Question

我有以下型号：

 class Student(models.Model):
    name = models.CharField(max_length=50)
    surname = models.CharField(max_length=50)
    city = models.CharField(max_length=50)
    country = models.CharField(max_length=50)
    skypeid = models.CharField(max_length=100)
    email = models.EmailField(max_length=75)
    youtubechannel = models.URLField(max_length=200)

    def __unicode__(self):
            return self.surname

class LanguageKnowledge(models.Model):

    LOW = 'LOW'
    MEDIUM = 'MED'
    ADVANCED = 'ADV'
    EXPERT = 'EXP'

    LANGUAGE_KNOWLEDGE_CHOICES =(
    (LOW, 'LOW'),
    (MEDIUM, 'Medium'),
    (ADVANCED,'Advanced'),
    (EXPERT, 'Expert'),
    )


    student = models.ForeignKey(Student)
    language = models.ForeignKey(Language)
    grammar = models.CharField(max_length=3, choices=LANGUAGE_KNOWLEDGE_CHOICES)
    reading = models.CharField(max_length=3, choices=LANGUAGE_KNOWLEDGE_CHOICES)
    speaking = models.CharField(max_length=3, choices=LANGUAGE_KNOWLEDGE_CHOICES)
    writing = models.CharField(max_length=3, choices=LANGUAGE_KNOWLEDGE_CHOICES)

    def __unicode__(self):
            return u'%s : %s' % (self.student, self.language)

然后是以下视图

def student(request, student_id):
    try:
        studentdetails = Student.objects.get(pk=student_id)
        languageknowledge_list = LanguageKnowledge.objects.filter(student__id__exact=student_id)
    except Student.DoesNotExist:
        raise Http404
    return render(request, 'broker/student.html',
                  {'studentdetails': studentdetails, 
                   'languageknowledge_list': languageknowledge_list})

但是，以下模板未列出languageknowledge_list中存在的不同语言。作为一个更一般的问题，我如何通过模板列出涉及一对多关系的查询集（例如，说几种语言的学生）？

{% block content %}
    <ul>
        {% for languageknowlege in languageknowledge_list %}
            <li>{{ languageknowledge.language }}, h2 got it,</li>
        {% endfor %}
    </ul>
{% endblock %}

Answer 1

您在languageknowledge变量的模板中拼写错误。

更改此行：

{% for languageknowlege in languageknowledge_list %}
    <li>{{ languageknowledge.language }}, h2 got it,</li>

要：

{% for languageknowledge in languageknowledge_list %}
    <li>{{ languageknowledge.language }}, h2 got it,</li>

请注意，最好使用至少具有拼写检查功能的好ide，并在组合时将变量名称与_分开，例如使用language_knowledge代替{{ 1}}帮助拼写检查器更好地检测拼写错误。

在django模板系统中列出查询集

1 个答案: