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My application is showing error "Keyerror: 'A secret key is required to use CSRF.'", however in my config.py file I have the key created. What else could I check to remedy this error?
File config.py:
DEBUG = True
SECRET_KEY = 'minha_senha'
app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql+pymysql://root:''/meu_schema'
app.config['SECRET_KEY'] = SECRET_KEY
form py.
from flask_wtf import FlaskForm
from wtforms import StringField, PasswordField, BooleanField
from wtforms.fields.html5 import EmailField
from wtforms.validators import DataRequired, Email
class form_cadastro(FlaskForm):
nome = StringField('nome', validators=[DataRequired('Seu nome é requerido!')])
sobrenome = StringField('sobrenome', validators=[DataRequired('Seu sobrenome é requerido!')])
nickname = StringField('nickname', validators=[DataRequired('Seu Nick é requerido!')])
email = EmailField('email', validators=[DataRequired('Seu e-mail é requerido!')])
senha = PasswordField('password', validators=[DataRequired()])
HTML file cadastre.html
<!DOCTYPE html>
<html lang="pt-br">
<head>
<meta charset="utf-8">
<title>Cadastro</title>
<meta name="description" content="description">
<meta name="author" content="Evgeniya">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="{{ url_for('static', filename='plugins/bootstrap/bootstrap.css') }}" rel="stylesheet">
<link href="http://netdna.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.css" rel="stylesheet">
<link href='http://fonts.googleapis.com/css?family=Righteous' rel='stylesheet' type='text/css'>
<link href="{{ url_for('static', filename='css/style_v2.css') }}" rel="stylesheet">
<!-- HTML5 shim and Respond.js IE8 support of HTML5 elements and media queries -->
<!--[if lt IE 9]>
<script src="http://getbootstrap.com/docs-assets/js/html5shiv.js"></script>
<script src="http://getbootstrap.com/docs-assets/js/respond.min.js"></script>
<![endif]-->
</head>
<body>
<div class="container-fluid">
<div id="page-login" class="row">
<div class="col-xs-12 col-md-4 col-md-offset-4 col-sm-6 col-sm-offset-3">
<div class="text-right">
<a href="/login" class="txt-default">Já tem uma conta?</a>
</div>
<div class="box">
<div class="box-content">
<div class="text-center">
<h3 class="page-header">Cadastro NSP Dashboard Operacional</h3>
</div>
<form action"/cadastro" method="POST">
{{ form.csrf_token }}
<div class="form-group" action="" method="POST">
<label class="control-label">Nome</label>
{{ form.nome(_class="form-control", name="Nome", placeholder="Seu Nomes" )}}
</div>
<div class="form-group">
<label class="control-label">Sobrenome</label>
{{ form.sobrenome(_class="form-control" name="Sobrenome", placeholder="Seu Sobrenome")}}
</div>
<div class="form-group">
<label class="control-label">Nickname</label>
{{ form.nickname(_class="form-control" name="Nickname", placeholder="Seu Apelido")}}
</div>
<div class="form-group">
<label class="control-label">E-Mail</label>
{{ form.email(_class="form-control" name="email", placeholder="E-mail Corporativo")}}
</div>
<div class="form-group">
<label class="control-label">Password</label>
{{ form.password(_class="form-control" name="password")}}
</div>
</form>
<div class="text-center">
<a href="/" class="btn btn-primary" type='submit'>Cadastrar</a>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>
Good morning @Giovanni Nunes, thanks for the reply. I edited the html code above, I did not in this comment because it would not fit. However, it didn’t work, maybe because I’m doing something wrong yet, which would be normal because I don’t know about HTML. I took a model of how to use the tag in w3c, but I think it’s still wrong because it didn’t work.
– user120988
In my file init.py added the following lines:

from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from flask_wtf.csrf import CSRFProtect

app = Flask(__name__)
csrf = CSRFProtect(app)

db = SQLAlchemy(app)

from app.controllers import default

– user120988