Python 在单个JSON中包装多个值并存储在model-Django中

我想在单个JSON字段中存储多个输入

这是顺序表，有一个“attribute_field”，我想在这个字段中存储属性 作为JSON

型号.py

class Order(models.Model):
    order_id = models.AutoField("Order ID", primary_key=True)
    user_id = models.ForeignKey(User, on_delete=models.CASCADE, null=False, verbose_name="Customer ID")
    prod_id = models.ForeignKey(Product, on_delete=models.CASCADE, null=False, verbose_name="Product ID")
    quantity = models.ImageField('Product Quantity', max_length=10, default=500)
    attribute_value = models.CharField("Item Details JSON", max_length=2000, null=False)
    order_price = models.DecimalField(max_digits=8, decimal_places=2, default=0000.00)

def order(request, id):
    if request.method == 'POST':
        customer_id = request.user.user_id
        product_id = id
        try:
            size = request.POST['size']
        except MultiValueDictKeyError:
            pass

        try:
            Colour = request.POST['Color']
        except MultiValueDictKeyError:
            pass

        try:
            Paper_Choice = request.POST['PaperChoice']
        except MultiValueDictKeyError:
            pass

    return render(request, 'user/order.html')

def order(request, id):
    if request.method == 'POST':
        customer = request.user
        product_id = id
        try:
            size = request.POST['size']
        except MultiValueDictKeyError:
            pass

        try:
            Colour = request.POST['Color']
        except MultiValueDictKeyError:
            pass

        try:
            Paper_Choice = request.POST['PaperChoice']
        except MultiValueDictKeyError:
            pass
        order = Order.objects.filter(user=customer, prod=product_id).first()
        value = dict(size=size, Colour=Colour, Paper_Choice=Paper_Choice)
        order.attribute_value = json.dumps(value)
        order.save()

    return render(request, 'user/order.html', {'order': order})

视图.py

class Order(models.Model):
    order_id = models.AutoField("Order ID", primary_key=True)
    user_id = models.ForeignKey(User, on_delete=models.CASCADE, null=False, verbose_name="Customer ID")
    prod_id = models.ForeignKey(Product, on_delete=models.CASCADE, null=False, verbose_name="Product ID")
    quantity = models.ImageField('Product Quantity', max_length=10, default=500)
    attribute_value = models.CharField("Item Details JSON", max_length=2000, null=False)
    order_price = models.DecimalField(max_digits=8, decimal_places=2, default=0000.00)

def order(request, id):
    if request.method == 'POST':
        customer_id = request.user.user_id
        product_id = id
        try:
            size = request.POST['size']
        except MultiValueDictKeyError:
            pass

        try:
            Colour = request.POST['Color']
        except MultiValueDictKeyError:
            pass

        try:
            Paper_Choice = request.POST['PaperChoice']
        except MultiValueDictKeyError:
            pass

    return render(request, 'user/order.html')

def order(request, id):
    if request.method == 'POST':
        customer = request.user
        product_id = id
        try:
            size = request.POST['size']
        except MultiValueDictKeyError:
            pass

        try:
            Colour = request.POST['Color']
        except MultiValueDictKeyError:
            pass

        try:
            Paper_Choice = request.POST['PaperChoice']
        except MultiValueDictKeyError:
            pass
        order = Order.objects.filter(user=customer, prod=product_id).first()
        value = dict(size=size, Colour=Colour, Paper_Choice=Paper_Choice)
        order.attribute_value = json.dumps(value)
        order.save()

    return render(request, 'user/order.html', {'order': order})

这里我没有做表单保存方法，但让我解释一下我想做什么

---

我想包装尺寸、颜色、纸张选择为单一JSON，并将其存储在模型的Attribute_values字段中，但不知道如何做，请您向我解释。

如果您的Django版本>=3.1，您可以使用

JSONField

，否则使用

TextField

。 大概是这样的：

class Order(models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE, verbose_name="Customer")
    prod = models.ForeignKey(Product, on_delete=models.CASCADE, verbose_name="Product")
    quantity = models.ImageField('Product Quantity', max_length=10, default=500)
    attribute_value = models.TextField("Item Details JSON")
    price = models.DecimalField(max_digits=8, decimal_places=2, default=0)

视图.py

class Order(models.Model):
    order_id = models.AutoField("Order ID", primary_key=True)
    user_id = models.ForeignKey(User, on_delete=models.CASCADE, null=False, verbose_name="Customer ID")
    prod_id = models.ForeignKey(Product, on_delete=models.CASCADE, null=False, verbose_name="Product ID")
    quantity = models.ImageField('Product Quantity', max_length=10, default=500)
    attribute_value = models.CharField("Item Details JSON", max_length=2000, null=False)
    order_price = models.DecimalField(max_digits=8, decimal_places=2, default=0000.00)

def order(request, id):
    if request.method == 'POST':
        customer_id = request.user.user_id
        product_id = id
        try:
            size = request.POST['size']
        except MultiValueDictKeyError:
            pass

        try:
            Colour = request.POST['Color']
        except MultiValueDictKeyError:
            pass

        try:
            Paper_Choice = request.POST['PaperChoice']
        except MultiValueDictKeyError:
            pass

    return render(request, 'user/order.html')

def order(request, id):
    if request.method == 'POST':
        customer = request.user
        product_id = id
        try:
            size = request.POST['size']
        except MultiValueDictKeyError:
            pass

        try:
            Colour = request.POST['Color']
        except MultiValueDictKeyError:
            pass

        try:
            Paper_Choice = request.POST['PaperChoice']
        except MultiValueDictKeyError:
            pass
        order = Order.objects.filter(user=customer, prod=product_id).first()
        value = dict(size=size, Colour=Colour, Paper_Choice=Paper_Choice)
        order.attribute_value = json.dumps(value)
        order.save()

    return render(request, 'user/order.html', {'order': order})

---

看看这是否解决了您的问题-谢谢它工作正常，但我忘了提到一件事，如果用户只选择了选择字段，那么值应该添加到属性值中，否则不会，所以我想我必须首先创建一个字典，然后使用append方法，如果选择了大小或大小，则尝试在其中存储值不用了，谢谢。它也在按我的要求工作。对于我提出的问题，它是有效的。