Jinja 2 will sometimes hide exceptions thrown in properties behind "Class has no attribute property_name" due to the way the jinja2.Undefined works. This is a way to forcibly throw the underlying exceptions.

jinja_property_error.py

class JinjaPropertyErrorReporting():
    def __getattribute__(self, name):
        if isinstance(getattr(type(self), name, None), property): # TODO: could be done using hasattr?
            try:
                return super().__getattribute__(name)
            except Exception as e:
                raise Exception(f"Jinja would have accidentally hidden this error: {type(e).__name__}: {str(e)}") from e
        else:
            return super().__getattribute__(name)

#########################
# EXAMPLE CODE

from jinja2 import Environment
from jinja2.runtime import StrictUndefined

# Class without mixin to show bad jinja2 behaviour
class MyClass():
    @property
    def faulty_property(self):
        return self.doesntexist

# Class with mixin to show the workaround works. 
class MyClassWithMixin(JinjaPropertyErrorReporting): 
    @property
    def faulty_property(self):
        return self.doesntexist

# otherwise it will ignore any errors, the Mixin still works with the base Undefined.
env = Environment(undefined=StrictUndefined) 

t = env.from_string("{{ obj.faulty_property }}")

# instances
without = MyClass()
with_ = MyClassWithMixin()

# printing just the error message 
try:
    print(t.render(obj=without))
except Exception as e:
    print(e)

try:
    print(t.render(obj=with_))
except Exception as e:
    print(e)