refactoring models _to_serialize property

ihatemoney/models.py

@@ -13,11 +13,6 @@ db = SQLAlchemy()
 
 class Project(db.Model):
 
-    _to_serialize = (
-        "id", "name",  "contact_email", "members", "active_members",
-        "balance"
-    )
-
     id = db.Column(db.String(64), primary_key=True)
 
     name = db.Column(db.UnicodeText)
@@ -25,6 +20,17 @@ class Project(db.Model):
     contact_email = db.Column(db.String(128))
     members = db.relationship("Person", backref="project")
 
+    @property
+    def _to_serialize(self):
+        return {
+            "id": self.id,
+            "name": self.name,
+            "contact_email": self.contact_email,
+            "members": self.members,
+            "active_members": self.active_members,
+            "balance": self.balance,
+        }
+
     @property
     def active_members(self):
         return [m for m in self.members if m.activated]
@@ -276,8 +282,6 @@ class Person(db.Model):
 
     query_class = PersonQuery
 
-    _to_serialize = ("id", "name", "weight", "activated")
-
     id = db.Column(db.Integer, primary_key=True)
     project_id = db.Column(db.String(64), db.ForeignKey("project.id"))
     bills = db.relationship("Bill", backref="payer")
@@ -286,6 +290,15 @@ class Person(db.Model):
     weight = db.Column(db.Float, default=1)
     activated = db.Column(db.Boolean, default=True)
 
+    @property
+    def _to_serialize(self):
+        return {
+            "id": self.id,
+            "name": self.name,
+            "weight": self.weight,
+            "activated": self.activated,
+        }
+
     def has_bills(self):
         """return if the user do have bills or not"""
         bills_as_ower_number = db.session.query(billowers)\
@@ -330,9 +343,6 @@ class Bill(db.Model):
 
     query_class = BillQuery
 
-    _to_serialize = ("id", "payer_id", "owers", "amount", "date",
-                     "creation_date", "what")
-
     id = db.Column(db.Integer, primary_key=True)
 
     payer_id = db.Column(db.Integer, db.ForeignKey("person.id"))
@@ -345,6 +355,18 @@ class Bill(db.Model):
 
     archive = db.Column(db.Integer, db.ForeignKey("archive.id"))
 
+    @property
+    def _to_serialize(self):
+        return {
+            "id": self.id,
+            "payer_id": self.payer_id,
+            "owers": self.owers,
+            "amount": self.amount,
+            "date": self.date,
+            "creation_date": self.creation_date,
+            "what": self.what,
+        }
+
     def pay_each(self):
         """Compute what each share has to pay"""
         if self.owers:

ihatemoney/utils.py

@@ -192,11 +192,7 @@ class IhmJSONEncoder(JSONEncoder):
     Taken from the deprecated flask-rest package."""
     def default(self, o):
         if hasattr(o, "_to_serialize"):
-            # build up the object
-            data = {}
-            for attr in o._to_serialize:
-                data[attr] = getattr(o, attr)
-            return data
+            return o._to_serialize
         elif hasattr(o, "isoformat"):
             return o.isoformat()
         else: