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Diffstat (limited to 'docs/ref')
| -rw-r--r-- | docs/ref/signals.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/docs/ref/signals.txt b/docs/ref/signals.txt index a89560cc1e..19a92a875c 100644 --- a/docs/ref/signals.txt +++ b/docs/ref/signals.txt @@ -106,6 +106,12 @@ Arguments sent with this signal: ``_state.db`` is ``None`` and cannot be used to check an ``instance`` database. +.. warning:: + + For performance reasons, you shouldn't perform queries in receivers of + ``pre_init`` or ``post_init`` signals because they would be executed for + each instance returned during queryset iteration. + ``pre_save`` ------------ |