[Django管理员更改视图，如果值为None，则排除字段

Question

当前，如果其值为None，我需要从变更视图中删除一些字段

所以我有一个这样的提款模型管理员：

class WithdrawalsAdminForm(forms.ModelForm):
    def __init__(self, *args, **kwargs):
        super(WithdrawalsAdminForm, self).__init__(*args, **kwargs)
        none_fields = []
        for single_field in self.fields:
            self.fields[single_field].disabled = True
            if self.initial[single_field] == None:
                none_fields.append(single_field)
        if none_fields:
            for single_none_field in none_fields:
                self.fields.pop(single_none_field)

class WithdrawalsAdmin(admin.ModelAdmin):
    list_display = ('get_email', 'get_phone_number', 'currency', 'method', 'amount', 'status', 'created')
    list_display_links = ('get_email', 'get_phone_number', 'currency', 'method', 'amount', 'status', 'created')
    list_filter = [WithdrawalsStatusFilter] #just a custom list filter
    change_form_template = 'admin/backend/withdrawals_change_form.html'
    form = WithdrawalsAdminForm
    fields = (
        'id',
        'get_email',
        'get_phone_number',
        'get_full_name',
        'currency', 
        'method',
        'to_bank',
        'to_address',
        'to_card', 
        'amount', 
        'status', 
        'transaction_id',
        'created', 
        'submitted',
        'confirmed',
        )
    readonly_fields = (
        'id',
        'get_email',
        'get_phone_number',
        'get_full_name',
        'created', 
    )

    def has_add_permission(self, request, obj=None):
        return False

    def get_queryset(self, request):
        qs = super(WithdrawalsAdmin, self).get_queryset(request)
        return qs.filter(Q(method=1) | Q(method=4))

    def get_email(self, obj):
        return obj.user.email
    get_email.short_description = 'User email'
    get_email.admin_order_field = 'EMAIL'

    def get_phone_number(self, obj):
        return obj.user.phone_number
    get_phone_number.short_description = 'User phone number'
    get_phone_number.admin_order_field = 'PHONE NUMBER'

    def get_full_name(self, obj):
        try:
            user_kyc = UserKyc.objects.get(user=obj.user)
            return decrypt_string(user_kyc.full_name)
        except:
            return None
    get_full_name.short_description = 'User full name'
    get_full_name.admin_order_field = 'FULL NAME'


admin.site.register(Withdrawals, WithdrawalsAdmin)

但是它向我返回了以下错误：

“在'WithdrawalsForm'中找不到关键字'to_address'。选择包括：金额，货币，方法，状态，到银行。“

金额，货币，方法，状态，to_bank的值在对象中都不为None

to_address的值为None，我也曾尝试打印出if self.initial[single_field] == None:中不存在的任何字段，并获得了具有None值的正确字段名称（其中包含to_address）。

如何从更改视图中排除无值的字段？

Answer 1

您可能想要重写get_fields和get_readonly_fields方法：