|== Changed Where Node Internals ==
|For anybody writing custom Q-like objects or advanced filter additions with the !QuerySet class,  changed the information that is passed to the Where class by default. A standard leaf node in the Where class used to be
|[table_alias, field_name, field_instance, lookup_type, value]
|This changeset removed the need to store any field instances (in `field_instance`) or model references (in the `value`). The new list in the leaf nodes is now
|[table_alias, field_name, db_type, lookup_type, value_annotation, params]
|The `db_type` is the result of `field.db_type()` or `None` if `field` was None previously. The `value_annotation` is usually `bool(value)`, but it is `datetime.datetime` if the previous `value` was a datetime. Finally, `params` is the result of `value.db_prep_lookup()` or equivalent and must be a sequence (so if you're passing in a value directly, wrap it in a list or a tuple).
|Again, this will not affect most code, but people writing customised things will need to adjust. Fortunately, since the list is now one component longer, if you miss a change, your code will fail drastically so you will notice.