dynamicField in django-haystack SOLR config - solr

Question

How to configure search_indexes.py to index dynamicFields in django-haystack. I'm using SOLR as the search engine for haystack.

Answer 1

If you are using Haystack's build_solr_schema management command to create your schema.xml, notice that it automatically includes various dynamicFields for popular field types. For example, check out the schema template for Haystack v2.1. (This looks like it's been there since Haystack v1.)
This allows you to create dynamically-named fields in your search index's prepare method. For example, if you were indexing notes that could have an id string for your ever-changing group of partners, you could do this:
def prepare(self, obj):
self.prepared_data = super(NoteIndex, self).prepare(obj)
for (partner_name, partner_id) in get_partners():
self.prepared_data['%s_s' % partner_name] = partner_id
return self.prepared_data
The key thing here is that the field name ends with "_s", which according to the schema is a dynamic name for string types.
Unfortunately, these dynamic partner fields are not explicitly defined at the top of your SearchIndex class. You may want to mention this in a comment.

Answer 2

As far as I can see in the source code of django-haystack 1.2.* you can't do this. You can write own schema instead of generating it using management commands and use it.

Answer 3

As #nofinator say, you can do this in .prepare method of SearchIndex class by concatinating field name with prefix from SOLR Schema.xml.
By default Haystack(current ver. is 2.1.1) ships with some default DynamicField like a *_s. But if you want, you can make your own DynamicField.
In my project ill make attr_* field and its work fine.
All you need to do, is add this field, with same syntax in Schema.xml
You can do in manualy or overriding standart Haystack build_solr_schema management command.(Btw, its uses standart django render template fnc. so its pretty easy.