Question

我正在构建自己的自定义管理器以获取模型的翻译。想法是：

主要模式：

class BlogTranslationManager(models.Manager):        
    def language(self):
        lang = translation.get_language()
        return BlogTranslation.objects.filter(lang=lang)

class ArticleTranslationManager(models.Manager):
    def language(self):
        lang = translation.get_language()
        return ArticleTranslation.objects.filter(lang=lang)

class Blog(models.Model):
    created = models.DateTimeField()
    objects = models.Manager()
    translations = BlogTranslationManager()

    # PROBLEM HERE
    @property
    def articles(self):
        # here I need translations of all articles of this blog
        # I cannot do: 
        return self.blog_articles.translations.language('en')
        # because 'translations' Manager cannot be called on QuerySet
        # what can I do here? am I missing something in CustomManagers? 


class Article(models.Model):
    blog = models.ForeignKey(Blog, related_name="blog_articles")
    objects = models.Manager()
    translations = ArticleTranslationManager()

class BlogTranslation(models.Model):
    book = models.ForeignKey(Book, related_name="book_translations")
    field_name = models.CharField(max_length=10)
    lang = models.CharField(max_length=3)
    translation = models.TextField()

class ArticleTranslation(models.Model):
    article = models.ForeignKey(Article, related_name="article_translations")
    field_name = models.CharField(max_length=10)
    lang = models.CharField(max_length=3)
    translation = models.TextField()

在模板中，我希望能够致电：

{{ blog.articles }}

我在上面的代码中描述了问题，有关它的任何想法？任何帮助都非常感谢！

Answer 1

首先尝试使用Article.translations管理器，然后过滤生成的查询集。如果我正确理解你的模型，你需要这样的东西：

@property
def articles(self):
    return Article.translations.language('en').filter(article__blog=self)

Django自定义管理器 - 如何在QuerySet之前使用自定义管理器

1 个答案: