单击时通过AJAX传递POST数据

Question

我使用Opencart和MVC faramework。我需要通过AJAX提交表格。 Poblem是它插入BD，并进入成功，但在检查数据成功时它进入错误状态。找不到我的错误，也许我在控制器端出错。请帮我找到它，失去半天没有结果。

P.S。此外，如果我取消注释dataType：Json它停止完全工作，也不知道为什么。

这是HTML

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<form class="form-horizontal" method="POST" id="form-callback">
  <div class="cb" id="cb"></div>
  <input type="hidden" name="product_id" id="product_id" value="{{ product_id }}" />
  <div class="form-group">
    <div class="col-xs-12 col-sm-12 col-md-10 col-lg-8 pull-right">
      <input type="text" class="form-control bluebord" name="name" id="namecb" placeholder="Ad" required />
    </div>
  </div>
  <div class="form-group">
    <div class="col-xs-12 col-sm-12 col-md-10 col-lg-8 pull-right">
      <input type="text" class="form-control bluebord" name="surname" id="surnamecb" placeholder="Soyad" required />
    </div>
  </div>
  <div class="form-group">
    <div class=" col-xs-12col-sm-12 col-md-10 col-lg-8 pull-right">
      <input type="text" class="form-control bluebord" name="phone" id="phonecb" placeholder="+994(XX)XXX-XX-XX" required />
    </div>
  </div>
  <div class="form-group">
    <div class="col-xs-12 col-sm-12 col-md-10 col-lg-8 pull-right">
      <button type="button" id="submit_cb" data-action="{{ action_callback }}" data-loading-text="{{ text_loading }}" class="btn btn-porty btn-block">{{ button_order }}</button>
    </div>
  </div>
</form>

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这是AJAX

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$(document).on('click', '#submit_cb', function(e) {
  e.preventDefault();

  var action = $(this).data('action');
  var name = $('#namecb').val();
  var surname = $('#surnamecb').val();
  var phone = $('#phonecb').val();
  var product_id = $('#product_id').val();

  $.ajax({
    type: "post",
    url: action,
    cache: false,
    //dataType: "json",
    data: {
      'name': name,
      'surname': surname,
      'phone': phone,
      'product_id': product_id
    },
    beforeSend: function() {
      console.log('Start...');
    },
    success: function(data) {
      if (data) {         //NOT ENTERS TO THIS CONDITION
        console.log(data); 
      } else {
        console.log('error');
      }
    },
    error: function() {
      console.log('something went wrong');
    }
  });
});

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这是我的控制器

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    public function addCB(){
        if($this->request->server['REQUEST_METHOD'] == 'POST'){
            $this->load->model('callback/callback');
            $this->model_callback_callback->addCall($this->request->post);
            //$json['success'] = $this->language->get('text_success');

            return $data['success'] = true;
        }

    }

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