# Dokumentasi Django 5.2.8

# Tindakan admin

Alir kerja dasar dari admin Django adalah, dalam kulit kacang, "pilih sebuah obyek, kemudian rubah itu." Ini bekerja baik untuk kebanyakan penggunaan kasus. Bagaimanapun, jika anda butuh perubahan sama ke banyak obyek sekali waktu, alir kerja ini bisa sangat membosankan.

In these cases, Django's admin lets you write and register "actions" -- functions that get called with a list of objects selected on the change list page.

Jika anda mencari daftar perubahan apapun di admin, anda akan melihat fitur ini di tindakan; Django dikirim dengan tindakan "menghapus obyek terpilih" tersedia untuk semua model. Sebagai contoh, ini adalah modul pengguna dari aplikasi `django.contrib.auth` pasang-tetap Django :

Peringatan

Tindakan "hapus obyek-obyek terpilih" menggunakan `QuerySet.delete()` untuk alasan efesiensi, yang mempunyai surat keberatan yang penting: metode `delete()` model anda tidak akan dipanggil.

Jika anda berharap menimpa perilaku ini, anda dapat menimpa `ModelAdmin.delete_queryset()` atau menulis penyesuaian tindakan yang melakukan penghapusan dalam perilaku anda pilih -- sebagai contoh, dengan memanggil `Model.delete()` untuk setiap dari barang terpilih.

Untuk latar belakang lebih pada penghapusan jumlah besar, lihat dokumentasi pada object deletion.

Baca untuk menemukan bagaimana menambah tindakan anda sendiri ke daftar ini.

## Menulis tindakan

Cara mudah untukmenjelaskan tindakan adalah dengan contoh, jadi mari kita selami.

A common use case for admin actions is the bulk updating of a model. Imagine a news application with an `Article` model:

    from django.db import models

    STATUS_CHOICES = {
        "d": "Draft",
        "p": "Published",
        "w": "Withdrawn",
    }

    class Article(models.Model):
        title = models.CharField(max_length=100)
        body = models.TextField()
        status = models.CharField(max_length=1, choices=STATUS_CHOICES)

        def __str__(self):
            return self.title

Tugas utama kami mungkin lakukan dengan sebuah model seperti ini adalah memperbaharui sebuah keadaan article dari "draft" menjadi "published". Kami dapat dengan mudah melakukan ini di admin satu artikel pada sekali waktu, tetapi jika kami ingin menerbitkan-jumlah besar kelompok dari artikel, itu akan membosankan. Jadi, mari kita menulis sebuah tindakan yang membuat kita merubah sebuah keadaan artikel menjadi "published."

### Menulis fungsi tindakan

First, we'll need to write a function that gets called when the action is triggered from the admin. Action functions are regular functions that take three arguments:

- `ModelAdmin` saat ini

- Sebuah `HttpRequest` mewakili permintaan saat ini,

- Sebuah `QuerySet` mengandung sekumpulan dari obyek-obyek terpilih oleh pengguna.

Fungsi terbitan-artikel-ini kami tidak butuh `ModelAdmin` atau obyek permintaan, tetapi kami akan menggunakan queryset:

    def make_published(modeladmin, request, queryset):
        queryset.update(status="p")

Catatan

For the best performance, we're using the queryset's update method. Other types of actions might need to deal with each object individually; in these cases we'd iterate over the queryset:

    for obj in queryset:
        do_something_with(obj)

That's actually all there is to writing an action! However, we'll take one more optional-but-useful step and give the action a "nice" title in the admin. By default, this action would appear in the action list as "Make published" -- the function name, with underscores replaced by spaces. That's fine, but we can provide a better, more human-friendly name by using the `action()` decorator on the `make_published` function:

    from django.contrib import admin

    ...

    @admin.action(description="Mark selected stories as published")
    def make_published(modeladmin, request, queryset):
        queryset.update(status="p")

Catatan

This might look familiar; the admin's `list_display` option uses a similar technique with the `display()` decorator to provide human-readable descriptions for callback functions registered there, too.

### Menambahkan tindakan pada `ModelAdmin`

Selanjutnya, kami akan butuh menginformasikan `ModelAdmin` kami dari tindakan. Ini bekerja seperti piliha konfigurasi lain apapun. Jadi, `admin.py` lengkap dengan tindakan dan pendaftarannya akan terlihat seperti:

    from django.contrib import admin
    from myapp.models import Article

    @admin.action(description="Mark selected stories as published")
    def make_published(modeladmin, request, queryset):
        queryset.update(status="p")

    class ArticleAdmin(admin.ModelAdmin):
        list_display = ["title", "status"]
        ordering = ["title"]
        actions = [make_published]

    admin.site.register(Article, ArticleAdmin)

Kode akan memberikan kami sebuah daftar rubah admin yang terlihat sesuatu seperti ini:

That's really all there is to it! If you're itching to write your own actions, you now know enough to get started. The rest of this document covers more advanced techniques.

