innov
/
django1
1
0
Fork 0
Code Issues Pull Requests 1 Projects Releases Wiki Activity

[1.8.x] Fixed #25893 -- Corrected custom lookups example. 

Backport of ffcdb0b471 from master
This commit is contained in:
Bruno Alla 2015-12-08 18:31:55 +00:00 committed by Tim Graham
parent f179d35f54
commit c0c2c7ecd6
1 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
docs/howto/custom-lookups.txt
View File

@ -202,10 +202,10 @@ The implementation is::
There are a couple of notable things going on. First, ``AbsoluteValueLessThan`` There are a couple of notable things going on. First, ``AbsoluteValueLessThan``
isn't calling ``process_lhs()``. Instead it skips the transformation of the isn't calling ``process_lhs()``. Instead it skips the transformation of the
``lhs`` done by ``AbsoluteValue`` and uses the original ``lhs``. That is, we ``lhs`` done by ``AbsoluteValue`` and uses the original ``lhs``. That is, we
want to get ``27`` not ``ABS(27)``. Referring directly to ``self.lhs.lhs`` is want to get ``"experiments"."change"`` not ``ABS("experiments"."change")``.
safe as ``AbsoluteValueLessThan`` can be accessed only from the Referring directly to ``self.lhs.lhs`` is safe as ``AbsoluteValueLessThan``
``AbsoluteValue`` lookup, that is the ``lhs`` is always an instance of can be accessed only from the ``AbsoluteValue`` lookup, that is the ``lhs``
``AbsoluteValue``. is always an instance of ``AbsoluteValue``.
Notice also that as both sides are used multiple times in the query the params Notice also that as both sides are used multiple times in the query the params
need to contain ``lhs_params`` and ``rhs_params`` multiple times. need to contain ``lhs_params`` and ``rhs_params`` multiple times.