合并JWL，WZY，TRM代码
Change-Id: Ifb4fcad3c06733e1e005e7d8d9403e3561010fb4
diff --git a/Merge/back_wzy/models/behavior.py b/Merge/back_wzy/models/behavior.py
new file mode 100644
index 0000000..aed413f
--- /dev/null
+++ b/Merge/back_wzy/models/behavior.py
@@ -0,0 +1,13 @@
+# models/behavior.py
+from extensions import db
+from datetime import datetime
+
+class Behavior(db.Model):
+ __tablename__ = 'behaviors'
+
+ id = db.Column(db.BigInteger, primary_key=True)
+ user_id = db.Column(db.Integer, db.ForeignKey('users.id', ondelete='CASCADE'), nullable=False)
+ post_id = db.Column(db.Integer, db.ForeignKey('posts.id', ondelete='CASCADE'), nullable=False)
+ type = db.Column(db.Enum('like', 'comment', 'favorite', 'view', 'share'), nullable=False)
+ value = db.Column(db.Integer, default=1, nullable=False)
+ created_at = db.Column(db.DateTime, default=datetime.utcnow, nullable=False)