add limp de variações de arq em camp baseados em FileField

sapl/parlamentares/migrations/0021_clear_thumbnails_cache.py

@@ -0,0 +1,23 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+
+from django.db import migrations
+from sapl.utils import clear_thumbnails_cache
+
+
+def clear_thumbnails_cache_migrate(apps, schema_editor):
+    Parlamentar = apps.get_model("parlamentares", "Parlamentar")
+    parlamentares = Parlamentar.objects.all()
+    clear_thumbnails_cache(parlamentares, 'fotografia')
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('parlamentares', '0020_fix_inicio_mandato'),
+    ]
+
+    operations = [
+        migrations.RunPython(clear_thumbnails_cache_migrate),
+    ]

sapl/utils.py

@@ -22,6 +22,7 @@ from django_filters.filterset import STRICTNESS
 from easy_thumbnails import source_generators
 from floppyforms import ClearableFileInput
 from reversion.admin import VersionAdmin
+from unipath.path import Path
 import django_filters
 import magic
 
@@ -36,6 +37,23 @@ def pil_image(source, exif_orientation=False, **options):
     return source_generators.pil_image(source, exif_orientation, **options)
 
 
+def clear_thumbnails_cache(queryset, field):
+
+    for r in queryset:
+        assert hasattr(r, field), _(
+            'Objeto da listagem não possui o campo informado')
+
+        if not getattr(r, field):
+            continue
+
+        path = Path(getattr(r, field).path)
+        cache_files = path.parent.walk()
+
+        for cf in cache_files:
+            if cf != path:
+                cf.remove()
+
+
 def normalize(txt):
     return unicodedata_normalize(
         'NFKD', txt).encode('ASCII', 'ignore').decode('ASCII')