如何将数据从同一个表单字段发送到两个不同的列？

Question

在我的项目中，我使用 Django 1.11.10 和 postgresql 作为数据库。当有人向 'order_id' 字段输入数据时，我想向它发送一个 item_barcode 列，无论它的前 2 个字符是字母。我该怎么做？

models.py

from django.db import models


class Customer(models.Model):


    item_barcode = models.TextField(max_length=50,unique=True,null=True)
    order_id = models.TextField(max_length=50,unique=True,null=True)
    full_name = models.TextField(max_length=50)
    company = models.TextField(max_length=60,blank=True)
    email = models.EmailField(max_length=40)
    phone_number = models.TextField(max_length=17)
    note = models.TextField(max_length=256,blank=True)


    def __str__(self):
        return self.order_id

forms.py

class CustomerForm(forms.ModelForm):

    class Meta:
        model = Customer
        fields = (
        'order_id','full_name','company','email',
        'phone_number','note')

views.py

def guaform(request):

    form = CustomerForm()

    if request.method == "POST":
        form = CustomerForm(request.POST)

        if form.is_valid():
            form.save(commit=True)
        
        else:

            HttpResponse("Error from invalid")

    return render(request,'customer_form.html',{'form':form})

*我的数据库列与 models.py

相同

Answer 1

您可以在验证表单后做一些工作。

if form.is_valid():
    #test to see if first two characters are letters
    first_two_characters = form.cleaned_data['order_id'][0:2]
    if first_two_characters.isAlpha():
        #get an instance of the object without saving to db
        form_uncommitted = form.save(commit=False)
        #set the item_barcode field and only then save to db
        form.uncommitted.item_barcode = form.cleaned_data['order_id'] #or what you want it to be
        form_uncommitted.order_id = None
        form_uncommitted.save
    else:
        #it's not a barcode so we can just save
        form.save()

如何将数据从同一个表单字段发送到两个不同的列？

How can i send data to two different column from the same form field?

python

django

postgresql

django-forms