Django 查询合并

Question

我在“models.py”文件中有两个模型类。 Signup & Notes

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

# Create your models here.
class Signup(models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE)
    contact = models.CharField(max_length=10, null=True)
    branch = models.CharField(max_length=30)
    campus = models.CharField(max_length=30)
    role = models.CharField(max_length=15)

    def __str__(self):
        return self.user.username


class Notes(models.Model):
    user = models.ForeignKey(User, on_delete=models.CASCADE)
    uploadingdate = models.CharField(max_length=30)
    branch = models.CharField(max_length=30)
    subject = models.CharField(max_length=30)
    topic = models.CharField(max_length=200)
    notesfile = models.FileField(null=True)
    filetype = models.CharField(max_length=30)
    description = models.CharField(max_length=300, null=True)
    status = models.CharField(max_length=15)


def __str__(self):
    return self.user.username + " " + self.status

在我的函数中，我使用 notes = Notes.objects.all() 和 users = User.objects.all() 来获取它们。

这里是函数

def indexnotes(request):

    notes = Notes.objects.all()
    users = User.objects.all()
    d = {'notes' : notes,'users' : users}
    return render(request,'indexnotes.html',d)

我正在使用 for 循环来显示数据表上的值。代码是这样的

<tbody >
        {% for i in notes %}
        <tr>
            <td>{{forloop.counter}}</td>
             <td>{{i.user.first_name}} {{i.user.last_name}}</td>
             <td>{{i.uploadingdate}}</td>
            <td>{{i.campus}}</td>
            <td>{{i.subject}}</td>
            <td><a href="{{i.notesfile.url}}" class="btn btn-success" download>Download</a></td>
            <td>{{i.filetype}}</td>
            <td>{{i.description}}</td>
            <td>{{i.status}}</td>
            <td><a href="{% url 'assign_status' i.id %}" class="btn btn-success" >Assign&nbsp;Status</a></td>
            <td><a href="{% url 'delete_notes' i.id %}" class="btn btn-danger" onclick="return confirm('Are you sure?')">Delete</a></td>
        </tr>
        {% endfor %}

</tbody>

现在问题是表的某些值来自 users 。由于 for 循环正在运行 notes .. 数据表不显示来自 users AKA Users 表的一些值。但我也想向他们展示。我试图合并 user 和 notes 但很遗憾没有成功。

我是 Django 新手。任何建议都会被采纳。 提前致谢。

Answer 1

在您的视图中进行以下更改

def indexnotes(request):
    notesid = []
    notesuploadingdate = []
    notescampus = []
    notessubject = []
    notesfileurl = []
    notesfiletype = []
    notesdesc = []
    notesstatus = []
    usernames = []
    notes = Notes.objects.all()
    for note in notes:
        notesid.append(note.id)
        notesuploadingdate.append(note.uploadingdate)
        notescampus.append(note.campus)
        notessubject.append(note.subject)
        notesfileurl.append(note.notesfile.url)
        notesfiletype.append(note.filetype)
        notesdesc.append(note.descriprion)
        notesstatus.append(note.status)
        user = User.objects.get(username=str(note.user))
        name = user.first_name + user.last_name
        usernames.append(name)
    pack = zip(notesid, notesuploadingdate, notescampus, notessubject, notesfileurl, notesfiletype, notesdesc, notesstatus, usernames)
    d = {'data': pack}
    return render(request,'indexnotes.html',d)

你的 html 看起来像

<tbody >
        {% for i in data %}
        <tr>
            <td>{{forloop.counter}}</td>
             <td>{{ i.8 }}</td>
             <td>{{ i.1 }}</td>
            <td>{{ i.2 }}</td>
            <td>{{ i.3 }}</td>
            <td><a href="{{ i.4 }}" class="btn btn-success" download>Download</a></td>
            <td>{{ i.5 }}</td>
            <td>{{ i.6 }}</td>
            <td>{{ i.7 }}</td>
            <td><a href="{% url 'assign_status' i.0 %}" class="btn btn-success" >Assign&nbsp;Status</a></td>
            <td><a href="{% url 'delete_notes' i.0 %}" class="btn btn-danger" onclick="return confirm('Are you sure?')">Delete</a></td>
        </tr>
        {% endfor %}

</tbody>