- Author:
- aruseni.magiku
- Posted:
- March 21, 2010
- Language:
- Python
- Version:
- 1.1
- Score:
- 2 (after 2 ratings)
This template tag attempts to get specific GET variables from request.GET. If such variables exist, it shows them as a query string (with optional "include_ampersand" mode when it puts an "&" at the end if there is a result string, or a "?" if there's none: it is used when you need to add a new variable to the query string) or as hidden input fields ("html_form" mode).
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 | # Usage:
#
# {% query_string request variables mode %}
#
# request:
# HttpRequest object
#
# variables:
# string of GET variables separed by spaces
#
# mode:
# 1. if mode is set to include_ampersand, and the result string is not empty,
# the result string gets an ampersand at the end
# 2. if mode is set to include_ampersand, but there are no variables
# in query string, a question mark goes to the result string
# 3. if mode is set to html_form, the result string turns to a set of
# html hidden input fields.
# 4. or leave mode empty for the default behavior
#
# Example:
# {% query_string request "size colour" "include_ampersand" %}
from django.utils.safestring import mark_safe
from django.utils.html import escape
from django import template
register = template.Library()
def query_string(request, variables, mode):
variable_list = variables.split(' ')
query_string_dict = {}
for variable in variable_list:
value = request.GET.get(variable, '')
if value:
query_string_dict[variable] = escape(value)
if query_string_dict:
if mode == "html_form":
query_string = ' '.join([u'<input type="hidden" name="%s" value="%s">' % (k, v) for k, v in query_string_dict.items()])
else:
query_string = '?' + '&'.join([u'%s=%s' % (k, v) for k, v in query_string_dict.items()]).replace(' ', '%20')
if mode == "include_ampersand":
query_string += '&'
else:
if mode == "include_ampersand":
query_string = '?'
else:
query_string = ''
return mark_safe(query_string)
register.simple_tag(query_string)
|
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Comments
More examples:
<a href="{% url store.views.category_view category.slug %}{% query_string request "colour size brand sort_by show" "" %}">{{ category.name }}</a>
<a href="{{ url store.views.index }}{% query_string request "size colour brand price sort_by" "include_ampersand" %}show=100"{% ifequal show '100' %} class="current"{% endifequal %}>100</a>
<form action="{% url store.views.index %}" method="get" name="price_select_form" id="price_select_form"><div style="margin-top: 10px; margin-left: 15px;">{% query_string request "colour size brand sort_by show" "html_form" %}<div id="selected_prices_list_div"></div><img src="/static/buttons/apply.png" alt="Apply" id="price_select_link"></div></form>
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