Python 从一个模型查询数据，从另一个模型筛选数据

我希望显示一个表中的值，但根据另一个表中的值筛选这些值

例如：我想显示data/models.py中的值，这些值由CustomUser表（accounts/models.py）中的customer_标记过滤。 这些是相关的表，但我无法找出正确的语法来过滤此视图。 有什么想法吗？或者这在我当前的模式下是不可能的

数据/视图.py

from django.views.generic import ListView, DetailView
from django.views.generic.edit import UpdateView, DeleteView, CreateView
from django.urls import reverse_lazy
from .models import Data
from django.contrib.auth.mixins import LoginRequiredMixin
from rest_framework import generics
from .models import Data
from accounts.models import CustomUser
from .serializers import DataSerializer
from .permissions import IsAuthorOrReadOnly

class DataListView(LoginRequiredMixin,ListView):
    queryset = Data.objects.all()
    context = {
        "object_list": queryset
    }
    template_name = 'data_list.html'
    login_url = 'login'

from django.db import models
from django.contrib.auth.models import AbstractUser

class CustomUser(AbstractUser):
    customer_Tag = models.CharField(max_length=50,)
    isAdmin = models.BooleanField(default = False,)
    notifications = models.BooleanField(default = True,)
    deviceSerial= models.CharField(max_length=50,)
    machineName= models.CharField(max_length=50,default="ESP1",)
    machineDescription = models.CharField(max_length=200,)

class Customer(models.Model):
    customerTag= models.CharField(max_length=50,) 
    customerName = models.CharField(max_length=50,)
    mainContact = models.CharField(max_length=100,default='',)
    Address = models.CharField(max_length=100,default='',)
    city = models.CharField(max_length=100,default='',)
    website = models.URLField(max_length=100,default='',)
    phone = models.IntegerField(default=0,)

    def __str__(self):
        return self.customerName

from django.db import models
from django.conf import settings
from django.contrib.auth import get_user_model


class Data(models.Model):
    author = models.ForeignKey(get_user_model(),on_delete=models.CASCADE,)
    tempData= models.CharField(max_length=50,blank=True,)
    humidData= models.CharField(max_length=50,blank=True,)


def __str__(self):
    return str(self.author)

客户/型号.py

from django.views.generic import ListView, DetailView
from django.views.generic.edit import UpdateView, DeleteView, CreateView
from django.urls import reverse_lazy
from .models import Data
from django.contrib.auth.mixins import LoginRequiredMixin
from rest_framework import generics
from .models import Data
from accounts.models import CustomUser
from .serializers import DataSerializer
from .permissions import IsAuthorOrReadOnly

class DataListView(LoginRequiredMixin,ListView):
    queryset = Data.objects.all()
    context = {
        "object_list": queryset
    }
    template_name = 'data_list.html'
    login_url = 'login'

from django.db import models
from django.contrib.auth.models import AbstractUser

class CustomUser(AbstractUser):
    customer_Tag = models.CharField(max_length=50,)
    isAdmin = models.BooleanField(default = False,)
    notifications = models.BooleanField(default = True,)
    deviceSerial= models.CharField(max_length=50,)
    machineName= models.CharField(max_length=50,default="ESP1",)
    machineDescription = models.CharField(max_length=200,)

class Customer(models.Model):
    customerTag= models.CharField(max_length=50,) 
    customerName = models.CharField(max_length=50,)
    mainContact = models.CharField(max_length=100,default='',)
    Address = models.CharField(max_length=100,default='',)
    city = models.CharField(max_length=100,default='',)
    website = models.URLField(max_length=100,default='',)
    phone = models.IntegerField(default=0,)

    def __str__(self):
        return self.customerName

from django.db import models
from django.conf import settings
from django.contrib.auth import get_user_model


class Data(models.Model):
    author = models.ForeignKey(get_user_model(),on_delete=models.CASCADE,)
    tempData= models.CharField(max_length=50,blank=True,)
    humidData= models.CharField(max_length=50,blank=True,)


def __str__(self):
    return str(self.author)

数据/模型.py

from django.views.generic import ListView, DetailView
from django.views.generic.edit import UpdateView, DeleteView, CreateView
from django.urls import reverse_lazy
from .models import Data
from django.contrib.auth.mixins import LoginRequiredMixin
from rest_framework import generics
from .models import Data
from accounts.models import CustomUser
from .serializers import DataSerializer
from .permissions import IsAuthorOrReadOnly

class DataListView(LoginRequiredMixin,ListView):
    queryset = Data.objects.all()
    context = {
        "object_list": queryset
    }
    template_name = 'data_list.html'
    login_url = 'login'

from django.db import models
from django.contrib.auth.models import AbstractUser

class CustomUser(AbstractUser):
    customer_Tag = models.CharField(max_length=50,)
    isAdmin = models.BooleanField(default = False,)
    notifications = models.BooleanField(default = True,)
    deviceSerial= models.CharField(max_length=50,)
    machineName= models.CharField(max_length=50,default="ESP1",)
    machineDescription = models.CharField(max_length=200,)

class Customer(models.Model):
    customerTag= models.CharField(max_length=50,) 
    customerName = models.CharField(max_length=50,)
    mainContact = models.CharField(max_length=100,default='',)
    Address = models.CharField(max_length=100,default='',)
    city = models.CharField(max_length=100,default='',)
    website = models.URLField(max_length=100,default='',)
    phone = models.IntegerField(default=0,)

    def __str__(self):
        return self.customerName

from django.db import models
from django.conf import settings
from django.contrib.auth import get_user_model


class Data(models.Model):
    author = models.ForeignKey(get_user_model(),on_delete=models.CASCADE,)
    tempData= models.CharField(max_length=50,blank=True,)
    humidData= models.CharField(max_length=50,blank=True,)


def __str__(self):
    return str(self.author)

---

如果我理解正确的话，我想您是在寻找筛选器查询的key__字段参数。所以在你的情况下，会是这样的

Data.objects.filter(author__customer_tag='tag-you-are-looking-for')   # double underscores after author

---

希望这能回答你的问题

如果我理解正确，我想您是在寻找筛选器查询的key__字段参数。所以在你的情况下，会是这样的

Data.objects.filter(author__customer_tag='tag-you-are-looking-for')   # double underscores after author

希望这能回答你的问题

都在文档中：

相关模型的字段在过滤器中使用双下划线进行查询

在您的情况下，您需要重写

DataListView

类的

get\u queryset

方法以返回过滤后的queryset：

class DataListView(LoginRequiredMixin,ListView):
...
def get_queryset(self):
    return self.queryset.filter(author__customerTag=self.request.user.customerTag)

都在文档中：

相关模型的字段在过滤器中使用双下划线进行查询

在您的情况下，您需要重写

DataListView

类的

get\u queryset

方法以返回过滤后的queryset：

class DataListView(LoginRequiredMixin,ListView):
...
def get_queryset(self):
    return self.queryset.filter(author__customerTag=self.request.user.customerTag)

---

谢谢你，我做到了！我刚刚将最后一行改为：return Data.objects.filter（author\u customer\u Tag=self.request.user.customer\u Tag），非常感谢您这么做！我刚刚将最后一行更改为：return Data.objects.filter（author\u customer\u Tag=self.request.user.customer\u Tag）