### Penanganan kesalahan di tindakan

Jika ada kondisi kesalahan mendatang yang mungkin muncul selagi menjalankan tindakan anda, anda harus anggun menginformasikan pengguna dari masalah. Ini berarti menangani pengecualian dan menggunakan `django.contrib.admin.ModelAdmin.message_user()` untuk memperlihatkan gambaran yang ramah pengguna dari masalah di tanggapan.

## Teknik-teknik tindakan lanjutan

Ada sepasang pilihan tambahan dan kemungkinan anda dapat menggunakan lebih pilihan lanjutan

### Tindakan sebagai metode `ModelAdmin`

The example above shows the `make_published` action defined as a function. That's perfectly fine, but it's not perfect from a code design point of view: since the action is tightly coupled to the `Article` object, it makes sense to hook the action to the `ArticleAdmin` object itself.

Anda dapat melakukan itu seperti ini:

    class ArticleAdmin(admin.ModelAdmin):
        ...

        actions = ["make_published"]

        @admin.action(description="Mark selected stories as published")
        def make_published(self, request, queryset):
            queryset.update(status="p")

Perhatikan pertama yang kami telah pindahkan `make_published` kedalam metode dan dinamai kembali parameter `modeladmin` pada `self`, dan kedua kami telah sekarang menaruh string `'make_published'` dalam `actions` daripada acuan fungsi langsung. Ini mengatakan `ModelAdmin` untuk mencari tindakan sebagai sebuah metode.

Defining actions as methods gives the action more idiomatic access to the `ModelAdmin` itself, allowing the action to call any of the methods provided by the admin.

For example, we can use `self` to flash a message to the user informing them that the action was successful:

    from django.contrib import messages
    from django.utils.translation import ngettext

    class ArticleAdmin(admin.ModelAdmin):
        ...

        def make_published(self, request, queryset):
            updated = queryset.update(status="p")
            self.message_user(
                request,
                ngettext(
                    "%d story was successfully marked as published.",
                    "%d stories were successfully marked as published.",
                    updated,
                )
                % updated,
                messages.SUCCESS,
            )

Ini membuat tindakan cocok apa yang admin itu sendiri lakukan setelah berhasil melakukan sebuah tindakan:

### Tindakan yang menyediakan halaman menengah

By default, after an action is performed the user is redirected back to the original change list page. However, some actions, especially more complex ones, will need to return intermediate pages. For example, the built-in delete action asks for confirmation before deleting the selected objects.

To provide an intermediary page, return an `HttpResponse` (or subclass) from your action. For example, you might write an export function that uses Django's serialization functions to dump some selected objects as JSON:

    from django.core import serializers
    from django.http import HttpResponse

    def export_as_json(modeladmin, request, queryset):
        response = HttpResponse(content_type="application/json")
        serializers.serialize("json", queryset, stream=response)
        return response

Generally, something like the above isn't considered a great idea. Most of the time, the best practice will be to return an `HttpResponseRedirect` and redirect the user to a view you've written, passing the list of selected objects in the GET query string. This allows you to provide complex interaction logic on the intermediary pages. For example, if you wanted to provide a more complete export function, you'd want to let the user choose a format, and possibly a list of fields to include in the export. The best thing to do would be to write a small action that redirects to your custom export view:

    from django.contrib.contenttypes.models import ContentType
    from django.http import HttpResponseRedirect

    def export_selected_objects(modeladmin, request, queryset):
        selected = queryset.values_list("pk", flat=True)
        ct = ContentType.objects.get_for_model(queryset.model)
        return HttpResponseRedirect(
            "/export/?ct=%s&ids=%s"
            % (
                ct.pk,
                ",".join(str(pk) for pk in selected),
            )
        )

As you can see, the action is rather short; all the complex logic would belong in your export view. This would need to deal with objects of any type, hence the business with the `ContentType`.

Meunlis tampilan ini adalah sisa dari sebuah latihan ke pembaca.

### Membuat tindakan tersedia lebar-situs

AdminSite.add_action(action, name=None)

  Some actions are best if they're made available to any object in the admin site -- the export action defined above would be a good candidate. You can make an action globally available using `AdminSite.add_action()`. For example:

      from django.contrib import admin

      admin.site.add_action(export_selected_objects)

  This makes the `export_selected_objects` action globally available as an action named "export_selected_objects". You can explicitly give the action a name -- good if you later want to programmatically remove the action -- by passing a second argument to `AdminSite.add_action()`:

      admin.site.add_action(export_selected_objects, "export_selected")

### Meniadakan tindakan

Terkadang anda butuh meniadakan beberapa tindakan -- khususnya itu registered site-wide -- untuk obyek-obyek tertentu. Ada sedikit cara anda dapat meniadakan tindakan:

#### Meniadakan tindakan lebar-situs

AdminSite.disable_action(name)

  If you need to disable a site-wide action you can call `AdminSite.disable_action()`.

