1. /login 에서 GET, POST 받아오기
# app/routes.py
from app import app
from flask import render_template, flash, redirect
from app.forms import LoginFrom
@app.route('/login', methods=['GET', 'POST'])
def login():
testform = LoginForm()
if testform.validate_on_submit():
flash('Login requested for user {}, remember_me={}'.format(
testform.username.data, testform.remember_me.data))
return redirect('/index')
return render_template('login.html', title='Sign In', form=testform)
2. 기본 템플릿에서 깜빡이는 메시지 flash
<!-- vim app/templates/base.html -->
<html>
<head>
{% if title %}
<title>{{ title }} - Microblog</title>
{% else %}
<title>Welcome to Microblog</title>
{% endif %}
</head>
<body>
<div>
Microblog:
<a href="/index">Home</a>
<a href="/login">Login</a>
</div>
<hr>
{% with messages = get_flashed_messages() %}
{% if mwssages %}
<ul>
{% for message in messages %}
<li>{{ message }}</li>
{% endfor %}
</ul>
{% endif %}
{% endwith %}
{% block content %}{% endblock %}
</body>
</html>
3. 로그인 양식 템플릿의 유효성 검증 오류
<!-- vim app/tesmplates/login.html -->
{% extends "base.html" %}
{% block content %}
<h1>Sign In</h1>
<form action="" method="post" novalidate>
{{ form.hidden_tag() }}
<p>
{{ form.username.label }}<br>
{{ form.username(size=32) }}
{% for error in form.username.errors %}
<span style="color: red;">[{{ error }}]</span>
{% endfor %}
</p>
<p>
{{ form.password.label }}<br>
{{ form.password(size=32) }}<br>
{% for error in form.password.errors %}
<span style="color: red;">[{{ error }}]</span>
{% endfor %}
</p>
<p>{{ form.remember_me() }} {{ form.remember_me.label }}</p>
<p>{{ form.submit() }}</p>
</form>
{% endblock %}
비어있는 상태로 Sign in 버튼 클릭시 위와 같이 잘 출력됩니다.
4. url_for 사용하여 링킹 관리 간소화하기
# app/routes.py
from app import app
from flask import render_template, flash, redirect, url_for
from app.forms import LoginFrom
@app.route('/login', methods=['GET', 'POST'])
def login():
testform = LoginForm()
if testform.validate_on_submit():
flash('Login requested for user {}, remember_me={}'.format(
testform.username.data, testform.remember_me.data))
return redirect(url_for('index'))
return render_template('login.html', title='Sign In', form=testform)<!-- vim app/templates/base.html -->
<html>
<!-- ... -->
<div>
Microblog:
<a href="{{ url_for('index') }}">Home</a>
<a href="{{ url_for('login') }}">Login</a>
</div>
<!-- ... -->
</html>