The django framework uses orm to implement bulk data updates

This article provides an example of how the django framework uses orm to batch update data.Share it for your reference, as follows:

I haven't used django to change my blog for a long time, and suddenly I feel uncomfortable.No way, that's why you play python, django in your spare time and work with java.Update the parentcode of a subclass at the same time when you write a category update with django, which is a good solution if you write your own native sql.However, since django is used, it is implemented with orm of django:

The easiest way:

MyModel.objects.filter(parentcode=ori_code).update(parentcode=new_code)

I forgot the most basic method.A complete example:

def updatecategory(request):
  comtype=request.POST.get('comtype','')
  catname=request.POST.get('categoryname','')
  myid=int(request.POST.get('id',''))
  parentid= request.POST.get('parentid','')
  catcode=request.POST.get('categorycode','')
  cat=models.Category.objects.get(autoid=myid)
  ori_parent_code = cat.catcode;
  if cat:
    cat.comtype = comtype
    cat.catname = catname
    cat.parentcode = parentid
    cat.catcode = catcode
    cat.save()
    if cat.parentcode == '-1':          models.Category.objects.filter(parentcode=ori_parent_code).update(parentcode=cat.catcode)

This will give you the right results, even if it's basic, it's easy to forget.Old age, you have to take care of it. Write a log.

I hope that the description in this paper will be helpful to everyone's Python program design based on the Django framework.