Django admin：使字段在添加中可编辑但不可编辑

发布于 2024-12-11 15:12:02 字数 286 浏览 2 评论 0原文

我有一个与此类似的模型：

class Product(models.Model):
    third_party_id = models.CharField(max_length=64, blank=False, unique=True)

它使用 Django 默认主键。我希望用户能够通过在添加页面上设置third_party_id来添加产品，但我不希望该字段在编辑页面中可编辑，以避免损坏third_party_id。在 Django 文档中，相同的设置似乎用于添加和编辑。这可能吗？

原文

I've got a model similar to this:

class Product(models.Model):
    third_party_id = models.CharField(max_length=64, blank=False, unique=True)

that uses the Django default primary key. I want users to be able to add products by setting the third_party_id on the add page, but I don't want that field editable in the edit page to avoid corrupting the third_party_id. In the Django docs, the same settings appear to be used for add and edit. Is this possible?

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郁金香雨 2024-12-18 15:12:02

不要设置 self.readonly_fields 以避免线程问题。而是重写 get_readonly_fields 方法：

def get_readonly_fields(self, request, obj=None):
    if obj: # obj is not None, so this is an edit
        return ['third_party_id',] # Return a list or tuple of readonly fields' names
    else: # This is an addition
        return []

Do not set self.readonly_fields to avoid thread issues. Instead override get_readonly_fields method:

def get_readonly_fields(self, request, obj=None):
    if obj: # obj is not None, so this is an edit
        return ['third_party_id',] # Return a list or tuple of readonly fields' names
    else: # This is an addition
        return []

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紅太極 2024-12-18 15:12:02

上面的内容很有帮助（shanyu 使用 get_readonly_fields 的答案），但是如果在“StackedInline”中使用它则无法正常工作。结果是任何标记为只读的字段的两个副本，并且在“add”实例中不可编辑。看到这个错误： https://code.djangoproject.com/ticket/15602

希望这可以拯救某人一些搜索！

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゛清羽墨安 2024-12-18 15:12:02

我不确定这是否是最好的方法，但您可以为管理员定义自己的表单。并自定义验证您的third_party_id，如果已设置则拒绝：

Admin.py

class ProductAdminForm(forms.ModelForm):
    class Meta:
        model = Product

    def clean_third_party_id(self):
        cleaned_data = self.cleaned_data
        third_party_id = cleaned_data['third_party_id']
        id = cleaned_data['id']
        obj = Product.objects.get(id=id)
        if obj.third_party_id != third_party_id:
            raise ValidationError("You cannot edit third_party_id, it must stay as %s" % obj.third_party_id)
         return third_party_id


class ProductAdmin(admin.Admin):
    form = [ProductAdminForm,]

I am not sure if this is the best way, but you could define your own form for the admin. And custom validate your third_party_id, rejecting if it is already set:

Admin.py

class ProductAdminForm(forms.ModelForm):
    class Meta:
        model = Product

    def clean_third_party_id(self):
        cleaned_data = self.cleaned_data
        third_party_id = cleaned_data['third_party_id']
        id = cleaned_data['id']
        obj = Product.objects.get(id=id)
        if obj.third_party_id != third_party_id:
            raise ValidationError("You cannot edit third_party_id, it must stay as %s" % obj.third_party_id)
         return third_party_id


class ProductAdmin(admin.Admin):
    form = [ProductAdminForm,]

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