我有一个无趣的模型。其中一个模型字段occupation是一个表的外键，该表包含一个很长的选项列表。问题是对于更新，通过crispy呈现的呈现表单没有将焦点设置为存储值（在<select><option...>代码中将其标记为选定选项）。相反，它显示了空的选择。我看到初始值确实指向数据库记录的id。
为了让这个过程更“有趣”一点，我想把occupation.to_field_name改为occupation.code（一个字符域）。我一直futzing与形式的init如下所示。我可以将选项值转换为所需的形式，但无法使该形式将存储的值显示为选定值（并显示为字段的选定值）。
我该怎么做？我必须通过JS来做吗？或者我在表单上做错了什么？谢谢.

class Meta:
        model = TutorOptionalServiceAndDemographics
        fields = ['highest_degree',
                  'country_of_birth',
                  'immigrant',
                  'us_citizen',
                  'employment_status_at_enrollment',
                  'occupation',
                  'employer_name',
                  'referral',
                  ]

        labels = {
            'highest_degree': 'Highest degree/diploma earned',
            'us_citizen': 'US Citizen:',
            'immigrant': 'Immigrant:',
            'country_of_birth': 'Country of Birth:',
            'employment_status_at_enrollment': 'Employment status at time of registration:',
            'occupation': 'Occupation:',
            'employer_name': 'Employer Name:',
            'referral': 'Referred by or heard about the program from source:',
        }

        help_texts = {
            'employment_status_at_enrollment': '',
            'referral': 'Select all that apply',
        }

        yes_no = [('True', 'Yes'), ('False', 'No')]
        widgets = {
            'immigrant': HorizontalRadioSelect(choices=yes_no),
            'us_citizen': HorizontalRadioSelect(choices=yes_no),
        }

    def __init__(self, *args, **kwargs):
        super(TutorOptionalForm, self).__init__(*args, **kwargs)

        # futzing goes here

        self.helper = FormHelper(self)
        self.helper.attrs['autocomplete'] = 'off'
        self.helper.form_id = 'id-gather-name'
        self.helper.form_class = 'form-horizontal'
        self.helper.form_method = 'post'
        # self.helper.form_action = ''
        self.helper.label_class = 'col-5'
        self.helper.field_class = 'col-6'
        self.helper.form_tag = False

        self.helper.layout = Layout(
            'highest_degree',
            'country_of_birth',
            InlineRadios('immigrant'),
            InlineRadios('us_citizen'),
            'employment_status_at_enrollment',
            'occupation',
            'employer_name',
            'referral',
        )

# for i in self.fields['occupation']._queryset:
        #     print(f"i is {i} {i.id}")
        initial_value = [x for x in self.fields['occupation']._queryset if x.id ==  self.initial['occupation']]
        print(f"initial value is {initial_value[0].code}")
        self.fields['occupation'].initial = initial_value[0].code
        self.fields['occupation'].to_field_name = 'code'
        pprint(vars(self.fields['occupation']))
        # print("widget")
        # pprint(vars(self.fields['occupation'].widget))
        # try:
        #     actual_occupation = Occupation.objects.get(id=29)
        # this is a hardcoded example just trying to figure out what's happening
        #     self.fields['occupation'].initial = actual_occupation.code
        # except Occupation.DoesNotExist:
        #     self.fields['occupation'].initial = ""
        # print(f"after ")
        # pprint(vars(self.fields['occupation']))