索引嵌套文档，在请求孩子时回馈父母

Question

我想知道我的代码中是否遗漏了某些内容：

public class Main {

private SolrClient client1;

public void run() {
    client1 = new HttpSolrClient.Builder("http://localhost:8983/solr").build();

    SolrInputDocument doc1 = new SolrInputDocument();

    doc1.addField("id", "1");
    doc1.addField("type_s", "up");
    SolrInputDocument doc2 = new SolrInputDocument();

    doc2.addField("id", "2");
    doc2.addField("type_s", "down");

    doc1.addChildDocument(doc2);

    SolrInputDocument doc4 = new SolrInputDocument();
    doc4.addField("id", "4");
    doc4.addField("type_s", "up");

    SolrInputDocument doc5 = new SolrInputDocument();
    doc5.addField("id", "5");
    doc5.addField("type_s", "down");

    doc4.addChildDocument(doc5);

    try {
        client1.add("techproducts", Arrays.asList(doc1,doc4));
    } catch (Exception e) {
        System.out.println("Indexing failed" + e);
    }
}

如果我使用bin / start start -e techproduct启动Solr 6.3并询问以下内容：

http://localhost:8983/solr/techproducts/select?fl=,[child%20parentFilter=type_s:down]&fq=type_s:down&indent=on&q=:*&wt=json

然后我得到：

{
  "docs": [
    {
      "id": "2",
      "type_s": "down"
    },
    {
      "id": "5",
      "type_s": "down",
      "_childDocuments_": [
        {
          "id": "1",
          "type_s": "up"
        }
      ]
    }
  ]
}

这对我来说似乎是个错误。或者我错过了什么？

请注意，关系＆＃34; 2是1＆＃34;的孩子。和＆＃34; 5是4＆＃34;工作正常。只是我得到额外的（不需要的）关系。