Indexing 创建嵌套索引结构SOLR

我想用SOLR导入处理程序创建嵌套索引结构。我使用的是Solr-7.2，我已经创建了data config.xml
（）

---

}}`

导入的文档（即索引文档中的实际文档）是什么样子的？@MatsLindh添加了导入的文档结构。请查收。

<document>
        <entity name="PARENT" query="select * from parent">
          <field column="id" />
          <field column="title" />
          <field column="type_s" />
          <entity child="true" name="CHILD" query="select * from child where 
           parent_id='${PARENT.id}'">
                <field column="id" />
                <field column="post" />
                    <field column="parent_id" />
          </entity>
    </entity>   
 </document>

` "response":{"numFound":6,"start":0,"docs":[
  {
    "post":"dev1",
    "parent_id":"1",
    "id":"1",
    "_version_":1608402260456374272},
  {
    "post":"dev3",
    "parent_id":"1",
    "id":"3",
    "_version_":1608402260456374272},
  {
    "id":"1",
    "title":"test1",
    "_version_":1608402260456374272},
  {
    "post":"dev2",
    "parent_id":"2",
    "id":"2",
    "_version_":1608402260460568576},
  {
    "post":"dev4",
    "parent_id":"4",
    "id":"4",
    "_version_":1608402260460568576},
  {
    "id":"2",
    "title":"test2",
    "_version_":1608402260460568576}]