modified members paid field to default to the beginning of time instead of null and disallowed nulls

members/models.py

@@ -16,7 +16,7 @@ class Member(models.Model):
     AYY = models.BooleanField(default=False)
     jas = models.BooleanField(default=False)
     created = models.DateTimeField(default=timezone.now)
-    paid = models.DateTimeField(default=None,null=True,blank=True)
+    paid = models.DateTimeField(default=datetime.fromtimestamp(0))
     
     def get_dict(self):
         return {
@@ -92,8 +92,11 @@ class MemberRequest(models.Model):
         }
 
 def date2str(date):
-    if not date:
-        return 'Ei koskaan'
+    '''
+    Convert date to a standard date string
+    '''
+    if date is None:
+        return None
     return date.strftime("%Y-%m-%d %H:%M:%S")
 
 def str2date(s):