Jul 13 - Optimize code

app/models/category.py

@@ -14,6 +14,7 @@ Supported types: text, number, select, bool. `hot:true` marks a field whose
 value is denormalized onto an indexed Listing column for fast filtering.
 """
 from datetime import datetime
+from app.utils.time import utcnow
 from sqlalchemy import JSON
 from app.extensions import db
 
@@ -33,9 +34,9 @@ class Category(db.Model):
     sponsor_id = db.Column(db.BigInteger, nullable=True)  # FK wired in Phase 5
     is_active = db.Column(db.Boolean, nullable=False, default=True)
 
-    created_at = db.Column(db.DateTime, default=datetime.utcnow, nullable=False)
-    updated_at = db.Column(db.DateTime, default=datetime.utcnow,
-                           onupdate=datetime.utcnow, nullable=False)
+    created_at = db.Column(db.DateTime, default=utcnow, nullable=False)
+    updated_at = db.Column(db.DateTime, default=utcnow,
+                           onupdate=utcnow, nullable=False)
 
     children = db.relationship("Category", backref=db.backref("parent",
                                remote_side=[id]), lazy="selectin")