fix valuerror of wrapper in get_save_path

django_mailbox/migrations/0005_auto_20160523_2240.py

@@ -1,9 +1,9 @@
 from django.db import migrations, models
+from functools import partial
 import django_mailbox.utils
 
 
 class Migration(migrations.Migration):
-
     dependencies = [
         ('django_mailbox', '0004_bytestring_to_unicode'),
     ]
@@ -12,6 +12,8 @@ class Migration(migrations.Migration):
         migrations.AlterField(
             model_name='messageattachment',
             name='document',
-            field=models.FileField(upload_to=django_mailbox.utils.get_save_path(setting='attachment_upload_to'), verbose_name='Document'),
+            field=models.FileField(
+                upload_to=partial(django_mailbox.utils.get_save_path, setting='attachment_upload_to'),
+                verbose_name='Document'),
         ),
     ]

django_mailbox/migrations/0009_auto_20200208_0953.py

@@ -0,0 +1,20 @@
+# Generated by Django 2.2.4 on 2020-02-08 09:53
+
+from django.db import migrations, models
+import django_mailbox.utils
+import functools
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('django_mailbox', '0008_auto_20190219_1553'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='message',
+            name='eml',
+            field=models.FileField(help_text='Original full content of message', null=True, upload_to=functools.partial(django_mailbox.utils.get_save_path, *(), **{'setting': 'message_upload_to'}), verbose_name='Raw message contents'),
+        ),
+    ]

django_mailbox/models.py

@@ -10,6 +10,7 @@ from email.utils import formatdate, parseaddr
 from urllib.parse import parse_qs, unquote, urlparse
 from quopri import encode as encode_quopri
 from io import BytesIO
+from functools import partial
 import base64
 import email
 import logging
@@ -512,7 +513,7 @@ class Message(models.Model):
     eml = models.FileField(
         _('Raw message contents'),
         null=True,
-        upload_to=utils.get_save_path(setting='message_upload_to'),
+        upload_to=partial(utils.get_save_path, setting='message_upload_to'),
         help_text=_('Original full content of message')
     )
     objects = models.Manager()
@@ -752,7 +753,7 @@ class MessageAttachment(models.Model):
 
     document = models.FileField(
         _('Document'),
-        upload_to=utils.get_save_path(setting='attachment_upload_to'),
+        upload_to=partial(utils.get_save_path, setting='attachment_upload_to'),
     )
 
     def delete(self, *args, **kwargs):

django_mailbox/utils.py

@@ -3,6 +3,7 @@ import email.header
 import logging
 import os
 
+from django.utils.deconstruct import deconstructible
 from django.conf import settings
 
 logger = logging.getLogger(__name__)
@@ -143,8 +144,7 @@ def get_body_from_message(message, maintype, subtype):
     return body
 
 
-def get_save_path(setting):
+def get_save_path(instance, filename, setting):
-    def _tmp(instance, filename):
     settings = get_settings()
 
     path = settings[setting]
@@ -155,4 +155,3 @@ def get_save_path(setting):
         path,
         filename,
     )
-    return _tmp