Update Document model's uuid field to use Django's native UUIDField class.

mayan/apps/documents/migrations/0028_newversionblock.py

@@ -14,8 +14,17 @@ class Migration(migrations.Migration):
         migrations.CreateModel(
             name='NewVersionBlock',
             fields=[
-                ('id', models.AutoField(verbose_name='ID', serialize=False, auto_created=True, primary_key=True)),
-                ('document', models.ForeignKey(verbose_name='Document', to='documents.Document')),
+                (
+                    'id', models.AutoField(
+                        verbose_name='ID', serialize=False, auto_created=True,
+                        primary_key=True
+                    )
+                ),
+                (
+                    'document', models.ForeignKey(
+                        verbose_name='Document', to='documents.Document'
+                    )
+                ),
             ],
             options={
                 'verbose_name': 'New version block',

mayan/apps/documents/migrations/0030_auto_20160309_1837.py

@@ -14,11 +14,21 @@ class Migration(migrations.Migration):
         migrations.AlterField(
             model_name='documenttype',
             name='delete_time_period',
-            field=models.PositiveIntegerField(default=30, help_text='Amount of time after which documents of this type in the trash will be deleted.', null=True, verbose_name='Delete time period', blank=True),
+            field=models.PositiveIntegerField(
+                default=30, help_text='Amount of time after which documents '
+                'of this type in the trash will be deleted.', null=True,
+                verbose_name='Delete time period', blank=True
+            ),
         ),
         migrations.AlterField(
             model_name='documenttype',
             name='delete_time_unit',
-            field=models.CharField(default='days', choices=[('days', 'Days'), ('hours', 'Hours'), ('minutes', 'Minutes')], max_length=8, blank=True, null=True, verbose_name='Delete time unit'),
+            field=models.CharField(
+                default='days', choices=[
+                    ('days', 'Days'), ('hours', 'Hours'),
+                    ('minutes', 'Minutes')
+                ], max_length=8, blank=True, null=True,
+                verbose_name='Delete time unit'
+            ),
         ),
     ]

mayan/apps/documents/migrations/0031_convert_uuid.py

@@ -0,0 +1,25 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+import uuid
+
+from django.db import migrations, models
+
+
+def convert_uuid_to_hex(apps, schema_editor):
+    Document = apps.get_model('documents', 'Document')
+
+    for document in Document.objects.all():
+        document.uuid = uuid.UUID(document.uuid).hex
+        document.save()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('documents', '0030_auto_20160309_1837'),
+    ]
+
+    operations = [
+        migrations.RunPython(convert_uuid_to_hex),
+    ]

mayan/apps/documents/migrations/0032_auto_20160315_0537.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import uuid
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('documents', '0031_convert_uuid'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='document',
+            name='uuid',
+            field=models.UUIDField(default=uuid.uuid4, editable=False),
+        ),
+    ]

mayan/apps/documents/models.py

@@ -149,9 +149,7 @@ class Document(models.Model):
     Defines a single document with it's fields and properties
     """
 
-    uuid = models.CharField(
-        default=UUID_FUNCTION, editable=False, max_length=48
-    )
+    uuid = models.UUIDField(default=uuid.uuid4, editable=False)
     document_type = models.ForeignKey(
         DocumentType, related_name='documents',
         verbose_name=_('Document type')