Question

我正在使用django创建一个没有restframework的API。我有通过POST请求添加数据的问题。添加了所有数据，但外键是联系号码 ，它可以添加一个或多个联系号码

views.py

@method_decorator(csrf_exempt)
def phonebook_list(request):

    if request.method == 'GET':
        phonebooklist = PhoneBook.objects.all()
        serialized_data = [pb.to_json() for pb in phonebooklist]
        return JsonResponse(serialized_data, safe=False)
    elif request.method == 'POST':
            data= request.body.decode('utf8')
            data= json.loads(data)
            try:
                new_contact=PhoneBook(name=data["name"],
                address=data["address"],
                email=data["email"],
                note=data["note"])
                new_contact.save()

                new_contact_number=ContactNumber(
                contact_number=data["contact_number"], #No Contact Numbers Added # It should add one or more contact numbers
                number_id=data[PhoneBook.id] #It should add the contact number/s to the contact name added together
                )
                contact_number.save()

                return JsonResponse({"created": data}, safe= False)
            except:
                return JsonResponse({"error":"not valid data"}, safe=False)

models.py

class PhoneBook(models.Model):
    name = models.CharField(max_length=50)
    address = models.CharField(max_length=100, default='address')
    email = models.CharField(max_length=50, default='email')
    note = models.CharField(max_length=100, default='note')

    def to_json(self):

        contact_numbers = [c.contact_number
                     for c in self.contact_numbers.all()]
        return { 
            'name':            self.name, 
            'email':           self.email, 
            'address':         self.address,
            'note':            self.note,
            'contact_numbers': contact_numbers
         }

    def __str__(self):  
        return self.name

class ContactNumber(models.Model):  
    number = models.ForeignKey(PhoneBook, related_name="contact_numbers")
    contact_number= models.CharField(max_length=30)

    def __str__(self):  
        return self.contact_number

这是我添加一些数据后邮递员的结果 第一个是正确的数据，第二个是我输入的错误数据 Image result here

数据库表： contactnumber表： http://prntscr.com/jofv8h 电话簿表： http://prntscr.com/jofvt6

Answer 1

你最好学习如何在Django中保存ForeignKey，这个例子对你有帮助。 https://docs.djangoproject.com/en/2.0/topics/db/examples/many_to_one/

您可以了解django如何处理模型中的默认ID https://docs.djangoproject.com/en/2.0/topics/db/models/#automatic-primary-key-fields

在您的情况下，ForeignKey列为number，保存您刚刚创建的新合约对象，而不是保存ID

new_contact_number=ContactNumber(
                    contact_number=data["contact_number"],
                    number=new_contact)
new_contact_number.save()

Answer 2

试试这个答案，

@method_decorator(csrf_exempt)
def phonebook_list(request):
    #your code
    elif request.method == 'POST':
        data = request.body.decode('utf8')
        data = json.loads(data)
        try:
            new_contact = PhoneBook.objects.create(name=data["name"],address=data["address"],email=data["email"],note=data["note"])
            ContactNumber.objects.create(contact_number=data["contact_number"],number=new_contact)
            serialized_data = [new_contact.to_json()]
            return JsonResponse({"created": serialized_data}, safe=False)
        except:
            return JsonResponse({"error": "not valid data"}, safe=False)

的 UPDATE-1
如下更改您的观点，

def phonebook_list(request): if request.method == 'GET': phonebooklist = PhoneBook.objects.all() serialized_data = [pb.to_json() for pb in phonebooklist] return JsonResponse(serialized_data, safe=False) elif request.method == 'POST': data = request.body.decode('utf8') data = json.loads(data) try: new_contact = PhoneBook.objects.create(name=data["name"], address=data["address"], email=data["email"], note=data["note"]) for number in data["contact_numbers"]: ContactNumber.objects.create(contact_number=number, number=new_contact) serialized_data = [new_contact.to_json()] return JsonResponse({"created": serialized_data}, safe=False) except: return JsonResponse({"error": "not valid data"}, safe=False)

那么POST payload将是这样的，

{ "name": "George", "email": "zxc1@gmail.com", "address": "address-32", "note": "note-77", "contact_numbers": [ "11", "22", "33", "44" ] }

通过这种格式，您可以一次添加n个phone number个视图响应类似于

[ { "name": "Jerin", "email": "email1@gmail.com", "address": "address-1", "note": "note-1", "contact_numbers": [ "123654", "136285452" ] }, { "name": "Peter", "email": "email@gmail.com", "address": "address-2", "note": "note11", "contact_numbers": [ "789654" ] }, { "name": "George", "email": "zxc1@gmail.com", "address": "address-32", "note": "note-77", "contact_numbers": [ "11", "22", "33", "44" ] } ]

无法在Django中添加外键

2 个答案: