def render(self, context):
kwargs = {key: value.resolve(context) for key, value in self.kwargs.items()}
try:
if 'template_name_var' in kwargs:
extending_template = get_template(kwargs.get('template_name_var'))
else:
extending_template = get_template(self.template_name.resolve())
except:
return ''
if self.only:
flattened_context = kwargs
else:
flattened_context = context.flatten()
flattened_context.update(kwargs)
nodelist_changed = False
new_nodelist = self.get_node_list(extending_template.template.nodelist)
if 'block' in kwargs:
block_nodes = self.get_all_blocks(new_nodelist)
new_nodelist = NodeList(
[node for node in block_nodes if node.name == kwargs.get('block')]
)
new_nodelist.contains_nontext = True
nodelist_changed = True
if self.multiline:
blocks = {node.name: node for node in self.nodelist if isinstance(node, BlockNode)}
self.rearrange_blocks(new_nodelist, blocks)
nodelist_changed = True
# This is because there can also be cache loader for template. And if in template loaded with such loader nodes
# are changed, they are changed in next iteration also.
# So now I load template from empty string and give him changed nodelist. So I don't change original template
if nodelist_changed:
extending_template = template_from_string('', None)
extending_template.template.nodelist = new_nodelist
content = extending_template.render(flattened_context)
content = mark_safe(content)
return content
def get_node_list(nodelist):
while len(nodelist) == 1 and isinstance(nodelist[0], ExtendsNode):
nodelist = nodelist[0].nodelist
ret = NodeList(nodelist)
ret.contains_nontext = nodelist.contains_nontext
return ret
