add web

app/models/friend_relationship.py

@@ -0,0 +1,16 @@
+from app.extensions import db
+from datetime import datetime
+
+class FriendRelationship(db.Model):
+    id = db.Column(db.BigInteger, primary_key=True, autoincrement=True, nullable=False)
+    user_id = db.Column(db.BigInteger, nullable=False, index=True)
+    friend_id = db.Column(db.BigInteger, nullable=False, index=True)
+    created_at = db.Column(db.DateTime, nullable=False)
+
+    def __init__(self, user_id, friend_id):
+        self.user_id = user_id
+        self.friend_id = friend_id
+        self.created_at = datetime.utcnow()
+
+    def __repr__(self):
+        return '<FriendRelationship %r>' % self.id