Django admin - 将所有字段设为只读

Question

I'm trying to make all fields readonly without listing them explicitly.

Something like:

class CustomAdmin(admin.ModelAdmin):
    def get_readonly_fields(self, request, obj=None):
        if request.user.is_superuser:
            return self.readonly_fields

        return self.fields

The problem is CustomAdmin.fields is not set at this point.

Any ideas?

Answer 1

Careful, self.model._meta.fields are not necessarily the same fields that CustomAdmin has!

"All fields of the Admin" would look more like this:

from django.contrib import admin
from django.contrib.admin.utils import flatten_fieldsets

class CustomAdmin(admin.ModelAdmin):
    def get_readonly_fields(self, request, obj=None):
        if request.user.is_superuser:
            return self.readonly_fields

        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]
            ))

Answer 2

Since django 2.1, you can prevent editing, while allowing viewing, by returning False from the ModelAdmin 's has_change_permission method, like this:

class CustomAdmin(admin.ModelAdmin):
    def has_change_permission(self, request, obj=None):
        return False

(This will not work before django 2.1, as it will also deny permission to any user trying only to view.)

Answer 3

Ok, now there's this:

class CustomAdmin(admin.ModelAdmin):
    def get_readonly_fields(self, request, obj=None):
        # ...

        return [f.name for f in self.model._meta.fields]

Still looking for a less ugly way.

Answer 4

You could iterate through the model meta fields:

def get_readonly_fields(self, request, obj=None):
    if obj:
        self.readonly_fields = [field.name for field in obj.__class__._meta.fields]
    return self.readonly_fields

Answer 5

For Inlines (Tab or Stack)

def get_readonly_fields(self, request, obj=None):
    fields = []
    for field in self.model._meta.get_all_field_names():
        if field != 'id':
            fields.append(field)
    return fields

def has_add_permission(self, request):
    return False

Answer 6

This worked for me with Django 1.10

def get_readonly_fields(self, request, obj=None):
    if request.user.is_superuser:
        return self.readonly_fields

    return list(set(
        [field.name for field in self.opts.local_fields] +
        [field.name for field in self.opts.local_many_to_many]
    ))

Answer 7

If someone still lookign for better way, you can use it like this:

@admin.register(ClassName)
class ClassNameAdmin(admin.ModelAdmin):
    readonly_fields = [field.name for field in ClassName._meta.fields]

ClassName is your Model class.

Answer 8

My requirement was similar . I needed only one field to be shown as read-only . And this worked fine:

class ChoiceInline(admin.TabularInline):
    model = Choice
    extra = 1
    fields = ['choice_text', 'votes']
    readonly_fields = ['votes']

class QuestionAdmin(admin.ModelAdmin):
    #fields = ['pub_date', 'question_text']
    fieldsets = [
        (None, {'fields': ['question_text']}),
        ('Date Information', {'fields': ['pub_date']}),
    ]
    search_fields = ['question_text']


    inlines = [ChoiceInline]

Refer : C:\\Python27\\Lib\\site-packages\\django\\contrib\\admin\\options.py

Answer 9

Say you have defined user_mode as;

Admin, Customers and Staff

If you'd like to deny a staff (and of course, customers) the privilege of deleting a customer, product, order etc...

Your code goes;

def get_readonly_fields(self, request: HttpRequest, obj=None):
    if request.user.user_mode != "Admin":
        return self.readonly_fields + ['user_mode']
    return super().get_readonly_fields(request, obj)

where user_mode = a model field holding the type of user.

NB: my code uses "Pylance" (like typescript in JS)

Answer 10

With get_fieldsets you get all fields from the form

def get_readonly_fields(self, request, obj=None):
    readonly = []
    for fs in self.get_fieldsets(request, obj):
        if len(fs) > 1:
            readonly += fs[1].get('fields', [])
    return readonly

Answer 11

@admin.register(Hero)
class HeroAdmin(admin.ModelAdmin, ExportCsvMixin):
    ...
    readonly_fields = ["father", "mother", "spouse"]

reference : https://books.agiliq.com/projects/django-admin-cookbook/en/latest/changeview_readonly.html