DJango, custom filter with list_display custom method-CodePudding

I'm trying to filter by the custom method i made for language column. In admin.py i have the following;

from django.contrib import admin
from .models import *

class MovieAdminModel(admin.ModelAdmin):
    search_fields= ('title_en')
    list_display = ('get_language',)
    list_filter = ('get_language')

    def get_language(self, obj):
        if obj.language==1:
            return 'Persian With English Subtitle'
        else:
            return 'Persian'
        
    get_language.admin_order_field = "language"
    get_language.short_description = "language"

In list_filter i use get_language and this error is returned The value of 'list_filter[0]' refers to 'get_language', which does not refer to a Field. If i use language in list_filter , the filters shows yes or no. Filter should show either Persian With English Subtitle or Persian. How do i solve?

CodePudding user response：

You need to create a custom admin filter for this task, something like this:

from django.contrib.admin import SimpleListFilter

class LanguageFilter(SimpleListFilter):
    title = 'Language'
    parameter_name = 'language'

    def lookups(self, request, model_admin):
        return [
            ('Persian With English Subtitle', 'Persian With English Subtitle'),
            ('Persian', 'Persian')
        ]

    def queryset(self, request, queryset):
        value = self.value()
        if value == 'Persian With English Subtitle':
            return queryset.filter(language=1)
        return queryset.exclude(language=1)

class MovieAdminModel(admin.ModelAdmin):
    list_filter = (
        LanguageFilter,
    )
    ...