flask-wtf validate_on_submit（）總是返回

Question

我是flask-wtf的新手。我根據文檔做了，但validate_on_submit（）總是返回true，而不按照規則進行驗證。我錯過了什麼或做錯了什麼？

形式：

from flask_wtf import FlaskForm 
from wtforms import StringField, TextAreaField, BooleanField 
from wtforms.validators import DataRequired, Length, Optional 


class TemplateCreateForm(FlaskForm): 
    title = StringField([Length(min=4, max=45), DataRequired()]) 
    view_path = StringField([Length(min=1, max=45), DataRequired()]) 
    caption = TextAreaField([Length(min=5, max=250), Optional()]) 
    is_active = BooleanField([DataRequired()]) 

controller.py

@submodule.route('/create', methods=['GET', 'POST']) 
@logged_user_only 
def create(): 
    form = TemplateCreateForm(request.form) 
    if form.validate_on_submit(): 
     mongo.db.template.insert(
      { 
       'title': str(form.title.data), 
       'is_active': bool(form.is_active.data), 
       'caption': str(form.caption.data), 
       'view_path': str(form.view_path.data), 
       'user_id': str(session['user.user_id']), 
       'insert_timestamp': datetime.now() 
      } 
     ) 
    print form.errors 
    return render_template('create.html', form=form) 

view.html

<form action="{{%20url_for('template.create')%20}}" method="post"> 
    <h5 class="form-header">Template creation</h5>{{ form.hidden_tag() }} {{ form.csrf_token }} 
    <div class="form-group"> 
     <label for="">Title *</label> {{ form.title(class_='form-control') }} 
    </div> 
    <div class="form-group"> 
     <label for="">Caption </label> {{ form.caption(class_='form-control') }} 
    </div> 
    <div class="form-group"> 
     <label for="">View *</label> {{ form.view_path(class_='form-control') }} 
    </div> 
    <div class="form-check"> 
     <label class="form-check-label" for="">{{ form.is_active(class_='form-check-input') }} Active</label> 
    </div>{% for message in form.errors %} {{ message }} {% endfor %} 
    <div class="form-buttons-w"> 
     <button class="btn btn-primary">Submit</button> 
    </div> 
</form> 

Answer 1

您在class TemplateCreateForm有錯誤。字段應該在明年格式來描述：

field = StringField('label_here', list_of_validators_here) 

但在你的情況list_of_validators作品label。所以，只需將標籤添加到Form的所有字段。

title = StringField('title', [Length(min=4, max=45), DataRequired()]) 
view_path = StringField('view_path', [Length(min=1, max=45), DataRequired()]) 
...