add migrations

db/migrate/20160312234946_create_events.rb

@@ -0,0 +1,13 @@
+class CreateEvents < ActiveRecord::Migration
+  def change
+    create_table :events do |t|
+      t.string      :kind, limit: 255
+      t.references  :eventable, polymorphic: true, index: true
+      t.references  :user, index: true
+      t.references  :map, index: true
+      t.integer     :sequence_id, index: true, default: nil, null: true
+      t.timestamps
+    end
+    add_index :events, [:map_id, :sequence_id], unique: true
+  end
+end

db/migrate/20160312235006_create_webhooks.rb

@@ -0,0 +1,10 @@
+class CreateWebhooks < ActiveRecord::Migration
+  def change
+    create_table :webhooks do |t|
+      t.references :hookable, polymorphic: true, index: true
+      t.string :kind, null: false
+      t.string :uri, null: false
+      t.text   :event_types, array: true, default: []
+    end
+  end
+end

db/schema.rb

@@ -11,27 +11,27 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20160310200131) do
+ActiveRecord::Schema.define(version: 20160312235006) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
 
   create_table "events", force: :cascade do |t|
     t.string   "kind",           limit: 255
-    t.datetime "created_at"
-    t.datetime "updated_at"
     t.integer  "eventable_id"
-    t.string   "eventable_type", limit: 255
+    t.string   "eventable_type"
     t.integer  "user_id"
     t.integer  "map_id"
     t.integer  "sequence_id"
+    t.datetime "created_at"
+    t.datetime "updated_at"
   end
 
-  add_index "events", ["created_at"], name: "index_events_on_created_at", using: :btree
+  add_index "events", ["eventable_type", "eventable_id"], name: "index_events_on_eventable_type_and_eventable_id", using: :btree
   add_index "events", ["map_id", "sequence_id"], name: "index_events_on_map_id_and_sequence_id", unique: true, using: :btree
   add_index "events", ["map_id"], name: "index_events_on_map_id", using: :btree
-  add_index "events", ["eventable_type", "eventable_id"], name: "index_events_on_eventable_type_and_eventable_id", using: :btree
   add_index "events", ["sequence_id"], name: "index_events_on_sequence_id", using: :btree
+  add_index "events", ["user_id"], name: "index_events_on_user_id", using: :btree
 
   create_table "in_metacode_sets", force: :cascade do |t|
     t.integer  "metacode_id"