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forms - 从选择字段接收“无”作为发布请求中的值

问题描述

我也是新来的 Flask。我收到“无”而不是来自选择字段的值作为响应。所以会很感激你的帮助！

这是我的布局：

<form method="post">
    <!-- select -->
    <div class="form-group mt-4">  
      <legend for="Sel">Choose criteria to sort</legend>
      <select class="custom-select" id="Sel" name="sel"> <!-- multiple -->       
        {% for field in form.select %}
          <option value="{{ field }}"></option>    
        {% endfor %}      
      </select>
    </div>
    <!-- submit -->
    {{form.submit(class="btn btn-primary")}}
  </form>

这就是我的观点：

from flask import Flask, render_template, request
from wtforms import Form, SelectField, SubmitField


app = Flask(__name__)


sel_choice = [ 
    ('sex', 'gender of the person interviewed '), 
    ('city', 'city where pool took place'),
    ('emotion', 'emotional characteristic of person`s comment'),
    ('month', 'month of poll'),
    ('poll_time', 'poll time')
]

class ChoiceForm(Form):
    select = SelectField(u'Criteria', choices=sel_choice)
    submit = SubmitField(label='apply')

@app.route('/', methods=['POST', 'GET'])
def sel():
    form =  ChoiceForm(request.form)
    if request.method == 'POST':
        print(form.select.data)
    return render_template('forms.html', form=form)

这就是我从服务器收到的：

标签： formsflask

解决方案

改变

print(form.select.data)

至

print(request.form.get('sel'))'

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