整个模型是只读的 [英] Whole model as read-only

问题描述

有没有办法在django管理员中设置模型只读？但我的意思是整个模型。
所以，没有添加，不删除，没有改变，只看对象和字段，一切都是只读的？

Is there a way to make a model read-only in the django admin? but I mean the whole model. So, no adding, no deleting, no changing, just see the objects and the fields, everything as read-only?

推荐答案

ModelAdmin提供钩子get_readonly_fields（） - 以下是未经测试的，我的想法是确定ModelAdmin所做的所有字段，而不用直接使用readonly字段进行递归：

ModelAdmin provides the hook get_readonly_fields() - the following is untested, my idea being to determine all fields the way ModelAdmin does it, without running into a recursion with the readonly fields themselves:

from django.contrib.admin.util import flatten_fieldsets

class ReadOnlyAdmin(ModelAdmin):
    def get_readonly_fields(self, request, obj=None):
        if self.declared_fieldsets:
            fields = flatten_fieldsets(self.declared_fieldsets)
        else:
            form = self.get_formset(request, obj).form
            fields = form.base_fields.keys()
        return fields

then子类/ mixin此管理员应该是只读管理员。

then subclass/mixin this admin whereever it should be a read-only admin.

添加/删除，并使其按钮失效梨，你可能还想添加

For add/delete, and to make their buttons disappear, you'll probably also want to add

    def has_add_permission(self, request):
        # Nobody is allowed to add
        return False
    def has_delete_permission(self, request, obj=None):
        # Nobody is allowed to delete
        return False

PS：在ModelAdmin中，如果has_change_permission（查找或重写）返回False，则不会访问对象的更改视图，而链接到它将不会显示。它实际上会很酷，如果这样做，默认的get_readonly_fields（）检查更改权限，并在所有情况下将所有字段设置为只读，如上所述。这样，无变化者可以至少浏览数据...鉴于当前的管理结构假设view = edit，正如jathanism指出的，这可能需要在添加/更改/删除之前引入视图权限...

P.S.: In ModelAdmin, if has_change_permission (lookup or your override) returns False, you don't get to the change view of an object - and the link to it won't even be shown. It would actually be cool if it did, and the default get_readonly_fields() checked the change permission and set all fields to readonly in that case, like above. That way non-changers could at least browse the data... given that the current admin structure assumes view=edit, as jathanism points out, this would probably require the introduction of a "view" permission on top of add/change/delete...

编辑：关于设置所有字段readonly，也未经测试但看起来很有希望：

regarding setting all fields readonly, also untested but looking promising:

readonly_fields = MyModel._meta.get_all_field_names()

编辑：另一个

if self.declared_fieldsets:
    return flatten_fieldsets(self.declared_fieldsets)
else:
    return list(set(
        [field.name for field in self.opts.local_fields] +
        [field.name for field in self.opts.local_many_to_many]
    ))

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