django中上传图片分页三级联动效果的实现代码

# 设置上传文件的保存目录
MEDIA_ROOT = os.path.join(BASE_DIR, 'static/media')

class PicTest(models.Model):
  """上传图片"""
  goods_pic = models.ImageField(upload_to='booktest') # 指定上传图片到media下面的booktest文件夹下

python manage.py makemigrations
python manage.py migrate

delete from django_migrations where id = xxx;

admin.site.register(models.PicTest)

FILE_UPLOAD_HANDLERS= (
"django.core.files.uploadhandler.MemoryFileUploadHandler",
"django.core.files.uploadhandler.TemporaryFileUploadHandler")

  
  
  



  {% csrf_token %}
  

  

from django.conf import settings # 上传图片时使用
def upload_pic(request):
  """返回上传图片文件的页面"""
  return render(request, 'booktest/upload_pic.html')


def upload_handle(request):
  """对上传的文件进行处理"""
  # 1.获取上传文件的处理对象
  pic = request.FILES['pic']
  pic_name = pic.name # 上传文件名
  # pic.chunk() # 上传的文件会以迭代器的形式，一部分一部分的保存在这里面
  # 2.创建一个文件
  save_path = '%s/booktest/%s' % (settings.MEDIA_ROOT, pic_name)
  # 3.将上传的文件写入到新创建的文件中
  with open(save_path, 'wb') as f:
    for content in pic.chunks():
      f.write(content)
  # 4.记录写入数据库
  models.PicTest.objects.create(goods_pic='booktest/%s' % pic_name)
  # 5.返回应答
  return HttpResponse(pic_name)

url(r'^upload_pic', views.upload_pic), # 返回上传图片文件的页面
url(r'^upload_handle', views.upload_handle), # 对上传的文件进行处理

url(r'^show_areas(?P\d*)', views.show_areas), # 分页

  
  
  




  {% for area in page %}
    
{{ area.atitle }}
  {% endfor %}


{% if page.has_previous %}
  <上一页
{% endif %}

{% for pindex in page.paginator.page_range %}
  {% if pindex == page.number %}
    {{ pindex }}
  {% else %}
    {{ pindex }}
  {% endif %}
{% endfor %}

{% if page.has_next %}
  下一页>
{% endif %}

from django.core.paginator import Paginator

def show_areas(request, pindex):
  """分页"""
  # 1.查询出所有省级地区的信息
  areas = models.AreaInfo.objects.filter(aParent__isnull=True)
  # 2.分页，每页显示10条
  pagintor = Paginator(areas, 10)
  # 3.获取第pindex页的内容
  if pindex == "":
    # 默认取第一页的内容
    pindex = 1
  else:
    pindex = int(pindex)
  # page是Page类的实例对象
  page = pagintor.page(pindex)

  # 4.使用模板
  return render(request, 'booktest/show_areas.html', {'page': page})

def areas(request):
  return render(request, 'booktest/areas.html')


def prov(request):
  """返回省级数据"""
  # 1.获取所有省级地区的信息
  areas = models.AreaInfo.objects.filter(aParent__isnull=True)
  # 2.变量areas拼接处json数据：atitle，id
  areas_list = []
  for area in areas:
    areas_list.append((area.id, area.atitle))
  return JsonResponse({'data': areas_list})


def city(request, pid):
  """获取pid对应地区的下级地区"""
  # 1.获取pid对应地区的下级地区
  # area = models.AreaInfo.objects.filter(id=pid)
  # areas = area.areainfo_set.all()
  areas = models.AreaInfo.objects.filter(aParent__id=pid)
  # 2.变量areas拼接处json数据：atitle，id
  areas_list = []
  for area in areas:
    areas_list.append((area.id, area.atitle))
  return JsonResponse({'data': areas_list})

url(r'^prov', views.prov), # 返回省级数据
url(r'^city(\d+)', views.city), # 返回市级数据
url(r'^dis(\d+)', views.city), # 返回县级数据

  
  
  
  
  



  ---请选择省---



  ---请选择市---


  ---请选择县---