This is a question about django ForeignKey.

The first question is what is the difference between the code ForeignKey below? One in the company says, "It's marked, but I don't know what's different. The result is It comes out the same, but I was curious because there were people who used it and people who didn't.

 class register(models.Model): #membership form
        user=models.OneToOneField(User,on_delete=models.CASCADE) #id/PW/Email
        company=models.ForeignKey(Company) #CompanyName

   class Register (models.Model): #MemberRegistrationForm
        user=models.OneToOneField(User,on_delete=models.CASCADE) #id/PW/Email
        company=models.ForeignKey("Company") #CompanyName

The second question is Save ForeignKey. This is from models.py.

class register(models.Model): #membership form
    user=models.OneToOneField(User,on_delete=models.CASCADE) #id/PW/Email
    company=models.ForeignKey(Company) #CompanyName
    office=models.CharField(max_length=30) #Branch and Department

     def __str__(self):
            return self.company+" "+self.office




class Apply(models.Model):
    register=models.ForeignKey(Register,null=True)
    serialnumber=models.CharField(max_length=30) #SerialNumber
    name=models.CharField(max_length=30) #RecipientName

forms.This is what the py says.

class ApplyForm(forms.ModelForm):
class Meta:
    model = Apply
    exclude = ['register']
    fields = ('serialnumber','name')
def save(self, commit=True, id=0):
    apply = super(ApplyForm, self).save(commit=False)
    if commit:
        apply.register=Register.objects.get(pk=id)
        apply.save()
    return apply

This is from views.py.

def apply(request): #application screen
    if request.method == 'POST':
       appfrom = ApplyForm(request.POST)
       if appfrom.is_valid():
         appsave=appfrom.save(commit=False,id=request.user.id)
         appsave.save()
         return HttpResponseRedirect('/lookup/')
    else:
         appfrom = ApplyForm()
    return render(request, 'as/apply.html', {'appfrom': appfrom})

The result image

The goal is to print company and office on that table register.

At the moment, I have to choose between those two, but what I want is a member's decision It was to make the department automatically selected, but isn't it just saved?

django

2022-09-22 11:31

1 Answers

(1) Looking at the models.ForeignKey's init code , you can put the model or model's name. I don't think both of them matter.

(2) Before Apply.save(), Apply.register = Register.objects.get(id)>. If you don't save it, it won't be reflected in the DB.

Additionally.

Apply = super(ApplyForm, self).save(commit=False)

is

apply = super(ApplyForm, self).save(commit=False)

I think it would be better if you changed it to . I'm already using Apply as a model name, so it's different.

Apply.register=Register.objects.get(pk=id)

Try to modify it like this. And id doesn't seem to be defined anywhere When you call save on views.py, please call it with form.save(id=request.user.id) and save should receive the id as follows.

def save(self, commit=True, id=0):



		
		
			

				

					
				

				
					2022-09-22 11:31

			
			If you have any answers or tips



		

	
		Popular Tags
	
	python x 4647
android x 1593
java x 1494
javascript x 1427
c x 927
c++ x 878
ruby-on-rails x 696
php x 692
python3 x 685
html x 656
	


	
		Popular Questions
	
	
	916 When building Fast API+Uvicorn environment with PyInstaller, console=False results in an error

	1022 In Java servlet, when SHA-256 sends WW-Authenticate header for digest authentication, the client does not return the result.

	613 GDB gets version error when attempting to debug with the Presense SDK (IDE)

	620 Uncaught (inpromise) Error on Electron: An object could not be cloned

	573 rails db:create error: Could not find mysql2-0.5.4 in any of the sources