django 更新模型时未显示所选的存储值

Question

我有一个无趣的模型。模型字段之一“职业”是包含一长串选项的表的外键。问题是更新时，通过脆皮渲染的渲染表单没有将焦点设置到存储的值（将其标记为

<select><option...>

代码中的选定选项）。相反，它显示空选择。我看到初始值确实指向数据库记录的id。

为了让这个更“有趣”，我想将

occupation.to_field_name

更改为

occupation.code

（charfield）。我一直在研究表格的

init

，如下所示。我可以将选项值转换为我想要的形式，但我无法让表单将存储的值呈现为选定的值（并呈现为字段的选定值）。

我该怎么做？我必须通过 JS 来完成还是我的表单做错了什么？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']))

Answer 1

我通过在 document.ready 上添加一个 js 函数并在上下文中传递答案来解决这个问题。这是一个简单的循环，遍历选择选项，然后将选定的属性添加到右侧选项。

我仍然想知道如何仅使用 django 对象正确完成此操作。看来我做错了什么或者没有正确初始化表单上的小部件或字段。