Fix for mongoose 4.7

lib/crowi/index.js

@@ -143,6 +143,8 @@ Crowi.prototype.event = function(name, event) {
 
 Crowi.prototype.setupDatabase = function() {
   // mongoUri = mongodb://user:password@host/dbname
+  mongoose.Promise = global.Promise;
+
   var mongoUri = this.env.MONGOLAB_URI || // for B.C.
     this.env.MONGODB_URI || // MONGOLAB changes their env name
     this.env.MONGOHQ_URL ||

test/utils.js

@@ -7,6 +7,7 @@ var mongoUri = process.env.MONGOLAB_URI || process.env.MONGOHQ_URL || process.en
   , crowi = new (require(ROOT_DIR + '/lib/crowi'))(ROOT_DIR, process.env)
   ;
 
+mongoose.Promise = global.Promise;
 
 before('Create database connection and clean up', function (done) {
   if (!mongoUri) {