Create participants table

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

db/migrate/20150625153454_create_participants.rb

+class CreateParticipants < ActiveRecord::Migration
+  def change
+    create_table :participants do |t|
+      t.integer :target_id, null: false
+      t.string :target_type, null: false
+      t.integer :user_id, null: false
+
+      t.timestamps
+    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: 20150620233230) do
+ActiveRecord::Schema.define(version: 20150625153454) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -330,6 +330,14 @@ ActiveRecord::Schema.define(version: 20150620233230) do
   add_index "oauth_applications", ["owner_id", "owner_type"], name: "index_oauth_applications_on_owner_id_and_owner_type", using: :btree
   add_index "oauth_applications", ["uid"], name: "index_oauth_applications_on_uid", unique: true, using: :btree
+  create_table "participants", force: true do |t|
+    t.integer  "target_id",   null: false
+    t.string   "target_type", null: false
+    t.integer  "user_id",     null: false
+    t.datetime "created_at"
+    t.datetime "updated_at"
+  end
+
   create_table "project_import_data", force: true do |t|
     t.integer "project_id"
     t.text    "data"