我正在为Flask表单输入创建自定义验证器,并且作为示例,我在下面定义了一个函数,该函数检查您是否在输入中包含“ s3://”,如果没有,我想要引发错误。
当我对此进行测试并在输入中省略“ s3://”时,不会引发任何错误。我在做什么错了?
表单类:
from flask_wtf import FlaskForm
from wtforms import StringField, TextField, SubmitField, IntegerField, SelectField, validators
from wtforms.validators import ValidationError
import boto3
# CUSTOM VALIDATOR
def is_s3_uri(form, field):
if "s3://" not in field.data:
raise ValidationError('Bucket name must contain full path. Missing "s3://".')
class InputForm(FlaskForm):
input_uri = StringField('INPUT BUCKET', validators=[validators.required(), is_s3_uri])
output_uri = StringField('OUTPUT BUCKET', validators=[validators.required(), is_s3_uri])
HTML:
<div class="tab">
<h3>File Locations:</h3>
<div class="form-group required">
{{ form.input_uri.label }}: {{ form.input_uri(placeholder="(e.g. s3://pipeline-run/fastqs/)...", oninput=", this.className = ''") }}
</div>
{% if form.input_uri.errors %}
<ul class="errors">{% for error in form.input_uri.errors %}<li>{{ error }}</li>{% endfor %}</ul>
{% endif %}
<div class="form-group required">
{{ form.output_uri.label }}: {{ form.output_uri(placeholder="(e.g. s3://pipeline-run/results/)...", oninput="this.className = ''") }}
</div>
{% if form.input_uri.errors %}
<ul class="errors">{% for error in form.output_uri.errors %}<li>{{ error }}</li>{% endfor %}</ul>
{% endif %}
</div>
更新:
我还尝试添加一个内置的验证器(例如,使用Length(min=6, max=120))
,但这也没有强制执行。
stack_name = StringField('STACK NAME', validators=[Length(min=4, max=120), DataRequired()])
更新2 :
@app.route('/', methods=['GET', 'POST'])
def pipeline():
INPUT_URI = ''
OUTPUT_URI = ''
form = InputForm(request.form)
if request.method == 'POST':
if form.validate_on_submit():
INPUT_URI = request.form['input_uri']
OUTPUT_URI = request.form['output_uri']
# process info
else:
flash('Invalid params. Please re-try.', 'danger')
return redirect(request.path)
return render_template('pipeline-alt.html',
title='Pipeline Input',
form=form)
更新3 : 使用Jquery表单验证插件
HTML:
<div class="form-group required">
{{ form.input_uri.label }}: {{ form.input_uri(placeholder="(e.g. s3://pipeline-run/fastqs/)...", oninput=", this.className = ''", name="input_uri") }}
</div>
jQuery:
<script>
$(document).ready(function () {
$('#regForm').validate({ // initialize the plugin
rules: {
input_uri: {
required: true,
minlength: 4
}
},
submitHandler: function (form) { // for demo
alert('valid form submitted'); // for demo
return false; // for demo
}
});
});
</script>
结果:TypeError: html_params() got multiple values for keyword argument 'name'
答案 0 :(得分:0)
您是否正在验证提交的表单?您没有发布足够的代码,但我会尽力提供帮助。
在呈现的视图中,您应该使用form.validate_on_submit()
以便表单得到验证。我看不到您发布的HTML中的整个表单代码,如果是这样,则您缺少将表单发送到服务器进行验证的“提交”按钮。
请发布您的视图(呈现表单)代码
您的表单应在下面示例的方法中使用POST
。
您处理表单的视图的示例应该与form.validate_on_submit()
from flask import request
@app.route('/form_route', methods=['GET', 'POST'])
def form_route():
form = YourFormClass()
if request.method == 'POST':
if form.validate_on_submit():
# validation will be triggered from the if statement and if it validates, it will enter this if block
# perform actions if the form is valid
else:
# do somthing if the form is not valid
return render_template(form=form)