Allow post-processing fields with templates

CHANGELOG.rst

@@ -15,6 +15,7 @@ Added
 * ZIP files with multiple CSVs and accompanying photos can now be imported
 * Field types can now provide values for arbitrary alternative DB fields
 * Virtual fields can be generated from literal fields using Django templates
+* Field data can be post-processed using Django templates
 * Fields for Group.parent_groups and Person.member_of
 
 Fixed

aleksis/apps/csv_import/util/process.py

@@ -130,17 +130,19 @@ def import_csv(
 
                 iterator = recorder.iterate(data_as_dict) if recorder else tqdm(data_as_dict)
                 for row in iterator:
-                    # Generate virtual field data
-                    for column_name in virtual_fields:
-                        field_type = field_types[column_name]
-
+                    # Generate virtual and post-processed field data
+                    for column_name, field_type in field_types:
                         # Generate field using a Django template string, and the row as context
-                        tmpl = Template(field_type.get_template())
+                        tmpl_str = field_type.get_template()
+                        if not tmpl_str:
+                            continue
+                        tmpl = Template(tmpl_str)
                         ctx = Context(row)
                         data = tmpl.render(ctx).strip()
 
-                        # Post-process field using converter
-                        data = field_type.get_converter()(data)
+                        if column_name in virtual_fields:
+                            # Post-process virtual fields using converter
+                            data = field_type.get_converter()(data)
 
                         # Store
                         row[column_name] = data