[英]Flask WTForm validation failing for SelectField…why?
I'm using Flask and WTForm to make a web app, so far my other two fields validate fine, but the SelectField is throwing the error 'Please choose a pet.' 我正在使用Flask和WTForm制作一个Web应用程序,到目前为止,我的其他两个字段都可以很好地验证,但是SelectField抛出错误“请选择一只宠物”。 as specified by myself ie it thinks thinks that it isn't receiving a valid input. 正如我自己指定的,即认为自己没有收到有效的输入。 The SelectField.choices match up to the options rendered into HTML so what am I doing wrong? SelectField.choices与呈现为HTML的选项匹配,所以我在做什么错呢?
app.py 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 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 %}
edit I have updated the code with productF as the field name in the jinja file and I still receive the error. 编辑我已使用productF作为jinja文件中的字段名称更新了代码,但仍然收到错误。 The Pets
object is loaded into the HTML page as a JSON object instead of app.py but as far as I can tell the values are identical; Pets
对象作为JSON对象而不是app.py加载到HTML页面中,但是据我所知,值是相同的。 this is how the select element appears from the inspector: 这是检查器中选择元素的显示方式:
<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>
You're defining pChoices
as a list 您正在将pChoices
定义为列表
pChoices = [('-1', '-----'),
('0', 'Cat'),
('1', 'Dog'),
('2', 'Parrot'),
('3', 'Hamster')]
But then wrapping it in another list in the SelectField
definition: 但是,然后将其包装在SelectField
定义的另一个列表中:
productF = SelectField(..., choices=[pChoices], ...)
Using choices=pChoices
should fix it. 使用choices=pChoices
应该修复它。
Edit: you also have pet
as the field name in the form jinja template, you probably want to use productF
. 编辑:您也有pet
作为表单jinja模板中的字段名称,您可能要使用productF
。
Edit 2: there's a mismatch on the way you're defining the values for pChoices
and the field coercion. 编辑2:定义pChoices
和字段强制的值的方式不匹配。 Either remove coerce=int
from the form field or set the first value of the tuples in pChoices
to be integers, not strings. 从表单字段中删除coerce=int
或将pChoices
中的元组的第一个值设置为整数,而不是字符串。
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