问题
I am using django 1.0 and I have created my models using the example in the Django book. I am able to perform the basic function of adding data; now I need a way of retrieving that data, loading it into a form (change_form?! or something), EDIT it and save it back to the DB. Secondly how do I DELETE the data that's in the DB? i.e. search, select and then delete!
Please show me an example of the code I need to write on my view.py
and urls.py
for perform this task.
回答1:
Say you have a model Employee. To edit an entry with primary key emp_id you do:
emp = Employee.objects.get(pk = emp_id)
emp.name = 'Somename'
emp.save()
to delete it just do:
emp.delete()
so a full view would be:
def update(request, id):
emp = Employee.objects.get(pk = id)
#you can do this for as many fields as you like
#here I asume you had a form with input like <input type="text" name="name"/>
#so it's basically like that for all form fields
emp.name = request.POST.get('name')
emp.save()
return HttpResponse('updated')
def delete(request, id):
emp = Employee.objects.get(pk = id)
emp.delete()
return HttpResponse('deleted')
In urls.py you'd need two entries like this:
(r'^delete/(\d+)/$','myproject.myapp.views.delete'),
(r'^update/(\d+)/$','myproject.myapp.views.update'),
I suggest you take a look at the docs
回答2:
To do either of these you need to use something called queries.
check link below for really great documentation on that! (https://docs.djangoproject.com/en/2.2/topics/db/queries/)
To Delete Data:
b = ModelName.objects.get(id = 1)
b.delete()
This will delete the Object of the model w/ an ID of 1
To edit Data:
b = ModelName.objects.get(id = 1)
b.name = 'Henry'
b.save()
This will change the name of the Object of the model w/ an ID of 1 to be Henry
回答3:
Read the following: The Django admin site. Then revise your question with specific details.
来源:https://stackoverflow.com/questions/311188/how-do-i-edit-and-delete-data-in-django