How to use the django.contrib.admin.site.register function in Django

'change': False,
            'has_delete_permission': False,
            'has_change_permission': True,
            'has_absolute_url': False,
            'opts': self.model._meta,
            'original': node,
            'save_as': False,
            'show_save': True,
            #'root_path': self.admin_site.root_path,
        }, context_instance=RequestContext(request))

admin.site.register(Node, NodeAdmin)
admin.site.register(Device, DeviceAdmin)
admin.site.register(Interface, InterfaceAdmin)
admin.site.register(Hna)
admin.site.register(Link, LinkAdmin)
admin.site.register(Statistic, StatisticAdmin)
admin.site.register(Contact, ContactAdmin)

# UserProfile

class UserProfileInline(admin.StackedInline):
	model = UserProfile

class UserProfileAdmin(UserAdmin):
    inlines = [UserProfileInline]

admin.site.unregister(User)
admin.site.register(User, UserProfileAdmin)

from app.models import *
from django.contrib import admin

admin.site.register(Address)
admin.site.register(Country)
admin.site.register(Option)
admin.site.register(Peering)

from migasfree.system.models import FaultDef
from migasfree.system.models import Query
from migasfree.system.models import Schedule
from migasfree.system.models import ScheduleDelay
from migasfree.system.models import DeviceManufacturer
from migasfree.system.models import DeviceType
from migasfree.system.models import DeviceModel
from migasfree.system.models import DeviceConnection
from migasfree.system.models import Device
from migasfree.system.models import Checking
from migasfree.system.models import AutoCheckError
from migasfree.system.models import Message
from migasfree.system.models import Update


admin.site.register(DeviceType)
admin.site.register(DeviceManufacturer)
admin.site.register(DeviceConnection)
admin.site.register(UserProfile)
admin.site.register(AutoCheckError)


def user_version(user):
    user_id=user.id
    try:
        version=UserProfile.objects.get(id=user_id).version.id
    except:
        version=None
    return version


class VersionAdmin(admin.ModelAdmin):

class MarkingPeriodAdmin(admin.ModelAdmin):
    inlines = [DaysOffInline]
    fieldsets = (
        ('', {
            'fields': ('active','name','shortname',('start_date','end_date'),
                       'grades_due','school_year','show_reports',
                       'school_days','weight'),
        },),
        ('Change active days', {
            'classes': ('grp-collapse grp-closed',),
            'fields': ('monday','tuesday','wednesday','thursday',
                       'friday','saturday','sunday',),
        },),
    )
admin.site.register(MarkingPeriod, MarkingPeriodAdmin)

admin.site.register(Period)

admin.site.register(Location)

admin.site.register(OmitCourseGPA)

admin.site.register(OmitYearGPA)

admin.site.register(Award)

field.widget.attrs['style'] = 'width: 30em;'
        return field

class OrganizationAdmin(AdminImageMixin, admin.ModelAdmin):
    save_on_top = True
    prepopulated_fields = {'slug': ('name',)}
    list_filter = ('is_live',)
    search_fields = ('name', 'description',)
    fieldsets = (
        ('', {'fields': (('name', 'slug'), ('is_live', 'show_in_lists'), 'email', 'twitter_username', 'github_username', ('github_repos_num', 'github_gists_num'), 'homepage', 'logo', 'description',)}),
        ('Location', {'fields': ('address', ('city', 'state',), 'country',)}),
    )
    inlines = [OrganizationLinkInline,]

admin.site.register(Person, PersonAdmin)
admin.site.register(Organization, OrganizationAdmin)

class ShortURLAdmin (GuardedModelAdmin):
    list_display = ('short', 'url', 'usage_count', 'short_url', 'created_at')

    def short(self, obj):
        return obj.to_base62()
    short.short_description = '短链标示'

    def short_url(self, obj):
        return settings.SITE_BASE_SHORTURL + obj.to_base62() + '/'
    short_url.short_description = '短链接'


admin.site.register(Area, AreaAdmin)
admin.site.register(Place, PlaceAdmin)
admin.site.register(Topic, TopicAdmin)
admin.site.register(Picture, PictureAdmin)
admin.site.register(TripTip, TripTipAdmin)
admin.site.register(OfflineMap, OfflineMapAdmin)
admin.site.register(APPInfo, APPInfoAdmin)
admin.site.register(APPReview, APPReviewAdmin)
admin.site.register(APPDevice, APPDeviceAdmin)
admin.site.register(Channel, APPChannelAdmin)
admin.site.register(ClickStat, ClickStatAdmin)
admin.site.register(ASAccount, ASAccountAdmin)
admin.site.register(ShortURL, ShortURLAdmin)

class FoodAdmin(admin.ModelAdmin):
    search_fields = ['meal']
    list_display = ['meal', 'price']


class AdvertisementAdmin(admin.ModelAdmin):
    list_display = ['id', 'start_date', 'end_date', 'image']


class MemberAdmin(admin.ModelAdmin):
    list_display = ['first_name', 'last_name']
    ordering = ['last_name']


admin.site.register(Food, FoodAdmin)
admin.site.register(Menu)
admin.site.register(Advertisement, AdvertisementAdmin)
admin.site.register(Member, MemberAdmin)

from django.contrib import admin

from badges.models import Badge, BadgeToLaureate

class BadgeAdmin(admin.ModelAdmin):
    fields = ('icon',)
    list_display = ('id','level')

admin.site.register(Badge, BadgeAdmin)
admin.site.register(BadgeToLaureate)

@admin.register(Order)
class OrderAdmin(admin.ModelAdmin):
    list_display = ('order_id', 'txn_id', 'amount', 'status')

    def has_change_permission(self, request, obj=None):
        return False

    def has_delete_permission(self, request, obj=None):
        return True

    def has_add_permission(self, request):
        return False


admin.site.register(Item)