当我使用表单操作提交表单数据时，我能够将消息闪回。

查看表格：

@app.route('/register')
def register():
    return render_template('register.html')

注册.HTML

<form action="{{ url_for('processRegister') }}" method=post>
        <dl>
          <dt>email:
          <dd><input type="text" name="email" id="email">
          <div id="emailBlank" class="error"><font color="red">email cannot be blank</font></div>
          <div id="emailFormat" class="error"><font color="red">invalid email format</font></div>
          <dt>Password:
          <dd><input type="password" name="password" id="password">
          <div id="pwBlank" class="error"><font color="red">password cannot be blank</font></div>
          <dt>Enter password again:
          <dd><input type="password" name="password2" id="password2">
          <div id="pw2Blank" class="error"><font color="red">verify password field cannot be blank</font></div>
          <dd><input type="submit" value="submit" id="submit"><br><br>
        </dl>
        </form>
      <a href="{{ url_for('verifyEmailForm') }}">send another verification email</a>
    {% endblock %}

现在，我正在使用ajax，不再显示Flash消息。

$(document).ready(function(){
   (code removed for clarity)

            if (error == false) {
                $.ajax({
                  type: "POST",
                  url: "/processRegister",
                  data: { varEmail: email, varPassword: pw}
                });//ajax call
            }//end if
        });//submit
    });//load validate.js
});//doc rdy

我的观点来处理表格数据：

@app.route('/processRegister', methods=['POST'])
    def processRegister():
        if request.method == 'POST':
            email = request.form['varEmail']
            flash("message -----> " + email)
        return render_template('register.html')

我的布局页面使用以下代码段进行闪烁：

{% with messages = get_flashed_messages() %}
  {% if messages %}
    <ul class=flashes>
    {% for message in messages %}
      <li>{{ message }}</li>
    {% endfor %}
    </ul>
  {% endif %}
{% endwith %}