过滤以搜索数据库中的项目

Question

filters.py

import django_filters

from .models import *

class ProductFilter(django_filters.FilterSet):
    class Meta:
        model=Product
        fields=['name',]

产品 class models.py

class Product(models.Model):
    name = models.CharField(max_length=200)
    price = models.FloatField()
    digital = models.BooleanField(default=False,null=True, blank=True)
    image=models.ImageField(null=True, blank=True)
    description=models.CharField(max_length=400, default='SOME STRING', null=True)

models.py

中的 class 订单项

class OrderItem(models.Model):
    product = models.ForeignKey(Product, on_delete=models.SET_NULL, null=True)
    order = models.ForeignKey(Order, on_delete=models.SET_NULL, null=True)
    quantity = models.IntegerField(default=0, null=True, blank=True)
    date_added = models.DateTimeField(auto_now_add=True)

views.py

def store(request):
    if request.user.is_authenticated:
        customer = request.user.customer
        # Returns a tuple of (object, created), 
        # where object is the retrieved or created object and 
        # created is a boolean specifying whether a new object was created.
        order, created = Order.objects.get_or_create(customer=customer, complete=False)
        items = order.orderitem_set.all()
        cartItems=order.get_cart_items
    else:
        #Create empty cart for now for non-logged in user
        items = []
        order = {'get_cart_total':0, 'get_cart_items':0}
        cartItems=order['get_cart_items']

    products = Product.objects.all()
    myFilter=ProductFilter(request.GET, queryset=items)
    items=myFilter.qs
    context = {'products':products, 'cartItems': cartItems, 'myFilter': myFilter}
    return render(request, 'store/store.html', context)

模板文件（main.html）

<form class="form-inline mr-auto my-lg-0" method="get">
         <input class="form-control mr-sm-2" style="width:1000px; height:38px;" type="text" placeholder="Search for items" aria-label="Search">
           {{myFilter.form}}
         <button class="btn btn-outline-warning btn-rounded btn-sm my-0" style="width:80px; height:38px" type="submit">Search</button>
</form>

FieldError at / Cannot resolve keyword 'name' into field. Choices are: date_added, id, order, order_id, product, product_id, quantity

请求方法：GET

请求URL：http://127.0.0.1:8000/?name=Fifa+20

Django 版本：2.2

异常类型：FieldError

异常值：

无法将关键字 'name' 解析为字段。选项有：date_added、id、订单、order_id、产品、product_id、数量

异常位置：D:\ecom\venv\lib\site-packages\django\db\models\sql\query.py in names_to_path, line 1420

Python 可执行文件：D:\ecom\venv\Scripts\python.exe

Python版本：3.6.5

在我使用目录中的一种有效产品进行搜索后，它显示了上述错误。我从中推断出两件事。

1. name is a valid field in Product class in models.py
2. the other fields(date_added, id, order etc) mentioned in the image are fields of OrderItem class in models.py

但由于我要搜索产品目录，所以filters.py中的型号字段应设置为'name'下有效字段的产品。

我想解决这个问题，这样我就可以在我的商店中搜索商品了。我应该如何修改我的代码？

Answer 1

ProductFilter 指向产品型号。

但是在这里，您使用 items 作为 ProductFilter

的查询集

myFilter=ProductFilter(request.GET, queryset=items)

但项目包含 OrderItem 模型的查询集-

items = order.orderitem_set.all()

因此它显示了来自 OrderItem 模型而非产品模型的过滤器的可用选项列表。

过滤以搜索数据库中的项目

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