Check for member in application function, not user function

atst/domain/environment_roles.py

@@ -7,7 +7,7 @@ from atst.models import EnvironmentRole
 class EnvironmentRoles(object):
     @classmethod
     def create(cls, user, environment, role):
-        if user.is_app_member(environment.application):
+        if environment.application.has_member(user):
             env_role = EnvironmentRole(user=user, environment=environment, role=role)
             if not user.cloud_id:
                 user.cloud_id = app.csp.cloud.create_user(user)

atst/domain/environments.py

@@ -68,7 +68,7 @@ class Environments(object):
     def update_env_role(cls, environment, user, new_role):
         updated = False
 
-        if user.is_app_member(environment.application):
+        if environment.application.has_member(user):
             if new_role is None:
                 updated = EnvironmentRoles.delete(user.id, environment.id)
             else:

atst/models/application.py

@@ -52,6 +52,9 @@ class Application(
     def displayname(self):
         return self.name
 
+    def has_member(self, user):
+        return user in self.users
+
     def __repr__(self):  # pragma: no cover
         return "<Application(name='{}', description='{}', portfolio='{}', id='{}')>".format(
             self.name, self.description, self.portfolio.name, self.id

atst/models/user.py

@@ -80,9 +80,6 @@ class User(
     def displayname(self):
         return self.full_name
 
-    def is_app_member(self, application):
-        return self in application.users
-
     def __repr__(self):
         return "<User(name='{}', dod_id='{}', email='{}', has_portfolios='{}', id='{}')>".format(
             self.full_name, self.dod_id, self.email, self.has_portfolios, self.id