def _self_referential_fk(klass_model):
    """
    Return whether this model has a self ref FK, and the name for the field
    """
    for f in klass_model._meta.concrete_fields:
        if f.related_model:
            if issubclass(klass_model, f.related_model):
                return f.attname
    return None
def _self_referential_fk(klass_model):
    """
    Return whether this model has a self ref FK, and the name for the field
    """
    for f in klass_model._meta.concrete_fields:
        if f.related_model:
            if issubclass(klass_model, f.related_model):
                return f.attname
    return None
def _self_referential_fk ( klass_model ) : for f in klass_model . _meta . concrete_fields : if f . related_model : if issubclass ( klass_model , f . related_model ) : return f . attname return None
Return whether this model has a self ref FK, and the name for the field
Return whether this model has a self ref FK and the name for the field