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Python Customizing the Django Admin Customizing the List View Test: Custom Filters

[Customizing django admin] SimpleListFilter Error!

Create the queryset method. Remember that this method takes in self, request, and queryset as arguments. In the method, check to see if self.value() returns anything. If it does, .filter() the queryset for records where the title contains the value. Use contains for the comparison.

=> I don't Know why it's Error!.

This is my error:

     **Bummer! The queryset() method needs to call filter() on its 'queryset' argument.**

Please help me?

from django.contrib import admin

from . import models

class TextInline(admin.StackedInline):
    model = models.Text

class QuizInline(admin.StackedInline):
    model = models.Quiz

class AnswerInline(admin.StackedInline):
    model = models.Answer

class TopicListFilter(admin.SimpleListFilter):
    title = 'topic'
    parameter_name = 'topic'

    def lookups(self, request, model_admin):
        return (
                ('Python', 'Python'),
                ('Ruby', 'Ruby'),
                ('Java', 'Java')
    def queryset(self, request, queryset):
        if self.value()=='Python':
            return queryset.filter(title__icontains='Python')        
        if self.value()=='Ruby':
            return queryset.filter(title__icontains='Ruby')        
        if self.value()=='Java':
            return queryset.filter(title__icontains='Java')

class CourseAdmin(admin.ModelAdmin):
    inlines = [TextInline, QuizInline]

    list_filter = ['created_at', 'is_live', 'TopicListFilter']

admin.site.register(models.Course, CourseAdmin)

1 Answer

Julian Garcia
Julian Garcia
18,380 Points

Just need evaluate self.value() existence and filter title that contain it.

    def queryset(self, request, queryset):
        if self.value():
            return queryset.filter(title__contains=self.value())        

Hope it helps.