Create the Invitation model

calsocial/models.py

@@ -552,3 +552,28 @@ class Notification(db.Model):
         message = messages[0 if self.item == current_user.profile else 1]
 
         return lazy_gettext(message, actor=self.actor, item=self.item)
+
+
+class Invitation(db.Model):  # pylint: disable=too-few-public-methods
+    """Database model for event invitations
+    """
+
+    __tablename__ = 'invitations'
+
+    #: The ID of the sender’s profile
+    sender_id = db.Column(db.Integer(), db.ForeignKey('profiles.id'), primary_key=True)
+
+    sender = db.relationship('Profile', foreign_keys=[sender_id])
+
+    #: The ID of the invitee’s profile
+    invitee_id = db.Column(db.Integer(), db.ForeignKey('profiles.id'), primary_key=True)
+
+    invitee = db.relationship('Profile', foreign_keys=[invitee_id])
+
+    #: The ID of the event
+    event_id = db.Column(db.Integer(), db.ForeignKey('events.id'), primary_key=True)
+
+    event = db.relationship('Event', backref=db.backref('invitations', lazy='dynamic'))
+
+    #: The timestamp of the invitation
+    timestamp = db.Column(db.DateTime(), default=datetime.utcnow)