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我在我的应用程序中编写了一个基本的消息传递功能，它完成了它应该做的事情。它在收件箱和发件箱中发送、接收和排序消息，我希望它显示发送者的昵称（TO：'nickname'）和接收消息的人（FROM：'nickname'）

解决了

class Message(db.Model):
    id = db.Column(db.Integer, primary_key = True)
    body = db.Column(db.String(140))
    timestamp = db.Column(db.DateTime)
    for_id = db.Column(db.Integer)
    **for_nickname = db.Column(db.String(140))**
    user_id = db.Column(db.Integer, db.ForeignKey('user.id'))
    def __repr__(self): # pragma: no cover
        return '<Message %r>' % (self.body)

我刚刚在我的表中为昵称添加了一个字段，因此我可以从发布的数据中访问它。我觉得再写两个查询并比较它们以获得相同的结果对于这样的事情来说太多了。

编辑：

风景：

@app.route('/poraki', methods = ['GET', 'POST'])
@login_required
def poraki(page=1):
   form = PostMessage()
   nick = form.nickname.data
   nickname = User.query.filter_by(nickname = nick).first()
   if form.validate_on_submit():
    m = Message(body = form.post.data,
        timestamp = datetime.utcnow(),
        author = g.user,
        for_id = nickname.id)
    db.session.add(m)
    db.session.commit()
    flash(gettext(u'Вашата порака е пратена!'))
    return redirect(url_for('poraki'))
    #inbox
    sent = User.query.filter_by(nickname = g.user.nickname).first()
    all_inbox = Message.query.filter_by(for_id = sent.id).order_by(Message.timestamp.desc()).paginate(page, POSTS_PER_PAGE, False)
    #sent
    all_sent = Message.query.filter_by(user_id = sent.id).order_by(Message.timestamp.desc()).paginate(page, POSTS_PER_PAGE, False)

    return render_template('messages.html', form = form, posts1 = all_sent, posts2 = all_inbox, title = u'Пораки')

后消息（）：

class PostMessage(Form):
    nickname = TextField('nickname', validators = [Required()])
    post = TextField('post', validators = [Required()])

message.html 模板：

<td width="70px"><a href="{{url_for('user', nickname = post.author.nickname)}}"><img src="{{post.author.avatar(70)}}" /></a></td>
    <td>
        {% autoescape false %} 
        {% if prateni == 1 %}
        <p>{{ _('До: %(nickname)s ', nickname = '<a href="%s">%s</a>' % (url_for('user', nickname = post.for_id), post.for_id)) }}</p>
        {% else %}
        <p>{{ _('Од: %(nickname)s ', nickname = '<a href="%s">%s</a>' % (url_for('user', nickname = post.author.nickname), post.author.nickname)) }}</p>
        {% endif %}
        {% endautoescape %}
        <p><strong><span id="post{{post.id}}">{{post.body}}</span></strong></p>
        {% autoescape false %}
        <p>{{ _('%(when)s', when = momentjs(post.timestamp).fromNow() ) }} </p>
        {% endautoescape %}

        <!-- {% if post.author.id == g.user.id %}
        <div><a href="{{ url_for('delete', id = post.id) }}">{{ _('Избриши') }}</a></div>
        {% endif %} -->
    </td>

messages.html 模板：

<div class="well">
<form class="form-horizontal" action="" method="post" name="post">
    {{form.hidden_tag()}}
    <div class="control-group{% if form.errors.post %} error{% endif %}">
        <label class="control-label" for="nickname">{{ _('До:') }}</label>
        <div class="controls">
            {{ form.nickname(size = 30, maxlength = 140) }}
            {% for error in form.errors.nickname %}
                <span class="help-inline">[{{error}}]</span><br>
            {% endfor %}
        </div>
    </div>
    <div class="control-group{% if form.errors.post %} error{% endif %}">
        <label class="control-label" for="post">{{ _('Порака:') }}</label>
        <div class="controls">
            {{ form.post(cols = 64, rows = 4, class = "span4") }}
            {% for error in form.errors.post %}
                <span class="help-inline">[{{error}}]</span><br>
            {% endfor %}
        </div>
    </div>
    <div class="control-group">
        <div class="controls">
            <input class="btn btn-primary" type="submit" value="{{ _('Прати!') }}">
        </div>
    </div>
</form>
</div>
<table class="table">
<tr>

<td width=50%> Пратени пораки {{ proba }}
{% set prateni = 1 %}
{% for post in posts1.items %}
    {% include 'message.html' %}
{% endfor %}
</td width=50%>
<td> Примени пораки
{% set prateni = 0 %}
{% for post in posts2.items %}
    {% include 'message.html' %}
{% endfor %}
</td>
</tr>
</table>
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