text: from django.contrib import admin
  from school.models import Student, Course, Registration
  
  class Students(admin.ModelAdmin):
    list_display = ('id', 'name', 'rg', 'cpf', 'birthday')
    list_display_links = ('id', 'name')
    search_fields = ('name',)
    list_per_page = 20
  
  class Courses(admin.ModelAdmin):
    list_display = ('id', 'code', 'description')
    list_display_links = ('id', 'code')
    search_fields = ('description',)
    list_per_page = 20
  
  class Registrations(admin.ModelAdmin):
    list_display = ('id', 'student', 'course', 'time_course')
    list_display_links = ('id', 'student', 'course')
    list_per_page = 20
  
  admin.site.register(Student, Students)
  admin.site.register(Course, Courses)
  admin.site.register(Registration, Registrations)
  