我有一个这样的结构: 1. Author 2. Book 3. AuthorType 4. AuthorBookType
一本书可以有多个作者,并且它可以在书中具有以下功能:“作者”、“共同作者”、“部分”、“助手”等:
class Book(models.Model):
title=models.CharField(max_length=100)
class Author(models.Model):
name=models.CharField(max_length=100)
books=models.ManyToManyField(Book, through='AuthorBookType')
class AuthorType(models.Model):
description=models.CharField(max_length=100)
class AuthorBookType(models.Model):
author=models.ForeignKey(Author, on_delete=models.CASCADE)
book=models.ForeignKey(Book, on_delete=models.CASCADE)
author_type=models.ForeignKey(AuthorType, on_delete=models.CASCADE)
我的数据库应该是这样的:
AUTHOR:
__________________________
| ID | NAME |
|========================|
| 1 | Jhon Doe. |
| 2 | Charles Albert |
| 3 | Matt Greg |
| 4 | Anne Engel |
--------------------------
BOOK:
__________________________
| ID | NAME |
|========================|
| 1 | Paradise City |
| 2 | Profaned Apple |
--------------------------
AUTHOR_TYPE:
__________________________
| ID | DESCRIPTION |
|========================|
| 1 | Author |
| 2 | Co-Author |
--------------------------
AUTHOR_BOOK_TYPE:
_____________________________________________
| ID | AUTHOR_ID | BOOK_ID | AUTHOR_TYPE_ID |
|===========================================|
| 1 | 1 | 1 | 1 |
| 2 | 2 | 1 | 2 |
| 3 | 3 | 1 | 2 |
| 4 | 3 | 2 | 1 |
| 5 | 4 | 2 | 2 |
---------------------------------------------
在我的 views.py 上我做了:
class AuthorsListView(ListView)
model = Author
context_object_name = 'authors'
template_name = 'core/authors_list.html'
然后在我的模板上:
{% for author in authors %}
{{ author.name }}<br>
{{ author.books }}
{% endfor %}
在文档中我没有发现这样的例子(只有没有连接表)。 https://docs.djangoproject.com/en/2.1/topics/db/examples/many_to_many/
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