如果值为 None，Django 管理员更改视图排除字段

Question

目前我需要从更改视图中删除一些字段，如果它的值为 None

所以我有一个提款模型的管理员，如下所示：

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)

但它返回给我以下错误：

"Key 'to_address' not found in 'WithdrawalsForm'. Choices are: amount, currency, method, status, to_bank."

数量、货币、方法、状态，to_bank在对象

中都没有None的值

to_address 值为 None，我还尝试打印出 if self.initial[single_field] == None: 中 none 的任何字段并获得正确的字段名称（包括 to_address 在其中）具有 None 值。

如何从更改视图中排除具有 None 值的字段？

Answer 1

您可能想要重写 get_fields 和 get_readonly_fields 方法：

def _get_non_field_names(self, obj, candidate_fields):
    for field in candidate_fields:
        if hasattr(obj, field) and getattr(obj, field):
            yield field
        elif getattr(self, field)(obj):
            yield field

def get_fields(self, request, obj=None):
    form = self._get_form_for_get_fields(request, obj)
    candidate_fields = self.fields if self.fields else list(form.base_fields)
    fields = self._get_non_field_names(obj, candidate_fields)

    readonly_fields = list(self.get_readonly_fields(request, obj))
    return list(fields) + readonly_fields

def get_readonly_fields(self, request, obj=None):
    candidate_readonly_fields = self.readonly_fields
    readonly_fields = list(self._get_non_field_names(obj, candidate_readonly_fields))
    return readonly_fields

Answer 2

困难的部分仍然是检查自定义字段的 None 值。

目前我只使用下面的get_fields来检查，不太合乎逻辑，但仍然可以从表单中删除字段：

def get_fields(self, request, obj=None):
    fields = super(WithdrawalsAdmin, self).get_fields(request, obj)
    fields_list = list(fields)
    if obj:
        if obj.to_address is None:
            fields_list.remove('to_address')
        .... #and other fields
    fields_tuple = tuple(fields_list)
    return fields_tuple

如果值为 None，Django 管理员更改视图排除字段

Django admin change view exclude field if value is None

python

django

django-admin