from django.contrib import admin
from quiz.models import Course


@admin.register(Course)
class CourseAdmin(admin.ModelAdmin):
    """Admin interface for Courses"""
    list_display = ['id', 'name', 'code', 'exam_count', 'created_at']
    search_fields = ['name', 'code']
    readonly_fields = ['created_at']

    def exam_count(self, obj):
        """Show number of exams"""
        return obj.exams.count()
    exam_count.short_description = '# Exams'