X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/b2541b6c5da10e4fbcd8e4975973b539af3fec21..22f9e2afd2c1c82a804c183cbce4e6d0a00d829e:/apps/catalogue/fields.py

diff --git a/apps/catalogue/fields.py b/apps/catalogue/fields.py
index ded6f0e93..4de2e7cb6 100644
--- a/apps/catalogue/fields.py
+++ b/apps/catalogue/fields.py
@@ -3,18 +3,19 @@
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #
 import datetime
+from functools import wraps
 
 from django.conf import settings
 from django.db import models
+from django.db.models.fields.files import FieldFile
 from django.db.models import signals
 from django import forms
 from django.forms.widgets import flatatt
-from django.forms.util import smart_unicode
+from django.utils.encoding import smart_unicode
 from django.utils import simplejson as json
 from django.utils.html import escape
 from django.utils.safestring import mark_safe
 from django.utils.translation import ugettext_lazy as _
-from south.modelsinspector import add_introspection_rules
 
 
 class JSONEncoder(json.JSONEncoder):
@@ -53,7 +54,7 @@ class JSONField(models.TextField):
         defaults.update(kwargs)
         return super(JSONField, self).formfield(**defaults)
 
-    def db_type(self):
+    def db_type(self, connection):
         return 'text'
 
     def get_internal_type(self):
@@ -70,8 +71,6 @@ class JSONField(models.TextField):
             return setattr(model_instance, self.attname, dumps(json))
         setattr(cls, 'set_%s_value' % self.name, set_value)
 
-add_introspection_rules([], ["^catalogue\.fields\.JSONField"])
-
 
 class JQueryAutoCompleteWidget(forms.TextInput):
     def __init__(self, source, options=None, *args, **kwargs):
@@ -123,7 +122,24 @@ try:
     (
         [JSONField], # Class(es) these apply to
         [], # Positional arguments (not used)
-        {}, # Keyword argument           
+        {}, # Keyword argument
     ), ], ["^catalogue\.fields\.JSONField"])
 except ImportError:
     pass
+
+
+class OverwritingFieldFile(FieldFile):
+    """
+        Deletes the old file before saving the new one.
+    """
+
+    def save(self, *args, **kwargs):
+        leave = kwargs.pop('leave', None)
+        if not leave and self:
+            self.delete(save=False)
+        return super(OverwritingFieldFile, self).save(*args, **kwargs)
+
+
+class OverwritingFileField(models.FileField):
+    attr_class = OverwritingFieldFile
+