Fixed #27582 -- Allowed HStoreField to store null values.

3 files changed, 17 insertions, 4 deletions

diff --git a/docs/ref/contrib/postgres/fields.txt b/docs/ref/contrib/postgres/fields.txt
index 7c756655ce..f753f3b75e 100644
--- a/docs/ref/contrib/postgres/fields.txt
+++ b/docs/ref/contrib/postgres/fields.txt
@@ -275,8 +275,9 @@ A more useful index is a ``GIN`` index, which you should create using a
 
 .. class:: HStoreField(**options)
 
-    A field for storing mappings of strings to strings. The Python data type
-    used is a ``dict``.
+    A field for storing key-value pairs. The Python data type used is a
+    ``dict``. Keys must be strings, and values may be either strings or nulls
+    (``None`` in Python).
 
     To use this field, you'll need to:
 
@@ -287,6 +288,10 @@ A more useful index is a ``GIN`` index, which you should create using a
     You'll see an error like ``can't adapt type 'dict'`` if you skip the first
     step, or ``type "hstore" does not exist`` if you skip the second.
 
+    .. versionchanged:: 1.11
+
+        Added the ability to store nulls. Previously, they were cast to strings.
+
 .. note::
 
     On occasions it may be useful to require or restrict the keys which are
diff --git a/docs/ref/contrib/postgres/forms.txt b/docs/ref/contrib/postgres/forms.txt
index c4af819a72..bfc7aa3e7a 100644
--- a/docs/ref/contrib/postgres/forms.txt
+++ b/docs/ref/contrib/postgres/forms.txt
@@ -144,8 +144,8 @@ Fields
 .. class:: HStoreField
 
     A field which accepts JSON encoded data for an
-    :class:`~django.contrib.postgres.fields.HStoreField`. It will cast all the
-    values to strings. It is represented by an HTML ``<textarea>``.
+    :class:`~django.contrib.postgres.fields.HStoreField`. It casts all values
+    (except nulls) to strings. It is represented by an HTML ``<textarea>``.
 
     .. admonition:: User friendly forms
 
@@ -159,6 +159,10 @@ Fields
         valid for a given field. This can be done using the
         :class:`~django.contrib.postgres.validators.KeysValidator`.
 
+    .. versionchanged:: 1.11
+
+        Added the ability to store nulls.
+
 ``JSONField``
 -------------
 
diff --git a/docs/releases/1.11.txt b/docs/releases/1.11.txt
index e14d76ca1f..a46edbdfb9 100644
--- a/docs/releases/1.11.txt
+++ b/docs/releases/1.11.txt
@@ -194,6 +194,10 @@ Minor features
 * The new :class:`~django.contrib.postgres.aggregates.JSONBAgg` allows
   aggregating values as a JSON array.
 
+* :class:`~django.contrib.postgres.fields.HStoreField` and
+  :class:`~django.contrib.postgres.forms.HStoreField` allow storing null
+  values.
+
 :mod:`django.contrib.redirects`
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~