def resolve_params(obj, params, default=missing):
"""Given a dictionary of keyword arguments, return the same dictionary except with
values enclosed in `< >` resolved to attributes on `obj`.
"""
param_values = {}
for name, attr_tpl in params.items():
attr_name = tpl(str(attr_tpl))
if attr_name:
if attr_name == "slug":
lang = get_language()
attribute_value = get_value(obj, f"{attr_name}.{lang}")
if not attribute_value:
attribute_value = get_value(obj,
attr_name,
default=default)
else:
attribute_value = get_value(obj, attr_name, default=default)
if attribute_value is not missing:
param_values[name] = attribute_value
else:
raise AttributeError(
'{attr_name!r} is not a valid '
'attribute of {obj!r}'.format(attr_name=attr_name,
obj=obj), )
else:
param_values[name] = attr_tpl
return param_values
def test_tpl(tag, val):
assert utils.tpl(tag) == val