update base user models

{{cookiecutter.project_name}}/requirements.txt

@@ -1,3 +1,4 @@
+blinker==1.4
 Flask==0.11.1
 # Waiting on next release for a fix for libsass
 -e git+https://github.com/miracle2k/flask-assets@36da5c90cf99293ac632cfab58db52cab1c8cc83#egg=flask_assets

{{cookiecutter.project_name}}/{{cookiecutter.project_name}}/models/__init__.py

@@ -1,10 +1,30 @@
+import datetime
 import uuid
 
+from sqlalchemy import event
 from sqlalchemy.ext.declarative import AbstractConcreteBase
 
+from .. import db
+
 
 class Base(AbstractConcreteBase):
-    def __init__(self, id=None, *args, **kwargs):
+    created_at = db.Column(db.DateTime(timezone=True), nullable=False)
+    updated_at = db.Column(db.DateTime(timezone=True), nullable=False)
+
+    def __init__(self, id=None, created_at=None, updated_at=None, *args, **kwargs):
         if id is None:
             id = str(uuid.uuid4())
-        super(Base, self).__init__(id=id, *args, **kwargs)
+
+        if created_at is None:
+            created_at = datetime.datetime.now(tz=datetime.timezone.utc)
+        if updated_at is None:
+            updated_at = created_at
+
+        super(Base, self).__init__(id=id, created_at=created_at, updated_at=updated_at, *args, **kwargs)
+
+
+# Before we update our model, update its `updated_at` value
+@event.listens_for(Base, 'before_update', propagate=True)
+def base_update_updated_at(mapper, connection, model):
+    """When we update a base model, update the `updated_at` timestamp"""
+    model.updated_at = datetime.datetime.now(tz=datetime.timezone.utc)

{{cookiecutter.project_name}}/{{cookiecutter.project_name}}/models/user.py

@@ -1,8 +1,8 @@
 from flask_security import UserMixin
 from sqlalchemy.dialects.postgresql import UUID
 
-from . import Base
 from .. import db
+from . import Base
 from .user_role import user_role_map
 
 
@@ -12,5 +12,6 @@ class User(Base, db.Model, UserMixin):
     password = db.Column(db.String(255))
     active = db.Column(db.Boolean())
     confirmed_at = db.Column(db.DateTime())
+
     roles = db.relationship('Role', secondary=user_role_map,
                             backref=db.backref('users', lazy='dynamic'))