Question

我在尝试编辑时在管理页面中遇到问题。在下面的图片中，您可以看到它（额外的“需要字段”）。当我尝试编辑时，我看到一个额外的行。我有点自定义会员块与我自己的形式因为我想在'角色'字段中向管理员显示'经理'值。它工作但编辑引发错误。顺便说一句，当我不使用自定义表单编辑工作没有问题，尽管有额外的行。在下面你可以看到我的代码。所以我很满意。我怎么解决这个问题？我还尝试使用awk 'FNR==1{ cnt=split(FILENAME, arr, "/"); basename=arr[cnt] } { print $0, basename}'格式__init__和self.fields['user'].required = False，但它没有帮助。

models.py ：

self.fields['role'].required = False

admin.py ：

class Project(models.Model):
    ***FIELDS***
    members = models.ManyToManyField(User, through='Membership',)


ROLE_CHOICES = (
        ('manager', 'Manager'),
        ('developer', 'Developer'),
        ('business_analyst', 'Business analyst'),
        ('system_analysts', 'System analysts'),
)


class Membership (models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE)
    project = models.ForeignKey(Project, on_delete=models.CASCADE)
    role = models.CharField(max_length=20, choices=ROLE_CHOICES,)

forms.py ：

class MembershipInline(admin.TabularInline):
    model = Membership
    form = MembershipAdminForm
    extra = 1


class MembershipAdmin(admin.ModelAdmin):
    inlines = (MembershipInline,)

admin.site.register(Project, MembershipAdmin)

错误：

class MembershipAdminForm(forms.ModelForm):
    class Meta:
        model = Membership
        fields = '__all__'

    def __init__(self, *args, **kwargs):
        super(MembershipAdminForm, self).__init__(*args, **kwargs)
        self.fields['role'].choices = tuple(choice for choice in ROLE_CHOICES if choice[0] not in ['developer', 'business_analyst', 'system_analysts'])

Answer 1

将blank=True和null=True添加到您希望成为可选字段：

class Membership (models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE, blank=True, null=True)
    project = models.ForeignKey(Project, on_delete=models.CASCADE)
    role = models.CharField(max_length=20, choices=ROLE_CHOICES, blank=True, null=True)

Answer 2

好吧，毕竟我在Django的官方文档中找到了解决方案。在我的管理员。 py文件我添加了max_num = 1。

如果max_num的值大于现有相关的数量对象，最多额外的空白表格将被添加到 formset，只要表单总数不超过max_num

class MembershipInline(admin.TabularInline):
    model = Membership
    form = MembershipAdminForm
    extra = 1
    max_num = 1

管理页面中出现额外引发错误

2 个答案: