Django的：FOREIGNKEY查詢

Question

我有models.py如下：

class Article(models.Model): 
    board = models.ForeignKey(Board) 
    subject = models.CharField("과목명", max_length=10) 
    ... 

class Question(models.Model): 
    user = models.ForeignKey(User) 
    article = models.ForeignKey(Article) 
    professor = models.CharField("출제교수", max_length=4) 
    ... 

Views.py：

def get_q_table(request): 
    context = { 
     "q_list" : Question.objects.all().order_by("number") 
    } 
    return render(request, "q_table.html", context) 

我想某種方式傳遞有關實例q_table.html，但無法找到一種方法來做到這一點。我應該像下面的（當然，這不完全正確，我一直在尋找外鍵查詢的單證，但我不出路「：如果我想出路

def get_q_table(request): 
context = { 
    "q_list" : Question.objects.all().order_by("number") 
    "article" : Question.objects.all().related_board 
} 
return render(request, "q_table.html", context) 

，然後下面的模板應該工作：

<div class="container"> 
    <div class="page-header"><h3>{{article.subject}} : {{article.year}}년 {{article.semester}}학기 {{article.quarter}}Q</h3></div> 
    <div> 
     <ul class="list-group" id="visitorbook"> 
     {% for question in questions %} 
      <li class="list-group-item">{{question.number}} : {{ question.question }} - {{ question.answer }} 
      </li> 
     {% endfor %} 
     </ul> 
    </div> 
</div> 

Answer 1

你想明確地選擇你的文章，然後選擇所有相關的問題，我猜。使用相關對象

article = Article.objects.get(id) 
questions = article.question_set.all() 
context = { 
    "article" : article 
    "questions" : questions 
} 

一般信息：

試試這個https://docs.djangoproject.com/en/1.8/topics/db/queries/#related-objects

當談到命令：https://docs.djangoproject.com/en/1.8/ref/models/options/#ordering

Answer 2

在模板中，認爲應該是：

{% for question in q_list %} 

Answer 3

你取aricle對象;

articles = Article.objects.all()

{% for article in articles %} 
<div class="container"> 
    <div class="page-header"><h3>{{article.subject}} : {{article.year}}년 {{article.semester}}학기 {{article.quarter}}Q</h3></div> 
    <div> 
    <ul class="list-group" id="visitorbook"> 
    {% for question in article.question_set.all %} 
     <li class="list-group-item">{{question.number}} : {{question.question }} - {{ question.answer }} 
     </li> 
     {% endfor %} 
     </ul> 
    </div> 
</div> 
{% endfor %} 

如果你想獲取只有一個文章，然後

;

articles = Article.objects.get(id=id)` 


<div class="container"> 
    <div class="page-header"><h3>{{article.subject}} : {{article.year}}년 {{article.semester}}학기 {{article.quarter}}Q</h3></div> 
    <div> 
    <ul class="list-group" id="visitorbook"> 
    {% for question in article.question_set.all %} 
     <li class="list-group-item">{{question.number}} : {{question.question }} - {{ question.answer }} 
     </li> 
     {% endfor %} 
     </ul> 
    </div> 
</div> 

Answer 4

提供的，該物品是爲所有問題一樣，你可以嘗試這樣的事情：

{% with article=questions.0.article %} 

<div class="container"> 
    <div class="page-header"><h3>{{article.subject}} : {{article.year}}년 {{article.semester}}학기 {{article.quarter}}Q</h3></div> 
    <!-- other stuff --> 
</div> 

{% endwith %} 

儘管您應該在問題列表爲空時以最適合您的方式處理案例。另外請注意，您不需要將「文章」添加到上下文中。