from .field import Field

class Many2One(Field):
    def __init__(self, model, name=None, setter=None, namespace=None, default=None):
        self.model = model
        self.setter = setter
        self.namespace = namespace
        self.field_name = name
        self.default = default

    def __get__(self, inst, cls):
        if inst is None:
            return self
        assert self.name is not None
        return self._create_model(inst, name=self.field_name)
        
    def __set__(self, inst, value):
        assert self.name is not None
        inst_model = self._create_model(inst, name=self.field_name, model=self.model)

        # si hay setter manual se ejecuta
        # de lo contrario se asigna como texto del elemento
        setter = getattr(inst, self.setter or '', None)
        if callable(setter):
            setter(inst_model, value)
        else:
            inst_model._set_content(value)
            
        self._changed_field(inst, self.name, value)