Fixed #1443 -- Django's various bits now support dates before 1900. Thanks to SmileyChris, Chris Green, Fredrik Lundh and others for patches and design help

git-svn-id: http://code.djangoproject.com/svn/django/trunk@7946 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/core/serializers/base.py

@@ -8,6 +8,7 @@ except ImportError:
     from StringIO import StringIO
 from django.db import models
 from django.utils.encoding import smart_str, smart_unicode
+from django.utils import datetime_safe
 
 class SerializationError(Exception):
     """Something bad happened during serialization."""
@@ -59,7 +60,8 @@ class Serializer(object):
         Convert a field's value to a string.
         """
         if isinstance(field, models.DateTimeField):
-            value = getattr(obj, field.name).strftime("%Y-%m-%d %H:%M:%S")
+            d = datetime_safe.new_datetime(getattr(obj, field.name))
+            value = d.strftime("%Y-%m-%d %H:%M:%S")
         else:
             value = field.flatten_data(follow=None, obj=obj).get(field.name, "")
         return smart_unicode(value)

django/core/serializers/json.py

@@ -6,6 +6,7 @@ import datetime
 from django.utils import simplejson
 from django.core.serializers.python import Serializer as PythonSerializer
 from django.core.serializers.python import Deserializer as PythonDeserializer
+from django.utils import datetime_safe
 try:
     from cStringIO import StringIO
 except ImportError:
@@ -20,7 +21,7 @@ class Serializer(PythonSerializer):
     Convert a queryset to JSON.
     """
     internal_use_only = False
-    
+
     def end_serialization(self):
         self.options.pop('stream', None)
         self.options.pop('fields', None)
@@ -51,9 +52,11 @@ class DjangoJSONEncoder(simplejson.JSONEncoder):
 
     def default(self, o):
         if isinstance(o, datetime.datetime):
-            return o.strftime("%s %s" % (self.DATE_FORMAT, self.TIME_FORMAT))
+            d = datetime_safe.new_datetime(o)
+            return d.strftime("%s %s" % (self.DATE_FORMAT, self.TIME_FORMAT))
         elif isinstance(o, datetime.date):
-            return o.strftime(self.DATE_FORMAT)
+            d = datetime_safe.new_date(o)
+            return d.strftime(self.DATE_FORMAT)
         elif isinstance(o, datetime.time):
             return o.strftime(self.TIME_FORMAT)
         elif isinstance(o, decimal.Decimal):

django/core/validators.py

@@ -141,10 +141,6 @@ def _isValidDate(date_string):
     # Could use time.strptime here and catch errors, but datetime.date below
     # produces much friendlier error messages.
     year, month, day = map(int, date_string.split('-'))
-    # This check is needed because strftime is used when saving the date
-    # value to the database, and strftime requires that the year be >=1900.
-    if year < 1900:
-        raise ValidationError, _('Year must be 1900 or later.')
     try:
         date(year, month, day)
     except ValueError, e:
@@ -407,12 +403,12 @@ class IsAPowerOf(object):
     """
     Usage: If you create an instance of the IsPowerOf validator:
         v = IsAPowerOf(2)
-    
+
     The following calls will succeed:
-        v(4, None) 
+        v(4, None)
         v(8, None)
         v(16, None)
-    
+
     But this call:
         v(17, None)
     will raise "django.core.validators.ValidationError: ['This value must be a power of 2.']"