如何制作动态 RadioField

Question

我想制作一个包含多个选项的考试表格。 如何避免在表单类中手动写radioField，radioField重复N次

views.py

@app.route("/exams", methods=['GET', 'POST'])
def exams():
    radios = []
    if request.method == 'POST':
        #exam_answers_form = forms.(request.form)
        class NForm(forms.ExamAnswersForm):
            pass
        n = NForm()
        datos = Questions.query.add_columns('question').filter_by(modules_id=5).all()

        for name in datos:
            setattr(n, 'question', RadioField(name, choices=[('value','descriptions'),('value_two','whatever')]))
            n.question.append()
        x = n        
        return render_template('exams/exams_answers.html', form=x )
    return render_template('exams/exams.html')

forms.py

class ExamAnswersForm(Form):
    question = RadioField(choices=[()])

Answer 1

您可以编写这样的动态表单，假设您知道如何查询数据库以返回可以调整以下代码以适合您的格式的数据：

class ExamAnswersForm(Form):
    # get static data from database
    data = {'q_1': ('Is FEAR a good book?', (1, 'Yes'), (0, 'No')),
            'q_2': ('Is the Earth flat?', (0, 'Yes'), (1, 'No'))} 
    for label in data.keys():
        vars()[label] = RadioField(data[label][0], choices=[data[label][1], data[label][2]])

如果你想让它更动态，你可以创建一个返回初始化表单的方法：

def exam_answers_form(*args, **kwargs):
    # do something with *args and **kwargs to get dynamic data from database
    data = {'q_1': ('Is FEAR a good book?', (1, 'Yes'), (0, 'No')),
            'q_2': ('Is the Earth flat?', (0, 'Yes'), (1, 'No'))}
    class ExamAnswersForm(Form):
        pass
    for label in data.keys():
        setattr(ExamAnswersForm, label, RadioField(data[label][0], choices=[data[label][1], data[label][2]]))
    return ExamAnswersForm()