如何使用wtforms列出BooleanField [英] How to make a list of BooleanField using wtforms

问题描述

我的目标是从数据库中查询用户列表，然后在每个人的姓名旁边添加一个BooleanField.可以检查每个人是否将其提交到表单.我试过使用SelectMultipleField，但它似乎只提交一个值，而FieldList确实没有示例，因此我不确定它们是否是我想要的.我是WTForms的新手，我不确定要使用哪种最佳选择.

示例:

解决方案

我将假设您正在使用Flask-SQLAlchemy来处理数据模型，因为您没有提到如何访问数据库./p>

定义如下的表格:

  class ExampleForm(Form):用户= QuerySelectMultipleField('用户'，query_factory = lambda:User.query.all()，widget = widgets.ListWidget(prefix_label = False)，option_widget = widgets.CheckboxInput())提交= SubmitField('提交') 

将为每个用户生成一个复选框列表，然后可以根据需要进行处理.呈现表单的模板可以是:

 < form action =" method ="POST">{{form.csrf_token}}{{form.user}}{{form.submit}}</form> 

并且路线代码将与以下内容类似:

  @ app.route('/'，Methods = ['post'，'get'])def home():形式= ExampleForm()如果form.validate_on_submit():返回"{}".format(form.user.data)返回render_template('example.html'，form = form) 

My goal is to query a list of users from a database then have a BooleanField next to each person's name. Each person can be checked whether they will be submitted to the form or not. I have tried using SelectMultipleField, but it seems to only submit one value, and FieldList really has no examples so I am not sure if they may be what I am looking for or not. I am new to WTForms and I am not sure what is the best option to use for what I am trying to do.

Example:

解决方案

I'm going to assume you're using Flask-SQLAlchemy to handle your data model because you make no mention of how you're accessing you database.

A form defined like:

class ExampleForm(Form):
    user = QuerySelectMultipleField(
        'User',
        query_factory=lambda: User.query.all(),
        widget=widgets.ListWidget(prefix_label=False),
        option_widget=widgets.CheckboxInput()
    )
    submit = SubmitField('Submit')

Will generate a list of checkboxes for each user, which then can be handled as required. The template to render the form could then just be:

<form action="" method="POST">
    {{ form.csrf_token }}
    {{ form.user }}
    {{ form.submit }}
</form>

And the route code would just be along the lines of:

@app.route('/', methods=['post','get'])
def home():
    form = ExampleForm()
    if form.validate_on_submit():
        return "{}".format(form.user.data)
    return render_template('example.html', form=form)

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