How to use the attribute : save() in views.py?-CodePudding

** When I use the attribute save() in views.py the page gets this error : NOT NULL constraint failed: pages_login.username

# views.py  :
    def about(request):
        username = request.POST.get("username")
        password = request.POST.get("password")
        data = Login(username=username,password=password)
        data.save()
        return render(request, 'pages/about.html')
# models.py :

    class Login(models.Model):
        username=models.CharField(max_length=40)
        password=models.CharField(max_length=40)

CodePudding user response：

Login(username=username,password=password)

This code will automatically insert the data to db. Please check your database. Or else you can save like this

data = Login()
data.username = username
data.password = password
data.save()

Always save password as hashed form for security

CodePudding user response：

is this the login view? no need to save you just have to redirect user after authenticating him

CodePudding user response：

Try this:

username = request.POST.get("username")
password = request.POST.get("password")

Login.objects.create(username=username, password=password)

This statement will create and save object in single step.

CodePudding user response：

I have changed the code without getting the error,and the problem was solved. instead of data.save() I put :

if request.POST.get("username") :
    data.save()

But I still don't know what is happening , do you know what is happening in the program ? I think that it can't save nothing so the page gets an error, but when I put (if ...) I order to save only when there is a username to get.