List field

mongoforms/fields.py

@@ -2,8 +2,29 @@
 from django.utils.encoding import smart_unicode
 from bson.errors import InvalidId
 from bson.objectid import ObjectId
+from mongoengine import StringField
 
 
+
+
+class ListField(forms.Field):
+    """
+    List field for mongo forms.
+    Uses MultiValueField from django.forms module. 
+    """
+    field_name_separator = '__'
+
+    def __init__(self, field, field_name_base, list_size=2, *args, **kwargs):
+        forms.Field.__init__(self, *args, **kwargs)
+        self.fields = []
+
+        field_generator = MongoFormFieldGenerator()
+
+        for field_num in range(list_size):
+            field_name = '%s%s%s' % (field_name_base, 
+                                    self.field_name_separator, field_num)
+            self.fields.append(field_generator.generate(field_name, field))
+
 class ReferenceField(forms.ChoiceField):
     """
     Reference field for mongo forms. Inspired by `django.forms.models.ModelChoiceField`.
@@ -154,3 +175,13 @@ def generate_referencefield(self, field_name, field, label):
         return ReferenceField(
             field.document_type.objects,
             label=label)
+
+    #  Custom
+    def generate_listfield(self, field_name, field, label):
+        return ListField(
+            label=label,
+            field=field.field,
+            field_name_base=field_name,
+            required=field.required,
+            initial=field.default)
+

mongoforms/forms.py

@@ -78,12 +78,21 @@ def __init__(self, data=None, files=None, auto_id='id_%s', prefix=None,
             # walk through the document fields
             for field_name, field in iter_valid_fields(self._meta):
                 # add field data if needed
+                if not hasattr(instance, field_name):
+                    continue
                 field_data = getattr(instance, field_name)
-                if isinstance(self._meta.document._fields[field_name], ReferenceField):
-                    # field data could be None for not populated refs
-                    field_data = field_data and str(field_data.id)
+                if not self._meta.document._dynamic:
+                    fields = self._meta.document._fields
+                # add dfields if document is dynamic
+                elif hasattr(self._meta.document, '_dfields'):
+                    fields = self._meta.document._dfields
+                else:
+                    continue
+                if field_name in fields:
+                    _field = fields[field_name]
+                    if isinstance(_field, ReferenceField):
+                        field_data = field_data and str(field_data.id)
                 object_data[field_name] = field_data
-
         # additional initial data available?
         if initial is not None:
             object_data.update(initial)

mongoforms/utils.py

@@ -39,3 +39,8 @@ def iter_valid_fields(meta):
             # skip excluded fields
             if field_name not in meta_exclude:
                 yield (field_name, field)
+
+    # walk through meta dfields
+    if meta.document._dynamic and hasattr(meta.document, '_dfields'):
+        for field_name, field in meta.document._dfields.iteritems():
+            yield (field_name, field)