I wrote a custom tag to loop through a list of tuples and give a
seperate variable for each key and value. I want it to do the
following.
list=[('one',1),('two',2)]
for a,b in list:
return a,b #return these to context variables.
{{a}} = {{b}}
Right now the custom tag is very bare, it doesn't have any error
handling, I just want to get the basic logic to work. The problem I am
having is that the loop only returns the last item. I feel like I am
missing something small but I don't know what.
from django.core import template
register = template.Library()
# use {% loop_list a in alist as b %}
def do_loop_list(parser,token):
bits = token.contents.split()
loopkey = bits[1] #a
loopval = bits[5] #b
sequence = parser.compile_filter(bits[3])
nodelist = parser.parse(('endlooplist',))
parser.delete_first_token()
return LoopListNode(loopkey, loopval,sequence,nodelist)
do_loop_list = register.tag("loop_list", do_loop_list)
class LoopListNode(template.Node):
def __init__(self, loopkey, loopval, sequence, nodelist):
self.loopkey, self.loopval, self.sequence = loopkey,
loopval, sequence
self.nodelist = nodelist
def render(self, context):
try:
values = self.sequence.resolve(context)
except VariableDoesNotExist:
values = []
context['ur_values'] = values #debug to see what the
list looks like
for a,b in values:
context[self.loopkey] = a
context[self.loopval] = b
return self.nodelist.render(context)
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