method for checking the availability of interface calls in a migration method

lib/migration.js

@@ -47,15 +47,35 @@ module.exports = (function() {
         method: 'up'
         method: 'up'
       }, options || {})
       }, options || {})
 
 
-      extendMigrationWithQueryInterfaceMethods.call(self, function allMethodsDone() {
-        emitter.emit('success', null)
-      })
+      var onSuccess = function() { emitter.emit('success', null) }
+        , func      = self.migration[options.method]
 
 
-      var methods = require(self.path)
-      methods[options.method].call(null, self, DataTypes)
+      extendMigrationWithQueryInterfaceMethods.call(self, onSuccess)
+      func.call(null, self, DataTypes)
+
+      if(!self.migrationHasInterfaceCalls(func))
+        onSuccess()
     }).run()
     }).run()
   }
   }
 
 
+  Object.defineProperty(Migration.prototype, 'migration', {
+    get: function() {
+      return require(this.path)
+    }
+  })
+
+  Migration.prototype.migrationHasInterfaceCalls = function(func) {
+    var functionString = Utils.removeCommentsFromFunctionString(func.toString())
+      , hasCalls       = false
+
+    for(var method in QueryInterface.prototype) {
+      var regex = new RegExp('\\.' + method)
+      hasCalls = hasCalls || regex.test(functionString)
+    }
+
+    return hasCalls
+  }
+
   Migration.prototype.isBefore = function(dateString, options) {
   Migration.prototype.isBefore = function(dateString, options) {
     options = Utils._.extend({
     options = Utils._.extend({
       withoutEquals: false
       withoutEquals: false
@@ -106,5 +126,6 @@ module.exports = (function() {
     }
     }
   }
   }
 
 
+
   return Migration
   return Migration
 })()
 })()