From e85afa5943695457c85e9bc1c5dc0d985004e303 Mon Sep 17 00:00:00 2001
From: Nick Pope <nick.pope@flightdataservices.com>
Date: Wed, 19 Dec 2018 23:03:42 +0000
Subject: Refs #28643 -- Changed StdDev() to use NumericOutputFieldMixin.

Keeps precision instead of forcing DecimalField to FloatField.
---
 django/db/models/aggregates.py | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'django')

diff --git a/django/db/models/aggregates.py b/django/db/models/aggregates.py
index f9202543a3..9e4a71ef68 100644
--- a/django/db/models/aggregates.py
+++ b/django/db/models/aggregates.py
@@ -141,9 +141,8 @@ class Min(Aggregate):
     name = 'Min'
 
 
-class StdDev(Aggregate):
+class StdDev(NumericOutputFieldMixin, Aggregate):
     name = 'StdDev'
-    output_field = FloatField()
 
     def __init__(self, expression, sample=False, **extra):
         self.function = 'STDDEV_SAMP' if sample else 'STDDEV_POP'
-- 
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