Python 烧瓶属性错误：'；HTMLString'；对象没有属性'__调用'；

我创建了一个宏来处理表单错误，如下所示：

    {% macro render_field_with_errors(field) %}
       <p> 
          {{ field.label }} {{ field(**kwargs)|safe }}
          {% if field.errors %}
             <ul>
                  {% for error in field.errors %}
                     <li style="color: red;">{{ error }}</li>
                  {% endfor %}
            </ul>
          {% endif %}
       </p>
    {% endmacro %}

{% macro render_field(field) %}
   <p>{{ field(**kwargs)|safe }}</p>
{% endmacro %}

from flask.ext.wtf import Form, TextField, BooleanField, PasswordField, RadioField, SelectMultipleField
from flask.ext.wtf import Required

class LoginForm(Form):
    username = TextField('email', validators = [Required()])
    password = PasswordField('password', validators=[Required()])
    remember_me = BooleanField('remember_me', default = False)

<!-- Login form -->
{% from "includes/_formhelpers.html" import render_field_with_errors %}
<form method="POST" action="/login" focus="first">
        <div class="span5">
                {{ login_form.hidden_tag() }}
                {{ render_field_with_errors(login_form.username(placeholder="Username / Email", class="span10")) }}
                <br>
                 {{ render_field_with_errors(login_form.password(placeholder="Password", class="span10")) }}
                 <br>
                 <div class="qp-log">
                     {{ render_field_with_errors(login_form.remember_me(class="qp-login", value="remember_me")) }} Remember Me
                     <br>
                     <button type="submit" class="btn qp-btn" style="height:30px;width:56px;">Login</button>
                     <button type="Reset" class="btn">Clear</button>
                 </div>
                 <div class="qp-pass">
                     Forgot Password? <a href ="#">click here</a>
                 </div>
        </div>
<div class="span2">
              <br>
              <br>
              <br> &nbsp;
              <img src="{{ url_for('static', filename='img/or_icon.gif') }}">
        </div>
        <div class="span5">
            <center>
                <br>
                <button class="btn btn-facebook">
                        <small>Connect with</small>
                        <big>  Facebook </big>
                </button>
                <h4> or </h4>
                <button type="Submit" class="btn qp-btn">
                        <a href="signup.html" style="color:white;">Sign Up for Free</a>
                </button>
            </center>
       </div>
</form>
<!-- Form End -->

我的登入表格如下：

    {% macro render_field_with_errors(field) %}
       <p> 
          {{ field.label }} {{ field(**kwargs)|safe }}
          {% if field.errors %}
             <ul>
                  {% for error in field.errors %}
                     <li style="color: red;">{{ error }}</li>
                  {% endfor %}
            </ul>
          {% endif %}
       </p>
    {% endmacro %}

{% macro render_field(field) %}
   <p>{{ field(**kwargs)|safe }}</p>
{% endmacro %}

from flask.ext.wtf import Form, TextField, BooleanField, PasswordField, RadioField, SelectMultipleField
from flask.ext.wtf import Required

class LoginForm(Form):
    username = TextField('email', validators = [Required()])
    password = PasswordField('password', validators=[Required()])
    remember_me = BooleanField('remember_me', default = False)

<!-- Login form -->
{% from "includes/_formhelpers.html" import render_field_with_errors %}
<form method="POST" action="/login" focus="first">
        <div class="span5">
                {{ login_form.hidden_tag() }}
                {{ render_field_with_errors(login_form.username(placeholder="Username / Email", class="span10")) }}
                <br>
                 {{ render_field_with_errors(login_form.password(placeholder="Password", class="span10")) }}
                 <br>
                 <div class="qp-log">
                     {{ render_field_with_errors(login_form.remember_me(class="qp-login", value="remember_me")) }} Remember Me
                     <br>
                     <button type="submit" class="btn qp-btn" style="height:30px;width:56px;">Login</button>
                     <button type="Reset" class="btn">Clear</button>
                 </div>
                 <div class="qp-pass">
                     Forgot Password? <a href ="#">click here</a>
                 </div>
        </div>
<div class="span2">
              <br>
              <br>
              <br> &nbsp;
              <img src="{{ url_for('static', filename='img/or_icon.gif') }}">
        </div>
        <div class="span5">
            <center>
                <br>
                <button class="btn btn-facebook">
                        <small>Connect with</small>
                        <big>  Facebook </big>
                </button>
                <h4> or </h4>
                <button type="Submit" class="btn qp-btn">
                        <a href="signup.html" style="color:white;">Sign Up for Free</a>
                </button>
            </center>
       </div>
</form>
<!-- Form End -->

我没有发现代码中有什么错误？如果我从html中删除宏 文件，而不是包含用于html格式错误处理的for循环，它工作得非常完美。什么 我认为是，元素中包含的占位符和类导致 错误，但不确定原因

---

我最近遇到了类似的问题，我相信问题在于login.html中的这种模式

 {{ render_field_with_errors(login_form.password(placeholder="Password", class="span10")) }}

您正在将占位符和类传递给登录表单，此时该表单只是wtf生成的一段html。如果我在我的flask版本中尝试这个，我会得到完全相同的错误，即使其余的代码是不同的。如果我在助手中传递占位符和类，则错误消失：

{{ field(class="span10",placeholder="Password",**kwargs)|safe }}

如果无法在助手中传递通用占位符和类，则始终可以在模板中指定它们

<div class=span10> {{render_field_with_errors(loginForm.password) }} </div>

这很有意义-您正在将关键字参数传递给字段。您没有向它传递一个带有参数的函数，它无法处理该函数，而只是传递了几个关键字参数。希望这有帮助。

“{render\u field\u带有错误（login\u form.password，placeholder=“password”，class=“span10”）}”为我工作，谢谢。