#5 Create course endpoint. Added messages to all db migrations

backend/app/models.py

@@ -37,11 +37,24 @@ class User(UserMixin, db.Model):
         if new_user and "password" in data:
             self.set_password(data["password"])
 
+
 class Course(db.Model):
     id = sa.Column(sa.Integer, primary_key=True)
     name = sa.Column(sa.String(128), index=True)
     description = sa.Column(sa.Text, index=True)
     instructor = sa.Column(sa.ForeignKey(User.id), index=True)
-    created_at = sa.Column(sa.DateTime, default=datetime.now())
+    created_at = sa.Column(sa.DateTime)
 
+    def from_dict(self, data):
+        for field in ["name", "description", "instructor"]:
+            if field in data:
+                setattr(self, field, data[field])
 
+        if not self.created_at:
+            self.created_at = datetime.now()
+
+    def to_dict(self):
+        d = {}
+        for f in ["id", "name", "description", "instructor", "created_at"]:
+            d[f] = getattr(self, f)
+        return d