python flask web 博客实例 评论模块 4

1 　app/models.py class Comment(db.Model): tablename = 'comments' id = db.Column(db.Integer, primary_key=True) body = db.Column(db.Text) body_html = db.Column(db.Text) timestamp = db.Column(db.DateTime, index=True, default=datetime.utcnow) disabled = db.Column(db.Boolean) author_id = db.Column(db.Integer, db.ForeignKey('users.id')) post_id = db.Column(db.Integer, db.ForeignKey('posts.id')) @staticmethod def on_changed_body(target, value, oldvalue, initiator): allowed_tags = ['a', 'abbr', 'acronym', 'b', 'code', 'em', 'i','strong'] target.body_html = bleach.linkify(bleach.clean(markdown(value, output_format='html'),tags=allowed_tags, strip=True))

db.event.listen(Comment.body, 'set', Comment.on_changed_body)

2 app/models.py class User(db.Model): # ... comments = db.relationship('Comment', backref='author', lazy='dynamic') class Post(db.Model): # ... comments = db.relationship('Comment', backref='post', lazy='dynamic')

3 app/main/forms.py class CommentForm(Form): body = StringField('', validators=[Required()]) submit = SubmitField('Submit')

4 app/main/views.py @main.route('/post/<int:id>', methods=['GET', 'POST']) def post(id): post = Post.query.get_or_404(id) form = CommentForm() if form.validate_on_submit(): comment = Comment(body=form.body.data,post=post,author=current_user._get_current_object()) db.session.add(comment) flash('Your comment has been published.') return redirect(url_for('.post', id=post.id, page=-1)) page = request.args.get('page', 1, type=int) if page == -1: page = (post.comments.count() - 1) / current_app.config['FLASKY_COMMENTS_PER_PAGE'] + 1 pagination = post.comments.order_by(Comment.timestamp.asc()).paginate(page, per_page=current_app.config['FLASKY_COMMENTS_PER_PAGE'],error_out=False) comments = pagination.items return render_template('post.html', posts=[post], form=form,comments=comments, pagination=pagination) @main.route('/moderate') @login_required @permission_required(Permission.MODERATE_COMMENTS) def moderate(): page = request.args.get('page', 1, type=int) pagination = Comment.query.order_by(Comment.timestamp.desc()).paginate(page, per_page=current_app.config['FLASKY_COMMENTS_PER_PAGE'],error_out=False) comments = pagination.items return render_template('moderate.html', comments=comments,pagination=pagination, page=page) @main.route('/moderate/enable/<int:id>') @login_required @permission_required(Permission.MODERATE_COMMENTS) def moderate_enable(id): comment = Comment.query.get_or_404(id) comment.disabled = False db.session.add(comment) return redirect(url_for('.moderate',page=request.args.get('page', 1, type=int))) @main.route('/moderate/disable/<int:id>') @login_required @permission_required(Permission.MODERATE_COMMENTS) def moderate_disable(id): comment = Comment.query.get_or_404(id) comment.disabled = True db.session.add(comment) return redirect(url_for('.moderate',page=request.args.get('page', 1, type=int)))

5 　app/templates/base.html {% if current_user.can(Permission.MODERATE_COMMENTS) %} <li><a href="{{ url_for('main.moderate') }}">Moderate Comments</a></li> {% endif %}

6 app/templates/moderate.html {% extends "base.html" %} {% import "_macros.html" as macros %} {% block title %}Flasky - Comment Moderation{% endblock %} {% block page_content %} <div class="page-header"> <h1>Comment Moderation</h1> </div> {% set moderate = True %} {% include '_comments.html' %} {% if pagination %} <div class="pagination"> {{ macros.pagination_widget(pagination, '.moderate') }} </div> {% endif %} {% endblock %}

7 app/templates/_comments.html <div class="comment-body"> {% if comment.disabled %} <p></p><i>This comment has been disabled by a moderator.</i></p> {% endif %} {% if moderate or not comment.disabled %} {% if comment.body_html %} {{ comment.body_html | safe }} {% else %} {{ comment.body }} {% endif %} {% endif %} </div> {% if moderate %} {% if comment.disabled %} <a class="btn btn-default btn-xs" href="{{ url_for('.moderate_enable', id=comment.id, page=page) }}">Enable</a> {% else %} <a class="btn btn-danger btn-xs" href="{{ url_for('.moderate_disable', id=comment.id, page=page) }}">Disable</a> {% endif %} {% endif %}

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