Pagination

提交Blog Post

#forms.py
class PostForm(FlaskForm):
    post = TextAreaField('Say something', validators=[
        DataRequired(), Length(min=1, max=140)])
    submit = SubmitField('Submit')

#index.html
{% extends "base.html" %}

{% block content %}
    <h1>Hi, {{ current_user.username }}!</h1>
    <form action="" method="post">
        {{ form.hidden_tag() }}
        <p>
            {{ form.post.label }}<br>
            {{ form.post(cols=32, rows=4) }}<br>
            {% for error in form.post.errors %}
            <span style="color: red;">[{{ error }}]</span>
            {% endfor %}
        </p>
        <p>{{ form.submit() }}</p>
    </form>
    {% for post in posts %}
    <p>
    {{ post.author.username }} says: <b>{{ post.body }}</b>
    </p>
    {% endfor %}
{% endblock %}

from app.forms import PostForm
from app.models import Post

@app.route('/', methods=['GET', 'POST'])
@app.route('/index', methods=['GET', 'POST'])
@login_required
def index():
    form = PostForm()
    if form.validate_on_submit():
        post = Post(body=form.post.data, author=current_user)
        db.session.add(post)
        db.session.commit()
        flash('Your post is now live!')
        return redirect(url_for('index'))
    posts = [
        {
            'author': {'username': 'John'},
            'body': 'Beautiful day in Portland!'
        },
        {
            'author': {'username': 'Susan'},
            'body': 'The Avengers movie was so cool!'
        }
    ]
    return render_template("index.html", title='Home Page', form=form,
                           posts=posts)

当我们响应POST请求时,通常会重定向到某个Web地址,这时一般做法.post后重定向后,POST状态将会变成GET状态

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