Jul 13 - Optimize code

app/models/listing.py

@@ -10,6 +10,7 @@ Portability notes (see README "MySQL upgrades"):
   MySQL add a FULLTEXT(title, body) index and switch to MATCH ... AGAINST.
 """
 from datetime import datetime
+from app.utils.time import utcnow
 from sqlalchemy import JSON, Index
 from app.extensions import db
 from app.models.enums import ListingStatus, Lang
@@ -55,9 +56,9 @@ class Listing(db.Model):
     view_count = db.Column(db.Integer, nullable=False, default=0)
     expires_at = db.Column(db.DateTime, nullable=False, index=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)
 
     user = db.relationship("User", backref=db.backref("listings", lazy="dynamic"))
     category = db.relationship("Category", back_populates="listings")
@@ -73,7 +74,7 @@ class Listing(db.Model):
     @property
     def is_live(self):
         return (self.status == ListingStatus.active
-                and self.expires_at > datetime.utcnow())
+                and self.expires_at > utcnow())
 
     @property
     def price_display(self):
@@ -101,7 +102,7 @@ class ListingImage(db.Model):
     sort_order = db.Column(db.Integer, nullable=False, default=0)
     width = db.Column(db.Integer, nullable=True)
     height = db.Column(db.Integer, nullable=True)
-    created_at = db.Column(db.DateTime, default=datetime.utcnow, nullable=False)
+    created_at = db.Column(db.DateTime, default=utcnow, nullable=False)
 
     listing = db.relationship("Listing", back_populates="images")