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Updated stale docstring of setup_joins

This commit is contained in:
Anssi Kääriäinen 2012-11-24 16:19:55 +02:00
parent dc569c8801
commit 08b4a22293
1 changed files with 11 additions and 5 deletions
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16
django/db/models/sql/query.py
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@ -1274,11 +1274,17 @@ class Query(object):
Compute the necessary table joins for the passage through the fields
given in 'names'. 'opts' is the Options class for the current model
(which gives the table we are joining to), 'alias' is the alias for the
table we are joining to. If dupe_multis is True, any many-to-many or
many-to-one joins will always create a new alias (necessary for
disjunctive filters). If can_reuse is not None, it's a list of aliases
that can be reused in these joins (nothing else can be reused in this
case). Finally, 'negate' is used in the same sense as for add_filter()
table we are joining to.
The 'can_reuse' defines the reverse foreign key joins we can reuse. It
can be either sql.constants.REUSE_ALL in which case all joins are
reusable or a set of aliases that can be reused. Non-reverse foreign
keys are always reusable.
The 'allow_explicit_fk' controls if field.attname is allowed in the
lookups.
Finally, 'negate' is used in the same sense as for add_filter()
-- it indicates an exclude() filter, or something similar. It is only
passed in here so that it can be passed to a field's extra_filter() for
customized behavior.