Django从另一个模型获取模型

Question

我有两个模型，一个作者和一个文章。 每篇文章都需要引用其作者，以便我可以在模板中访问其值。 最有效的方法是什么？

class Author(models.Model):
    name = models.CharField(max_length=256)
    picture = models.CharField(max_length=256)

class Article(models.Model):
    title = models.CharField(max_length=256)
    author = #The Author model that wrote this article
    date = models.DateTimeField(default=datetime.now)
    body = models.TextField()

Answer 1

您需要为此使用Foreign Key概念。 以下是其实现：

class Author(models.Model):
    name = models.CharField(max_length=256)
    picture = models.CharField(max_length=256)

class Article(models.Model):
    title = models.CharField(max_length=256)
    author = models.ForeignKey(Author)
    date = models.DateTimeField(default=datetime.now)
    body = models.TextField()

保存时，您需要在views.py执行以下操作：

if form.is_valid():
    author = Author.objects.get(name="author name")
    form.save(author=author)

希望能帮助到你...

Answer 2

class Author(models.Model):
    name = models.CharField(max_length=256)
    picture = models.CharField(max_length=256)

class Article(models.Model):
    title = models.CharField(max_length=256)
    author = models.ForeignKey(Author, on_delete=models.CASCADE)
    date = models.DateTimeField(default=datetime.now)
    body = models.TextField()

>>> r1 = Author(name='John',picture='johnpicture')
>>> r1.save()

>>> r2 = Author(name='John',picture='paulpicture')
>>> r2.save()


>>> from datetime import date
>>> a = Article(title="Article1", body="This is a test",date=date(2017, 7, 27), author=r1)
>>> a.save()
>>> a.reporter