Shopify - Liquid -{%如果form. postd_successfully ?%}不能用于注册客户模块

我必须在密码中包含注册表。liquid (Shopify)…表单可以工作，但是表单处理后没有显示成功消息…根据文档，它应该可以工作。

 {% form 'create_customer', class: 'customer-register' %}

   {% if form.posted_successfully? %}
   <div>Thank you for your enquiry! We will get back to you as soon as possible!</div>
  {% else %}
    {{ form.errors | default_errors }}
  {% endif %}

     <div id="naeark">New Account Enquiry</div>
     <div id="naetark">To get started as a Plum & Ashby stockist, please tell us a little about your store!</div>

      <input type="text" id="arkfn" placeholder="First Name" value="{{ form.first_name }}" name="customer[first_name]" class="{% if form.errors contains "first_name" %}error{% endif %}">
      <input type="text" id="arkln" placeholder="Last Name" value="{{ form.last_name }}" name="customer[last_name]" class="{% if form.errors contains "last_name" %}error{% endif %}">
      <input type="text" id="arkmail" placeholder="Email" value="{{ form.email }}" name="customer[email]" class="{% if form.errors contains "email" %}error{% endif %}">

    <input id="telephone"  type="text" name="customer[note][Telephone]" placeholder="Telephone" />
    <input id="website"  type="text" name="customer[note][Website]" placeholder="Website" />
    <input id="storename"  type="text" name="customer[note][StoreName]" placeholder="Store Name" />
    <input id="streetaddress1"  type="text" name="customer[note][StreetAddress]" placeholder="Street Address" />
    <input id="streetaddress2"  type="text" name="customer[note][StreetAddress2]" placeholder="Street Address 2" />
    <input id="City" type="text" name="customer[note][City]" placeholder="City" />
    <input id="state-region" type="text" name="customer[note][state-region]" placeholder="State/Region" />
    <input id="Country" type="text" name="customer[note][Country]" placeholder="Country" />
    <input id="Zip-PostalCode" type="text" name="customer[note][Zip-PostalCode]" placeholder="Zip/Postal Code" />
      <div id="ATCont">
        <div class="titleat">Account Type</div>
        <input type="checkbox" value="Brick & Mortar Retailer" name="customer[note][BMR]" id="BMR" />
        <label for="BMR" class="login labelark">Brick & Mortar Retailer</label>
        <input type="checkbox" value="Online Retailer" name="customer[note][OR]" id="OR" />
        <label for="OR" class="login labelark">Online Retailer</label>
        <input type="checkbox" value="Rep/Distributor" name="customer[note][RD]" id="RD" />
        <label for="RD" class="login labelark">Rep/Distributor</label>
      </div>

     <input id="Question" type="text" name="customer[note][Question]" placeholder="Question/Comment" />
      <input id="arkpwd" type="password" placeholder="Password" value="" name="customer[password]">
    <div class="input-wrapper">
      <input type="submit" value="{{ 'customers.register.submit' | t }}">
    </div>
            {% endform %}
  {% endif %}