  Sebagai contoh, anda dapat menggunakan metode ini memindahkan tindakan "delete selected objects" siap-pakai:

      admin.site.disable_action("delete_selected")

  Sekali anda telah melakukan diatas, tindakan itu akan tidak lagi tersedia lebar-situs.

  If, however, you need to reenable a globally-disabled action for one particular model, list it explicitly in your `ModelAdmin.actions` list:

      # Globally disable delete selected
      admin.site.disable_action("delete_selected")

      # This ModelAdmin will not have delete_selected available
      class SomeModelAdmin(admin.ModelAdmin):
          actions = ["some_other_action"]
          ...

      # This one will
      class AnotherModelAdmin(admin.ModelAdmin):
          actions = ["delete_selected", "a_third_action"]
          ...

#### Meniadakan semua tindakan untuk `ModelAdmin` tertentu

If you want no bulk actions available for a given `ModelAdmin`, set `ModelAdmin.actions` to `None`:

    class MyModelAdmin(admin.ModelAdmin):
        actions = None

Ini memberitahu `ModelAdmin` untuk tidak memperlihatkan atau mengizinkan tindakan apapun, termasuk site-wide actions apapun.

#### Tindakan mengadakan dan meniadakan bersyarat

ModelAdmin.get_actions(request)

  Akhirnya, anda dapat secara kondisional mengadakan atau meniadakan tindakan-tindakan pada sebuah per-permintaan (dan karenanya berdasarkan per-pengguna) dengan mengutamakan `ModelAdmin.get_actions()`.

  Ini mengembalikan sebuah kamus dari tindakan diizinkan. Kunci-kunci adalah nama-nama tindkan, dan nilai-nilai adalah tuple `(function, name, short_description)`.

  Sebagai contoh, jika anda hanya ingin pengguna yang namanya dimulai dengan 'J' untuk dapat menghapus obyek-pbyek dalam jumlah besar:

      class MyModelAdmin(admin.ModelAdmin):
          ...

          def get_actions(self, request):
              actions = super().get_actions(request)
              if request.user.username[0].upper() != "J":
                  if "delete_selected" in actions:
                      del actions["delete_selected"]
              return actions

### Pengaturan perizinan untuk tindakan

Actions may limit their availability to users with specific permissions by wrapping the action function with the `action()` decorator and passing the `permissions` argument:

    @admin.action(permissions=["change"])
    def make_published(modeladmin, request, queryset):
        queryset.update(status="p")

Tindakan `make_published()` hanya akan tersedia pada pengguna yang melewatkan pemeriksaan `ModelAdmin.has_change_permission()`.

If `permissions` has more than one permission, the action will be available as long as the user passes at least one of the checks.

Available values for `permissions` and the corresponding method checks are:

- `'add'`: `ModelAdmin.has_add_permission()`

- `'change'`: `ModelAdmin.has_change_permission()`

- `'delete'`: `ModelAdmin.has_delete_permission()`

- `'view'`: `ModelAdmin.has_view_permission()`

Anda dapat menentukan nilai lain apapun selama anda menerapkan metode `has__permission(self, request)` sesuai pada `ModelAdmin`.

Sebagai contoh:

    from django.contrib import admin
    from django.contrib.auth import get_permission_codename

    class ArticleAdmin(admin.ModelAdmin):
        actions = ["make_published"]

        @admin.action(permissions=["publish"])
        def make_published(self, request, queryset):
            queryset.update(status="p")

        def has_publish_permission(self, request):
            """Does the user have the publish permission?"""
            opts = self.opts
            codename = get_permission_codename("publish", opts)
            return request.user.has_perm("%s.%s" % (opts.app_label, codename))

## The `action` decorator

action(*, permissions=None, description=None)

  This decorator can be used for setting specific attributes on custom action functions that can be used with `actions`:

      @admin.action(
          permissions=["publish"],
          description="Mark selected stories as published",
      )
      def make_published(self, request, queryset):
          queryset.update(status="p")

  This is equivalent to setting some attributes (with the original, longer names) on the function directly:

      def make_published(self, request, queryset):
          queryset.update(status="p")

      make_published.allowed_permissions = ["publish"]
      make_published.short_description = "Mark selected stories as published"

  Use of this decorator is not compulsory to make an action function, but it can be useful to use it without arguments as a marker in your source to identify the purpose of the function:

      @admin.action
      def make_inactive(self, request, queryset):
          queryset.update(is_active=False)

  In this case it will add no attributes to the function.

  Action descriptions are %-formatted and may contain `'%(verbose_name)s'` and `'%(verbose_name_plural)s'` placeholders, which are replaced, respectively, by the model's `verbose_name` and `verbose_name_plural`.