今天写表单的时候发现rules校验一直不生效，不管填没填信息，valid返回都是true，我以为是我写错了，可是看了一下之前写的也无法校验了，你们有这种情况吗？

    <mp-form id="form" rules="{{rules}}" models="{{formData}}">
      <mp-cells>
        <mp-cell prop="business" title="营业执照" ext-class="" >
          <input wx:if="{{!formData.image}}" bindtap="chooseimage" disabled="true" value="{{formData.business}}" data-field="business" class="weui-input" placeholder="点击选择营业执照" />
          <image wx:if="{{formData.image}}" bindtap="chooseimage" src="{{formData.image}}" mode="widthFix" class="img_business"></image>
        </mp-cell>
        <mp-cell prop="identiry" title="法人身份证" ext-class="">
          <input bindinput="formInputChange" value="{{formData.identiry}}" data-field="identiry" class="weui-input" placeholder="请输入法人身份证" />
        </mp-cell>
        <mp-cell prop="name" title="法人姓名" ext-class="">
          <input bindinput="formInputChange" value="{{formData.name}}" data-field="name" class="weui-input" placeholder="请输入法人姓名" />
        </mp-cell>
        <mp-cell prop="tel" title="法人电话" ext-class="">
          <input bindinput="formInputChange" value="{{formData.tel}}" data-field="tel" class="weui-input" placeholder="请输入手机号码" />
        </mp-cell>
      </mp-cells>
    </mp-form>

        data:{
        formData: {
        },
        rules: [{
          business: '营业执照',
          identiry: '法人身份证',
          name: '法人姓名',
          tel: '法人电话',
        }]
        }