如何制作动态RadioField

Question

我想制作具有多种选择的考试表格。 如何避免在表单类中手动编写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某种格式返回数据，则可以调整以下代码以使其适合您：

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]])

如果要使其更具动态性，可以创建一个返回初始化形式的方法：

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()