2017-09-04 79 views
0

我正在使用Flask和WTForm來製作一個網絡應用程序,到目前爲止我的其他兩個字段驗證正常,但SelectField拋出錯誤'請選擇一個寵物'。正如我自己指定的那樣,即它認爲它沒有收到有效的輸入。 SelectField.choices匹配到呈現爲HTML的選項,所以我做錯了什麼?Flask針對SelectField的WTForm驗證失敗...爲什麼?

app.py

from flask_wtf import Form 
from flask_wtf.csrf import CSRFProtect 
from wtforms import IntegerField, StringField, SelectField, validators, 
ValidationError 
from flask import Flask, request, flash, render_template 

app = Flask(__name__) 
app.secret_key = 'xxxxxxxxxxxx' 
csrf = CSRFProtect(app) 


pChoices = [('-1', '-----'), 
      ('0', 'Cat'), 
      ('1', 'Dog'), 
      ('2', 'Parrot'), 
      ('3', 'Hamster')] 


class paymentForm(Form): 
    productF = SelectField('productF', [validators.input_required("Please choose a pet.")], choices=[pChoices], coerce=int) 
    buyer_id = StringField('buyer', [validators.input_required("Please enter your name.")]) 
    paid = DecimalField('paid', [validators.input_required("please enter payment amount")]) 


@app.route('/', methods=['POST', 'GET']) 
def index(): 
    form = paymentForm(request.form, csrf_enabled=True) 
    if form.validate_on_submit(): 
     flash('Order Placed Successfully', 'success') 
     data = form.data 
     record_order(data) 
     print(data['price']) 
     return render_template('confirmation.jinja', 
           pets=PETS, 
           title='Confirmation Page', 
           form=form, error=form.errors, 
           ** context) 
    elif not form.validate_on_submit: 
     flash('Submission error, please check the form', 'success') 
    return render_template('index.jinja', 
           title='Order Form', 
           form=form, 
           error=form.errors, 
           **context) 

if __name__ == '__main__': 
    app.run(debug=True, use_reloader=True) 

index.jinja

{% extends 'base.jinja' %} 

{% block main %} 
    <form method="post"> 
    <div class="form-group row"> 
     <label for="product" class="col-sm-2 form-control-label">Pet:</label> 
     <div class="col-sm-8"> 
     <select id="productF" class="form-control" name="pet" onchange="Update()"> 
      <option value="-1">-----</option> 
      {% for pet in pets %} 
      <option value="{{ loop.index -1 }}">{{ pet.name }}</option> 
      {% endfor %} 
     </select> 
     </div> 
    </div> 
    <div class="form-group row"> 
     <label for="buyer" class="col-sm-2 form-control-label">Buyer:</label> 
     {% for message in form.buyer_id.errors %} 
     <div>{{ message }}</div> 
     {% endfor %} 
     <div class="col-sm-10"> 
     <input type="text" class="form-control" id="buyer_id" name="buyer_id" placeholder="Buyer" value="{{ buyer_id }}" required> 
     </div> 
    </div> 
    <div class="form-group row"> 
     <label for="paid" class="col-sm-2 form-control-label">Amount Paid:</label> 
     {% for message in form.paid.errors %} 
     <div>{{ message }}</div> 
     {% endfor %} 
     <div class="col-sm-10"> 
     <input type="text" class="form-control" id="paid" name="paid" placeholder="Amount Paid" value="{{ paid }}" required> 
     </div> 
    </div> 
    {% if form.errors %} 
    {{ form.errors }} 
    {% endif %} 
    <div class="form-group row"> 
     <div class="col-sm-offset-2 col-sm-10"> 
     <button type="submit" class="btn btn-primary">Place Order</button> 
     </div> 
    </div> 
     <input type="hidden" name="csrf_token" value="{{ csrf_token() 
}}"/> 
    </form> 


{% endblock %} 

編輯我在神社文件,productF更新的代碼字段的名字,我仍然收到錯誤。 Pets對象作爲JSON對象而不是app.py加載到HTML頁面中,但據我所知,這些值是相同的;這是怎樣的選擇元素來自檢查者出現:

<select id="product" class="form-control" name="product"> 
      <option value="-1">-----</option>   
      <option value="0">Cat</option>   
      <option value="1">Dog</option>   
      <option value="2">Parrot</option>   
      <option value="3">Hamster</option>   
     </select> 

回答

0

你定義pChoices爲列表

pChoices = [('-1', '-----'), 
      ('0', 'Cat'), 
      ('1', 'Dog'), 
      ('2', 'Parrot'), 
      ('3', 'Hamster')] 

但隨後在SelectField定義它包裹在另一個列表:

productF = SelectField(..., choices=[pChoices], ...) 

使用choices=pChoices應該修復它。

編輯:你也有pet在表單模板神社字段名,你可能想使用productF

編輯2:在定義pChoices的值和字段強制的方式中存在不匹配。從表單字段中刪除coerce=int,或者將pChoices中的元組的第一個值設置爲整數,而不是字符串。

+0

將它改爲'choices = pChoices'後仍然拋出同樣的錯誤 –

+0

請參閱編輯答案:) –

+0

仍然沒有運氣,請參閱我編輯的問題 –