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| author | Jacob Kaplan-Moss <jacob@jacobian.org> | 2009-10-24 00:28:39 +0000 |
|---|---|---|
| committer | Jacob Kaplan-Moss <jacob@jacobian.org> | 2009-10-24 00:28:39 +0000 |
| commit | b79702b2deec4ca3c625e5bffe46fa976c3c4e5f (patch) | |
| tree | 2031b1d908ca03f650669b04effee8a872632e86 /docs/ref/models | |
| parent | 9f70783b149105dfd37027504976f9526caeeae0 (diff) | |
Fixed #11402: added a `QuerySet.exists()` method. Thanks, Alex Gaynor.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@11646 bcc190cf-cafb-0310-a4f2-bffc1f526a37
Diffstat (limited to 'docs/ref/models')
| -rw-r--r-- | docs/ref/models/querysets.txt | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/docs/ref/models/querysets.txt b/docs/ref/models/querysets.txt index efd7c549b8..e685472cca 100644 --- a/docs/ref/models/querysets.txt +++ b/docs/ref/models/querysets.txt @@ -1114,6 +1114,17 @@ Aggregation <topics-db-aggregation>`. .. _field-lookups: +``exists()`` +~~~~~~~~~~~~ + +.. versionadded:: 1.2 + +Returns ``True`` if the :class:`QuerySet` contains any results, and ``False`` +if not. This tries to perform the query in the simplest and fastest way +possible, but it *does* execute nearly the same query. This means that calling +:meth:`QuerySet.exists()` is faster that ``bool(some_query_set)``, but not by +a large degree. + Field lookups ------------- |