类型为“Product”的输入无效。首先转换为字节、字符串、整型或浮点型

Question

我使用的是redis 6.2版

这是我正在研究的观点：

elif request.method == 'POST':
    user_key = request.user
    bid_price = request.POST.get('bid')
    retrieve_product = request.POST.get('product.id')
    product_key = Product.objects.get(id=retrieve_product)
    minimum_price = product_key.base_price
    if float(bid_price) >= minimum_price:
        if redis_instance.hexists(product_key, "highest_bid"):
            hb_value = redis_instance.hget(product_key, "highest_bid")
        else:
            redis_instance.hset(product_key, "highest_bid", bid_price)
            hb_value = bid_price
        if bid_price > hb_value:
            redis_instance.hset(product_key, user_key, bid_price)  
            redis_instance.hset(product_key, "highest_bid", bid_price)
            messages.info('Your bid was successfully processed')
            return HttpResponse('successfully uploaded')
        else:
            return HttpResponse('Your bid is lower than current highest bid')

    else:
        return HttpResponse('Your bid is lower than minimum price')

本无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无无“好的，好的”

相反，这是模型：

class Product(models.Model):
    name = models.CharField(max_length=200, null=True)
    base_price = models.DecimalField(max_digits=5, decimal_places=2, null=True, blank=True)
    digital = models.BooleanField(default=False, null=True, blank=True)
    start_date = models.DateTimeField(default=timezone.now)
    end_date = models.DateTimeField(default=one_day_hence)
    bidding_finished = models.BooleanField(default=False)

    def __str__(self):
        return self.name

错误回溯：

Traceback (most recent call last):   File
"C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\wsgiref\handlers.py",
line 138, in run
    self.finish_response()   File "C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\wsgiref\handlers.py",
line 196, in finish_response
    self.close()   File "C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\site-packages\django\core\servers\basehttp.py",
line 114, in close
    super().close()   File "C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\wsgiref\simple_server.py",
line 38, in close
    SimpleHandler.close(self)   File "C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\wsgiref\handlers.py",
line 335, in close
    self.result.close()   File "C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\site-packages\django\http\response.py",
line 253, in close
    signals.request_finished.send(sender=self._handler_class)   File "C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\site-packages\django\dispatch\dispatcher.py",
line 173, in send
    return [   File "C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\site-packages\django\dispatch\dispatcher.py",
line 174, in <listcomp>
    (receiver, receiver(signal=self, sender=sender, **named))   File "C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\site-packages\django\db\__init__.py",
line 57, in close_old_connections
    conn.close_if_unusable_or_obsolete()   File "C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\site-packages\django\db\backends\base\base.py",
line 525, in close_if_unusable_or_obsolete
    self.close()   File "C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\site-packages\django\utils\asyncio.py",
line 26, in inner
    return func(*args, **kwargs)   File "C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\site-packages\django\db\backends\sqlite3\base.py",
line 261, in close
    if not self.is_in_memory_db():   File "C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\site-packages\django\db\backends\sqlite3\base.py",
line 380, in is_in_memory_db
    return self.creation.is_in_memory_db(self.settings_dict['NAME'])   File
"C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\site-packages\django\db\backends\sqlite3\creation.py",
line 12, in is_in_memory_db
    return database_name == ':memory:' or 'mode=memory' in database_name TypeError: argument of type 'WindowsPath' is not
iterable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):   File
"C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\socketserver.py",
line 650, in process_request_thread
    self.finish_request(request, client_address)   File "C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\socketserver.py",
line 360, in finish_request
    self.RequestHandlerClass(request, client_address, self)   File "C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\socketserver.py",
line 720, in __init__
    self.handle()   File "C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\site-packages\django\core\servers\basehttp.py",
line 174, in handle
    self.handle_one_request()   File "C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\site-packages\django\core\servers\basehttp.py",
line 197, in handle_one_request
    handler.run(self.server.get_app())   File "C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\wsgiref\handlers.py",
line 145, in run
    self.handle_error()   File "C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\site-packages\django\core\servers\basehttp.py",
line 119, in handle_error
    super().handle_error()   File "C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\wsgiref\handlers.py",
line 382, in handle_error
    self.finish_response()   File "C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\wsgiref\handlers.py",
line 184, in finish_response
    self.write(data)   File "C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\wsgiref\handlers.py",
line 288, in write
    self.send_headers()   File "C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\wsgiref\handlers.py",
line 345, in send_headers
    if not self.origin_server or self.client_is_modern():   File "C:\Users\alber\AppData\Local\Programs\Python\Python38\lib\wsgiref\handlers.py",
line 358, in client_is_modern
    return self.environ['SERVER_PROTOCOL'].upper() != 'HTTP/0.9' TypeError: 'NoneType' object is not subscriptable

Answer 1

根据文章标题中的错误消息（而不是文章中的回溯），您的问题是使用包含Product模型对象的product_key变量调用Redis.hexists()、Redis.hget()和Redis.hset()方法

相反，使用Redis键的字符串值，例如str(product_key.id)

您还需要为user_key执行类似的操作