烧瓶引导quick\u表单缺少提交按钮

@atwalsh的答案很好,但你也可以将提交按钮放在课堂上,然后在模板中调用它:

class MyForm(FlaskForm):
    field1 = StringField('First field', [wtforms.validators.required()])
    field2 = StringField('Second field', [wtforms.validators.required()])
    field3 = StringField('Third field', [wtforms.validators.required()])
--> submit_button = SubmitField('Submit Form')

然后放入模板:

{{ wtf.quick_form(form, button_map={'submit_button': 'primary'}) }}
                            ^            ^

编辑: 您还需要导入SubmitField方法:

from wtforms import SubmitField
                                    

我相信您可以直接在后面添加输入字段 {{ wtf.quick_form(form) }}

<input class="btn btn-primary" type="submit" value="Login">

实例

{% import "bootstrap/wtf.html" as wtf %}
{% extends "layout.j2" %}

{% block content %}

<h1>My form</h1>
<form method="POST" action="/">
    {{ wtf.quick_form(form) }}
    <input class="btn btn-primary" type="submit" value="Login">
</form>
{% endblock content %}