Hi all,
I've been trying to figure this out for hours and hours, but I simply
can't understand how to make it work.
Now, we have a very simple custom template tag. Let's say that we want
the template tag to take as a parameter a filtered variable. A very
simple implementation of my template tag is :
register = template.Library()
class Test(template.Node):
def __init__(self,val):
self.val = val
def render(self,context):
print("VALUE=%s" % self.val)
if self.val.__class__.__name__ == "FilterExpression":
self.val = self.val.resolve(context)
return self.val
@register.tag('test')
def test(parser,token):
print("Test is executed")
val = token.split_contents()1
val = parser.compile_filter(val)
return Test(val)
This just gets the value and resolves the filter. A simple template to
test this is :
{% for p in test_list %}
{% test p|first %} - {%test p|last%} --- {{p}}<br/>
{% endfor %}
The test_list is :
(("First1","Last1"),("First2","Last2"),("First3","Last3"))
So from the code I've written so far I would expect this silly
template tag to iterate through and print out the first and last
element of the tuples.
Though, this is the output of the template :
First1 - Last1 --- ('First1', 'Last1')
First1 - Last1 --- ('First2', 'Last2')
First1 - Last1 --- ('First3', 'Last3')
And this is what I get in my console:
Test is executed
Test is executed
VALUE=p|first
VALUE=p|last
VALUE=First1
VALUE=Last1
VALUE=First1
VALUE=Last1
OK, so what I understand so far is that the template player calls the
test template tag the first two times. Then, somehow it creates new
Test objects and feeds them with the result of the first execution.
I am certainly not a django expert, so could someone be kind enough to
explain me what on earth is this thing doing and how to get around it
please ? :)
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