Added UnixTimestamp type to Marshmallow Schemas

Added marshmallow to requirements.txt. Removed comments from app.py. Added UnixTimestamp type to schema.py

news/app.py

@@ -55,7 +55,6 @@ def get_source(session: Session, id: int):
 
 def get_articles(session: Session):
     articles = session.query(NewsArticle).all()
-    # return [article.to_dict() for article in articles]
     return http.Response(news_article_schema.dump(articles, many=True).data, status=200)
 
 

news/schema.py

@@ -4,16 +4,41 @@ from marshmallow import Schema, fields
 
 
 class PassDateTime(fields.DateTime):
+    """Used to Pass Datetime deserialization """
     def _deserialize(self, value, attr, data):
         if isinstance(value, dt.datetime):
             return value
         return super()._deserialize(value, attr, data)
 
 
+# TODO Write a better doc you fool
+class UnixTimestamp(fields.DateTime):
+    """A datetime unix timesstamp in UTC.
+
+    Example: ``1513906064.678202``
+
+    FIX THIS PART
+
+    Timezone-naive `datetime` objects are converted to
+    UTC (+00:00) by :meth:`Schema.dump <marshmallow.Schema.dump>`.
+    :meth:`Schema.load <marshmallow.Schema.load>` returns `datetime`
+    objects that are timezone-aware.
+
+    :param str format: Either ``"rfc"`` (for RFC822), ``"iso"`` (for ISO8601),
+        or a date format string. If `None`, defaults to "iso".
+    :param kwargs: The same keyword arguments that :class:`Field` receives.
+    """
+
+    def _serialize(self, value, attr, obj):
+        if value is None:
+            return None
+        return value.timestamp()
+
+
 class NewsSourceSchema(Schema):
     id = fields.Int(dump_only=True)
-    created_date = fields.DateTime(dump_only=True)
-    modified_date = fields.DateTime(dump_only=True)
+    created_date = UnixTimestamp(dump_only=True)
+    modified_date = UnixTimestamp(dump_only=True)
     url = fields.URL()
     source_name = fields.Str(required=True, error_messages={'required': 'NewsSource name is a required field'})
     source_type = fields.Str(required=True, error_messages={'required': 'NewsSource type is a required field'})
@@ -23,11 +48,11 @@ class NewsSourceSchema(Schema):
     class Meta:
         ordered = True
 
-
+# TODO deserialization of timestamp to
 class NewsArticleSchema(Schema):
     id = fields.Int(dump_only=True)
-    created_date = fields.DateTime(dump_only=True)
-    modified_date = fields.DateTime(dump_only=True)
+    created_date = UnixTimestamp(dump_only=True)
+    modified_date = UnixTimestamp(dump_only=True)
     news_source_id = fields.Int(required=True, error_messages={
         'required': 'A NewsArticle must include a NewsSource identified by NewsSource.id'}
                                 )

requirements.txt

@@ -8,6 +8,7 @@ idna==2.6
 itypes==1.1.0
 Jinja2==2.9.6
 MarkupSafe==1.0
+marshmallow==2.15.0
 psycopg2==2.7.3.2
 py==1.4.34
 pytest==3.2.3