Jul 13 - Optimize code

app/models/ads.py

@@ -10,6 +10,7 @@ Category sponsor FK wired to categories.sponsor_id (set separately).
 PromotedKeyword: pinned listing for a search keyword (promoted search).
 """
 from datetime import datetime
+from app.utils.time import utcnow
 from app.extensions import db
 
 
@@ -37,9 +38,9 @@ class Ad(db.Model):
     clicks = db.Column(db.Integer, nullable=False, default=0)
     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)
 
     @property
     def ctr(self):
@@ -49,7 +50,7 @@ class Ad(db.Model):
 
     @property
     def is_running(self):
-        now = datetime.utcnow()
+        now = utcnow()
         return self.is_active and self.starts_at <= now <= self.ends_at
 
     def __repr__(self):
@@ -75,14 +76,14 @@ class Sponsor(db.Model):
     starts_at = db.Column(db.DateTime, nullable=False)
     ends_at = db.Column(db.DateTime, nullable=False)
     is_active = db.Column(db.Boolean, nullable=False, default=True)
-    created_at = db.Column(db.DateTime, default=datetime.utcnow, nullable=False)
+    created_at = db.Column(db.DateTime, default=utcnow, nullable=False)
 
     category = db.relationship("Category",
                                backref=db.backref("sponsors", lazy="selectin"))
 
     @property
     def is_running(self):
-        now = datetime.utcnow()
+        now = utcnow()
         return self.is_active and self.starts_at <= now <= self.ends_at
 
     def __repr__(self):
@@ -103,7 +104,7 @@ class PromotedKeyword(db.Model):
                            db.ForeignKey("listings.id"), nullable=False)
     priority = 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)
+    created_at = db.Column(db.DateTime, default=utcnow, nullable=False)
 
     listing = db.relationship("Listing",
                               backref=db.backref("promoted_keywords",
@@ -111,7 +112,7 @@ class PromotedKeyword(db.Model):
 
     @property
     def is_active(self):
-        return self.expires_at > datetime.utcnow()
+        return self.expires_at > utcnow()
 
     def __repr__(self):
         return f"<PromotedKeyword '{self.keyword}' L{self.listing_id}>"