Fixed #256 and #334 -- Added {% ifequal %} template tag. Also, {% ifequal %} and {% ifnotequal %} now both accept an optional {% else %} clause. Unit tests included.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@574 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Adrian Holovaty 2005-08-29 21:11:41 +00:00
parent bcce1d901f
commit d80ac5ac25
2 changed files with 86 additions and 45 deletions

View File

@ -126,18 +126,21 @@ class IfChangedNode(template.Node):
else:
return ''
class IfNotEqualNode(template.Node):
def __init__(self, var1, var2, nodelist):
self.var1, self.var2, self.nodelist = var1, var2, nodelist
class IfEqualNode(template.Node):
def __init__(self, var1, var2, nodelist_true, nodelist_false, negate):
self.var1, self.var2 = var1, var2
self.nodelist_true, self.nodelist_false = nodelist_true, nodelist_false
self.negate = negate
def __repr__(self):
return "<IfNotEqualNode>"
return "<IfEqualNode>"
def render(self, context):
if template.resolve_variable(self.var1, context) != template.resolve_variable(self.var2, context):
return self.nodelist.render(context)
else:
return ''
val1 = template.resolve_variable(self.var1, context)
val2 = template.resolve_variable(self.var2, context)
if (self.negate and val1 != val2) or (not self.negate and val1 == val2):
return self.nodelist_true.render(context)
return self.nodelist_false.render(context)
class IfNode(template.Node):
def __init__(self, boolvars, nodelist_true, nodelist_false):
@ -449,22 +452,34 @@ def do_for(parser, token):
parser.delete_first_token()
return ForNode(loopvar, sequence, reversed, nodelist_loop)
def do_ifnotequal(parser, token):
def do_ifequal(parser, token, negate):
"""
Output the contents of the block if the two arguments do not equal each other.
Output the contents of the block if the two arguments equal/don't equal each other.
Example::
Examples::
{% ifequal user.id comment.user_id %}
...
{% endifequal %}
{% ifnotequal user.id comment.user_id %}
...
{% else %}
...
{% endifnotequal %}
"""
bits = token.contents.split()
if len(bits) != 3:
raise template.TemplateSyntaxError, "'ifnotequal' takes two arguments"
nodelist = parser.parse(('endifnotequal',))
parser.delete_first_token()
return IfNotEqualNode(bits[1], bits[2], nodelist)
raise template.TemplateSyntaxError, "%r takes two arguments" % bits[0]
end_tag = 'end' + bits[0]
nodelist_true = parser.parse(('else', end_tag))
token = parser.next_token()
if token.contents == 'else':
nodelist_false = parser.parse((end_tag,))
parser.delete_first_token()
else:
nodelist_false = template.NodeList()
return IfEqualNode(bits[1], bits[2], nodelist_true, nodelist_false, negate)
def do_if(parser, token):
"""
@ -736,7 +751,8 @@ template.register_tag('debug', do_debug)
template.register_tag('filter', do_filter)
template.register_tag('firstof', do_firstof)
template.register_tag('for', do_for)
template.register_tag('ifnotequal', do_ifnotequal)
template.register_tag('ifequal', lambda parser, token: do_ifequal(parser, token, False))
template.register_tag('ifnotequal', lambda parser, token: do_ifequal(parser, token, True))
template.register_tag('if', do_if)
template.register_tag('ifchanged', do_ifchanged)
template.register_tag('regroup', do_regroup)

View File

@ -92,7 +92,32 @@ TEMPLATE_TESTS = {
# Raise TemplateSyntaxError for empty block tags
'basic-syntax28': ("{% %}", {}, template.TemplateSyntaxError),
### INHERITANCE TESTS #####################################################
### IF TAG ################################################################
'if-tag01': ("{% if foo %}yes{% else %}no{% endif %}", {"foo": True}, "yes"),
'if-tag02': ("{% if foo %}yes{% else %}no{% endif %}", {"foo": False}, "no"),
'if-tag03': ("{% if foo %}yes{% else %}no{% endif %}", {}, "no"),
### COMMENT TAG ###########################################################
'comment-tag01': ("{% comment %}this is hidden{% endcomment %}hello", {}, "hello"),
'comment-tag02': ("{% comment %}this is hidden{% endcomment %}hello{% comment %}foo{% endcomment %}", {}, "hello"),
### FOR TAG ###############################################################
'for-tag01': ("{% for val in values %}{{ val }}{% endfor %}", {"values": [1, 2, 3]}, "123"),
'for-tag02': ("{% for val in values reversed %}{{ val }}{% endfor %}", {"values": [1, 2, 3]}, "321"),
### IFEQUAL TAG ###########################################################
'ifequal01': ("{% ifequal a b %}yes{% endifequal %}", {"a": 1, "b": 2}, ""),
'ifequal02': ("{% ifequal a b %}yes{% endifequal %}", {"a": 1, "b": 1}, "yes"),
'ifequal03': ("{% ifequal a b %}yes{% else %}no{% endifequal %}", {"a": 1, "b": 2}, "no"),
'ifequal04': ("{% ifequal a b %}yes{% else %}no{% endifequal %}", {"a": 1, "b": 1}, "yes"),
### IFNOTEQUAL TAG ########################################################
'ifnotequal01': ("{% ifnotequal a b %}yes{% endifnotequal %}", {"a": 1, "b": 2}, "yes"),
'ifnotequal02': ("{% ifnotequal a b %}yes{% endifnotequal %}", {"a": 1, "b": 1}, ""),
'ifnotequal03': ("{% ifnotequal a b %}yes{% else %}no{% endifnotequal %}", {"a": 1, "b": 2}, "yes"),
'ifnotequal04': ("{% ifnotequal a b %}yes{% else %}no{% endifnotequal %}", {"a": 1, "b": 1}, "no"),
### INHERITANCE ###########################################################
# Standard template with no inheritance
'inheritance01': ("1{% block first %}_{% endblock %}3{% block second %}_{% endblock %}", {}, '1_3_'),
@ -151,7 +176,7 @@ TEMPLATE_TESTS = {
# {% load %} tag (within a child template)
'inheritance19': ("{% extends 'inheritance01' %}{% block first %}{% load testtags %}{% echo 400 %}5678{% endblock %}", {}, '140056783_'),
### EXCEPTION TESTS #######################################################
### EXCEPTIONS ############################################################
# Raise exception for invalid template name
'exception01': ("{% extends 'nonexistent' %}", {}, template.TemplateSyntaxError),