Created new metadata app and move all code relating metadata to it

apps/documents/managers.py

@@ -0,0 +1,52 @@
+from django.db import models
+
+#from documents.models import DocumentGroup
+from metadata.classes import MetadataObject
+
+
+class DocumentGroupManager(models.Manager):
+    def get_groups_for(self, document, group_obj=None):
+        errors = []
+        metadata_groups = {}
+        metadata_dict = {}
+        for document_metadata in document.documentmetadata_set.all():
+            metadata_dict[document_metadata.metadata_type.name] = document_metadata.value
+        eval_dict = {}
+        eval_dict['document'] = document
+        eval_dict['metadata'] = MetadataObject(metadata_dict)
+        
+        #if group_obj:
+        #    groups_qs = DocumentGroup.objects.filter((Q(document_type=document.document_type) | Q(document_type=None)) & Q(enabled=True) & Q(pk=group_obj.pk))
+        #else:
+        #    groups_qs = DocumentGroup.objects.filter((Q(document_type=document.document_type) | Q(document_type=None)) & Q(enabled=True))
+        groups_qs=[]
+
+        for group in groups_qs:
+            total_query = Q()
+            for item in group.metadatagroupitem_set.filter(enabled=True):
+                try:
+                    value_query = Q(**{'value__%s' % item.operator: eval(item.expression, eval_dict)})
+                    if item.negated:
+                        query = (Q(metadata_type__id=item.metadata_type_id) & ~value_query)
+                    else:
+                        query = (Q(metadata_type__id=item.metadata_type_id) & value_query)
+
+                    if item.inclusion == INCLUSION_AND:
+                        total_query &= query
+                    elif item.inclusion == INCLUSION_OR:
+                        total_query |= query
+                except Exception, e:
+                    errors.append(e)
+                    value_query = Q()
+                    query = Q()
+
+            if total_query:
+                document_id_list = DocumentMetadata.objects.filter(total_query).values_list('document', flat=True)
+                metadata_groups[group] = Document.objects.filter(Q(id__in=document_id_list)).order_by('file_filename') or []
+            else:
+                metadata_groups[group] = []
+
+        if group_obj:
+            return metadata_groups[group_obj], errors
+
+        return metadata_groups, errors