javascript - jquery-queryBuilder init 规则与最后提交的搜索

Question

我有一个集成了插件 querybuilder.js.org

的表单

我的 js 是:

来自:scripts.js

$(document).ready(function(e) {

 // INIT PLUGIN

 $('#queryBuilder').queryBuilder({
   plugins: ['bt-tooltip-errors'],
   filters: [{
     id: 'description',
     label: 'Description',
     type: 'string'
   }]
 });

 // RESTORE RULES FROM LAST SEARCH

 $('#queryBuilder').queryBuilder('setRules', decodeURIComponent($("#rules").val()) );

 // ON SUBMIT, EDIT THE FORM AND APPEND SQL, PARAMS to USE IN SEARCH FROM DATABASE, AND APPEND RULES TO RESTORE IT TO NEXT LOAD OF THE PAGE

 $("#btn-submit").on("click", function(e) {

    e.preventDefault(); 
    var form = $("#form");  
    var rules = $('#queryBuilder').queryBuilder('getRules');
    var query = $('#queryBuilder').queryBuilder('getSQL', 'question_mark');

    // FOR RESTORE INITIAL VALUES ON RELOAD PAGE            
    form.append('<input type="hidden" name="rules" value="' + encodeURIComponent(JSON.stringify(rules, null, 2)) + '">');

    form.append('<input type="hidden" name="sql" value="' + query.sql + '">');

    form.append('<input type="hidden" name="params" value="' + encodeURIComponent(JSON.stringify(query.params, null, 2)) + '">');

    form.submit();

 });

});

我在 index.php 中的一段代码是:

<?php

  if ( isset($_POST) ) {

  $rules = isset($_POST['rules']) ? $_POST['rules'] : "";

  }

  ?>

  <form name="form" id="form" role="form" method="post" action="">
    <div id="queryBuilder"></div>

    <!--used only to restore rules in jquery-querybuilder-->
    <input type="hidden" id="rules" value="<?php echo $rules; ?>">


    <button type="button" id="btn-submit" class="btn btn-success">Search</button>
  </form>

问题是规则没有按预期恢复。

如果我在文档准备就绪时插入警告如:

alert(decodeURIComponent($("#rules").val()));

我得到了正确的规则:

{
  "condition": "AND",
  "rules": [
    {
      "id": "description",
      "field": "description",
      "type": "string",
      "input": "text",
      "operator": "equal",
      "value": "test value"
    }
  ],
  "valid": true
}

看起来这个 $('#queryBuilder').queryBuilder('setRules', decodeURIComponent($("#rules").val()) ); 不是一个有效的初始化方法插件。

如果我尝试以这种方式硬编码规则:

var rules_basic = {
  "condition": "AND",
  "rules": [
    {
      "id": "description",
      "field": "description",
      "type": "string",
      "input": "text",
      "operator": "equal",
      "value": "test value"
    }
  ],
  "valid": true
};

$('#queryBuilder').queryBuilder({
   plugins: ['bt-tooltip-errors'],
   filters: [{
     id: 'description',
     label: 'Description',
     type: 'string'
   }],
   rules: rules_basic 
 });

然后一切正常!

如何强制从动态隐藏输入字段中获取初始化规则？我的 script.js 与 HTML 是分开的，所以我不能(也不想)强制使用 PHP 编写初始规则，例如:

index.php:

.... HTML PART

..... JS PART

$('#queryBuilder').queryBuilder({
   plugins: ['bt-tooltip-errors'],
   filters: [{
     id: 'description',
     label: 'Description',
     type: 'string'
   }],
   rules: <?php echo $rules; ?>    // <---------------- HERE
 });

Answer 1

可能的原因是你得到了一个带有“.val”函数的字符串值，但是插件需要一个JSON对象来设置规则，请尝试在script.js中使用这段代码:

var customRules = decodeURIComponent($("#rules").val());
$('#queryBuilder').queryBuilder('setRules', JSON.parse(customRules) );

而不是这个:

$('#queryBuilder').queryBuilder('setRules', decodeURIComponent($("#rules").val()) );