在drupal 7中ajax回调表单之前检查一个条件

Question

我在文本字段上编写了ajax回调,并在模糊事件上调用它.

但是在它进行ajax回调之前,我想检查textfield不为空的条件.

所以我想,如果textfield不为空,则调用ajax回调,否则不应该调用它.

提前致谢

form_example是我的模块名称

表格控制

$form['price_form']['item'] = array(
    '#type' => 'textfield',
    '#title' => 'Item Name?',
    '#size' => 10,
    '#maxlength' => 25,
    '#id' => 'nameId',
    '#required' => TRUE,
    '#ajax' => array(
        // #ajax has two required keys: callback and wrapper.
        // 'callback' is a function that will be called when this element changes.
        'callback' => 'form_example_simplest_callback',
        'wrapper' => 'listDiv',
        'effect' => 'fade',
    ),
    '#autocomplete_path' => 'examples/form_example/item_name_autocomplete_callback',
);

JS代码

(function($){
    $(document).ready(function(){
        alert('Hi, Javascript successfully attached');

        Drupal.behaviors.form_example = {
            attach: function (context, settings) {

                // Overwrite beforeSubmit
                Drupal.ajax['nameId'].options.beforeSubmit = function (form_values, element, options) {
                    alert('dsf');
                }
            }
        };
    });
})(jQuery);

我打印测试警报.我尝试了它的名字和它的身份但没有得到警报.我得到了低于警报,所以js包含罚款.

alert('Hi, Javascript successfully attached');

Answer 1

api形式的ajax实现允许您指定将在提交之前运行的'beforeSubmit'处理程序.根据这个:http://malsup.com/jquery/form/#options-object如果该函数返回false,则不会提交表单.

您应该能够添加一个beforesubmit处理程序,如:

Drupal.behaviors.MyModule = {
  attach: function (context, settings) {

    // Overwrite beforeSubmit
    Drupal.ajax['your_element'].options.beforeSubmit = function (form_values, element, options) {
        // check the textfield isn't blank then return false;
    }
  }
};