From 5bdf1da730368a16beaa077d91457ff625f06bc4 Mon Sep 17 00:00:00 2001 From: Adrian Holovaty Date: Fri, 2 Sep 2005 19:39:47 +0000 Subject: Fixed #394 -- Trailing-slash redirects now retain duplicate name-value query-string pairs, instead of the first of each pair. Added a QueryDict.urlencode() method to accomplish this. Updated the docs. Thanks for the good catch, mlambert git-svn-id: http://code.djangoproject.com/svn/django/trunk@613 bcc190cf-cafb-0310-a4f2-bffc1f526a37 --- docs/request_response.txt | 30 +++++++++++++++++++++--------- 1 file changed, 21 insertions(+), 9 deletions(-) (limited to 'docs') diff --git a/docs/request_response.txt b/docs/request_response.txt index 3f4ccea713..a004b99126 100644 --- a/docs/request_response.txt +++ b/docs/request_response.txt @@ -115,16 +115,20 @@ Methods Example: ``"/music/bands/the_beatles/?print=true"`` -MultiValueDict objects ----------------------- +QueryDict objects +----------------- In an ``HttpRequest`` object, the ``GET`` and ``POST`` attributes are instances -of ``django.utils.datastructures.MultiValueDict``. ``MultiValueDict`` is a -dictionary-like class customized to deal with multiple values for the same key. -This is necessary because some HTML form elements, notably -````, pass +multiple values for the same key. -``MultiValueDict`` implements the following standard dictionary methods: +``QueryDict`` instances are immutable, unless you create a ``copy()`` of them. +That means you can't change attributes of ``request.POST`` and ``request.GET`` +directly. + +``QueryDict`` implements the following standard dictionary methods: * ``__repr__()`` @@ -141,7 +145,11 @@ This is necessary because some HTML form elements, notably * ``has_key(key)`` - * ``items()`` + * ``items()`` -- Just like the standard dictionary ``items()`` method, + except this retains the order for values of duplicate keys, if any. For + example, if the original query string was ``"a=1&b=2&b=3"``, ``items()`` + will return ``[("a", ["1"]), ("b", ["2", "3"])]``, where the order of + ``["2", "3"]`` is guaranteed, but the order of ``a`` vs. ``b`` isn't. * ``keys()`` @@ -150,7 +158,8 @@ This is necessary because some HTML form elements, notably In addition, it has the following methods: * ``copy()`` -- Returns a copy of the object, using ``copy.deepcopy()`` - from the Python standard library. + from the Python standard library. The copy will be mutable -- that is, + you can change its values. * ``getlist(key)`` -- Returns the data with the requested key, as a Python list. Returns an empty list if the key doesn't exist. @@ -161,6 +170,9 @@ In addition, it has the following methods: * ``appendlist(key, item)`` -- Appends an item to the internal list associated with key. + * ``urlencode()`` -- Returns a string of the data in query-string format. + Example: ``"a=2&b=3&b=5"``. + Examples -------- -- cgit v1.3