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authorBaptiste Mispelon <bmispelon@gmail.com>2016-08-26 11:39:06 +0200
committerTim Graham <timograham@gmail.com>2016-08-26 16:59:21 -0400
commit61b45dff6be3a2c85adac73acf5fe0de71f9ecda (patch)
tree861f107b2ff26cee60e1970c320d6d929bc25767 /docs/ref/templates
parent7968bb7fada503b79d8b0e8c92aa076d60c17241 (diff)
Fixed #27126 -- Made {% regroup %} return a namedtuple to ease unpacking.
Diffstat (limited to 'docs/ref/templates')
-rw-r--r--docs/ref/templates/builtins.txt25
1 files changed, 24 insertions, 1 deletions
diff --git a/docs/ref/templates/builtins.txt b/docs/ref/templates/builtins.txt
index 1a8fe600ac..9a5bd4abba 100644
--- a/docs/ref/templates/builtins.txt
+++ b/docs/ref/templates/builtins.txt
@@ -896,13 +896,36 @@ resulting list. Here, we're regrouping the ``cities`` list by the ``country``
attribute and calling the result ``country_list``.
``{% regroup %}`` produces a list (in this case, ``country_list``) of
-**group objects**. Each group object has two attributes:
+**group objects**. Group objects are instances of
+:py:func:`~collections.namedtuple` with two fields:
* ``grouper`` -- the item that was grouped by (e.g., the string "India" or
"Japan").
* ``list`` -- a list of all items in this group (e.g., a list of all cities
with country='India').
+.. versionchanged:: 1.11
+
+ The group object was changed from a dictionary to a
+ :py:func:`~collections.namedtuple`.
+
+Because ``{% regroup %}`` produces :py:func:`~collections.namedtuple` objects,
+you can also write the previous example as::
+
+ {% regroup cities by country as country_list %}
+
+ <ul>
+ {% for country, local_cities in country_list %}
+ <li>{{ country }}
+ <ul>
+ {% for city in local_cities %}
+ <li>{{ city.name }}: {{ city.population }}</li>
+ {% endfor %}
+ </ul>
+ </li>
+ {% endfor %}
+ </ul>
+
Note that ``{% regroup %}`` does not order its input! Our example relies on
the fact that the ``cities`` list was ordered by ``country`` in the first place.
If the ``cities`` list did *not* order its members by ``country``, the