
   end
 
+  add_index "conferences", ["organization_id"], name: "index_conferences_on_organization_id"
+
   create_table "conferences_questions", id: false, force: :cascade do |t|
     t.integer "conference_id"
     t.integer "question_id"