django

Question

我正在使用 __init__ 从视图传递的参数构建我的表单选择。当我执行 print(choices) 时，我的 choices 似乎构建正确，但表单未加载任何选项。甚至没有用于显示的小部件。我没有收到任何错误。我在其他有效的视图中使用了类似的代码，这就是为什么这个真的让我感到困惑的原因之一。

我确实看到 print("ok") 从未打印到 shell，而 print("else") 确实打印了

查看

def newobjtoassess(request, assess_pk):
    user = request.user
    assessment = Assessment.objects.get(pk=assess_pk)
    course_pk = assessment.course.pk
    context['assessment'] = assessment

    form = ObjToAssessmentForm(user=user, course_pk=course_pk)
    if request.method == 'POST':
        print("ok")
        form = ObjToAssessmentForm(request.POST, user=user, course_pk=course_pk)
        if form.is_valid():
            f = form.cleaned_data
            objective = f.get('objective')
            assessment.objectives.add(objective)
            assessment.save()
            return HttpResponseRedirect(reverse('gradebook:assessupdate', args=[assess_pk]))
        else:
            context['form'] = form
            return render(request, "gradebook/newobjtoassess.html", context)
    else:
        print("else")
        form = ObjToAssessmentForm(user=user, course_pk=course_pk)

    return render(request, "gradebook/newobjtoassess.html", context)

形式

class ObjToAssessmentForm(forms.Form):
    objective = forms.ChoiceField(label='Learning Objective', choices=[])

    def __init__(self, *args, **kwargs):
        user = kwargs.pop('user')
        my_course = kwargs.pop('course_pk')
        super(ObjToAssessmentForm, self).__init__(*args, **kwargs)
        choices=[(o.id, str(o)) for o in Objective.objects.filter(user=user, course=my_course)]
        print(choices)
        self.fields['objective'] = forms.ChoiceField(choices=choices)

模板

{% extends 'base-g.html' %} {% load static %} {% block content %}
{% load crispy_forms_tags %}
<div class="container">
    <div class="row">
        <div class="col">
          <p>Course:&nbsp;{{ assessment.course }}</p>
        </div>
      </div>
    <div class="row">
        <div class="col">
          <p>{{ assessment.assessment_name }}</p>
        </div>
    </div>
    <div class="row">
        <div class="col">
            <form method="post">{% csrf_token %}
                {{ form|crispy }}
                <input type = "submit" value="Update">
            </form>
        </div>
    </div>
</div>

{% endblock content %}

Answer 1

我搞混了 else 上的缩进。同样，我需要将表单传递给 else.

中的模板

# the last (2nd of the two) else in the view above
else:
    form = ObjToAssessmentForm(user=user, course_pk=course_pk)
    context['form'] = form
    return render(request, "gradebook/newobjtoassess.html", context)

视图可以稍微清理一下，但这可以解决问题。

django - init 中的选项未加载到表单中

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django - __init__ 中的选项未加载到表单中

django - choices from __init__ are not loading in the form

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django - init 中的选项未加载到表单中

django - choices from init are not loading in the form