Got upload view working, staging preview and delete working ok

apps/sources/forms.py

@@ -0,0 +1,39 @@
+from django import forms
+from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import ugettext
+from django.core.urlresolvers import reverse
+from django.utils.safestring import mark_safe
+from django.conf import settings
+
+from common.forms import DetailForm
+from common.literals import PAGE_SIZE_CHOICES, PAGE_ORIENTATION_CHOICES
+from common.conf.settings import DEFAULT_PAPER_SIZE
+from common.conf.settings import DEFAULT_PAGE_ORIENTATION
+
+from documents.forms import DocumentForm
+
+
+class StagingDocumentForm(DocumentForm):
+    """
+    Form that show all the files in the staging folder specified by the
+    StagingFile class passed as 'cls' argument
+    """
+    def __init__(self, *args, **kwargs):
+        cls = kwargs.pop('cls')
+        super(StagingDocumentForm, self).__init__(*args, **kwargs)
+        try:
+            self.fields['staging_file_id'].choices = [
+                (staging_file.id, staging_file) for staging_file in cls.get_all()
+            ]
+        except:
+            pass
+
+        # Put staging_list field first in the field order list
+        staging_list_index = self.fields.keyOrder.index('staging_file_id')
+        staging_list = self.fields.keyOrder.pop(staging_list_index)
+        self.fields.keyOrder.insert(0, staging_list)
+
+    staging_file_id = forms.ChoiceField(label=_(u'Staging file'))
+
+    class Meta(DocumentForm.Meta):
+        exclude = ('description', 'file', 'document_type', 'tags')