Exibindo um thumbnail da foto que o servidor colocar no cadastro.

sigi/apps/servidores/admin.py

@@ -2,6 +2,8 @@
 from django.contrib import admin
 from django.contrib.auth.forms import UserCreationForm
 from django.contrib.contenttypes import generic
+
+from sigi.apps.utils.admin_widgets import AdminImageWidget
 from sigi.apps.servidores.models import Servidor, Funcao, Licenca, Ferias
 from sigi.apps.contatos.models import Endereco, Telefone
 
@@ -77,6 +79,13 @@ class ServidorAdmin(admin.ModelAdmin):
       #}),
     )
 
+    def formfield_for_dbfield(self, db_field, **kwargs):
+        if db_field.name == 'foto':
+            request = kwargs.pop("request", None)
+            kwargs['widget'] = AdminImageWidget
+            return db_field.formfield(**kwargs)
+        return super(ServidorAdmin,self).formfield_for_dbfield(db_field, **kwargs)
+
 admin.site.register(Servidor, ServidorAdmin)
 admin.site.register(Funcao, FuncaoAdmin)
 admin.site.register(Ferias, FeriasAdmin)

sigi/apps/utils/admin_widgets.py

@@ -0,0 +1,15 @@
+from django.contrib.admin.widgets import AdminFileWidget
+from django.utils.translation import ugettext as _
+from django.utils.safestring import mark_safe
+
+class AdminImageWidget(AdminFileWidget):
+    def render(self, name, value, attrs=None):
+        output = []
+        if value and getattr(value, "url", None):
+            image_url = value.url
+            file_name=str(value)
+            output.append(
+                u' <a href="%s" target="_blank"><img src="%s" width="200" alt="%s"/></a> <br/> %s' % \
+                (image_url, image_url, file_name, _('Change:')))
+        output.append(super(AdminFileWidget, self).render(name, value, attrs))
+        return mark_safe(u''.join(output))