如何使用 get_FOO_display 访问人类可读的名称

Question

您好，我有下一个代码向我的参与者显示在前 session 中给我的响应文本。

    J11 = models.IntegerField(
        choices=[
            [-2, 'Muy moralmente inapropiado'],
            [-1, 'Moralmente inapropiado'],
            [0, 'No aplica'],
            [1, 'Moralmente apropiado'],
            [2, 'Muy moralmente apropiado'],
        ],
        widget=widgets.RadioSelect
    )
    TJ11 = models.CharField(max_length=2, choices=J11)

当我尝试证明此代码时，出现下一个错误：

File "C:\Users\diese\iat\incentivos\models.py", line 140, in <module>
 class Player(BasePlayer):
File "C:\Users\diese\iat\incentivos\models.py", line 216, in Player
 TJ11 = models.CharField(max_length=2, choices=J11)
File "c:\users\diese\appdata\local\programs\python\python37\lib\site-packages\otree\db\models.py",   line 386, in __init__super().__init__(max_length=max_length, **kwargs)
File "c:\users\diese\appdata\local\programs\python\python37\lib\site-packages\otree\db\models.py", line 217, in __init__
fix_choices_arg(kwargs)
File "c:\users\diese\appdata\local\programs\python\python37\lib\site-packages\otree\db\models.py",   line 195, in fix_choices_arg
choices = expand_choice_tuples(choices)
File "c:\users\diese\appdata\local\programs\python\python37\lib\site- packages\otree\common_internal.py", line 118, in expand_choice_tuples
if not isinstance(choices[0], (list, tuple)):
TypeError: 'IntegerField' object is not subscriptable

我能做些什么？ 有人有过同样的经历吗？

提前致谢

Answer 1

您可以在定义字段之前定义选项，然后将这些选项分配给该字段。 这允许您将这些选择分配给多个字段：

MY_CHOICES = (
    (-2, 'Muy moralmente inapropiado'),
    (-1, 'Moralmente inapropiado'),
    (0, 'No aplica'),
    (1, 'Moralmente apropiado'),
    (2, 'Muy moralmente apropiado'),
)
J11 = models.IntegerField(choices=MY_CHOICES)
TJ12 = models.CharField(max_length=20, choices=MY_CHOICES)