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我正在为自己编写一个待办事项列表应用程序,以及一种更好地熟悉Django及其所有错综复杂的方法。显示一个模板中的所有多对多关系
我想在列表模型和项目模型之间使用多对多的关系,以便某个项目一次可以出现在一个或多个列表中。
下面是相关代码:
models.py
from django.db import models
from django.contrib.auth.models import User
from datetime import datetime
def makeName():
return datetime.now()
# Create your models here.
class List(models.Model):
#owner = models.ForeignKey(User, on_delete=models.CASCADE)
list_create = models.DateTimeField(auto_now_add=True)
canView = models.ManyToManyField(User, blank=True, related_name='user')
listName = models.CharField(default=makeName, max_length=100)
class Item(models.Model):
list = models.ManyToManyField(List, blank=True)
field = models.TextField(max_length=100)
name = models.CharField(max_length=100)
date = models.DateTimeField('Date Made', auto_now_add=True)
completed = models.DateTimeField()
status = models.BooleanField(default=False)
的index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Home</title>
</head>
<body>
{% if lists %}
<table>
{% for list in lists %}
<!--{{ list }}
{{ list.item_set.all }}-->
{% for item in list.item_set.all %}
<tr>
<td>{{ item.field }}</td>
</tr>
<br>
{% endfor %}
{% endfor %}
</table>
{% else %}
Woops, you don't have any lists. Consider adding one.
{% endif %}
</body>
</html>
views.py
from django.http import HttpResponse
from django.contrib.auth.models import User
from django.contrib.auth.decorators import login_required
from .models import List, Item
from .forms import ItemForm
from django.shortcuts import render, get_object_or_404
# Create your views here.
def getLists(request):
lists = List.objects.filter(canView__user__id=request.user.id).values('listName')
temp2 = dict()
for list in lists:
temp = list.get('listName')
temp2[temp] = List.objects.get(listName=temp)
return temp2
@login_required
def index(request):
lists = dict()
lists = getLists(request)
list = lists['MainList']
print(list.item_set.get(pk=1))
print(lists['MainList'].item_set.count())
return render(request, 'index.html', {'lists': lists})
所以我的问题似乎在于在index.html中。我试图在每个列表中显示所有项目中的每一项。 This一个半相似度的问题基本上说,遍历list.item_set.all但是当我这样做时,我没有得到任何输出。我确实有项目填充数据库,当我从视图打印到控制台时,我看到了我期望的值。任何建议和/或指导将是惊人的。
我不知道为什么在迭代它时我没有停下来思考字典。谢谢您的帮助! – moovlin