未在子实体中设置的父实体的Solr变量

Question

我面临一个非常奇怪的问题。这是我的情况。我的文档由2个实体组成，每个实体来自不同的数据库。以下是我的bd-data-config.xml的一部分（出于安全目的已对某些代码进行了修改/剥离）

<document>
  <entity name="process_oracle" datasource="oracle" query="
    select 'oracle-' || p.process_id as id, p.process_id from tb_process p">
    <field column="process_id" name="process_id"/>
    
    <entity name="subject" datasource="oracle" query="
      select distinct sub.subject
      from tb_subject sub, tb_process_subject prc_sub
      where sub.id_subject = prc_sub.id_subject
        and prc_sub.id_process = ${process_oracle.process_id}">
      <field column="subject" name="subject"/>
    </entity>
  </entity>

  <entity name="process_postgresql" datasource="postgresql" query="
    select 'postgresql-' || p.process_id as id, p.process_id from tb_process p">
    <field column="process_id" name="process_id"/>
    
    <entity name="subject" datasource="postgresql" query="
      select distinct sub.subject
      from tb_subject sub, tb_process_subject prc_sub
      where sub.id_subject = prc_sub.id_subject
        and prc_sub.id_process = ${process_postgresql.process_id}">
      <field column="subject" name="subject"/>
    </entity>
  </entity>
</document>

当我执行导入时，它将正常运行。尽管在Web Admin界面或日志中都未报告错误，但这是很奇怪的事情。虽然索引了process_postgresql的主题，但未索引process_oracle的主题。这里是输出查询的一小部分。

{
  "responseHeader":{
    "status":0,
    "QTime":0,
    "params":{
      "q":"*:*",
      "_":"1583958908786"}},
  "response":{"numFound":7,"start":0,"docs":[
      {
        "process_id":"oracle-1"
      },
...
      {
        "process_id":"postgresql-12",
        "subject":["subject1", "subject2"]
      }
  }
}

如您所见，来自PostgreSQL的主题被索引，而来自oracle的主题未被索引。当我检查日志（以调试模式运行）时，我注意到了：

2020-03-13 11：52：47.085调试（Thread-33）[] o.a.s.h.d.JdbcDataSource执行SQL：从tb_subject子对象，tb_process_subject prc_sub中选择不同的sub.subject，其中sub.id_subject = prc_sub.id_subject和prc_sub.id_process =...2020-03-13 11：52：47.953调试（Thread-33）[] o.a.s.h.d.JdbcDataSource执行SQL：从tb_subject子对象，tb_process_subject prc_sub中选择不同的sub.subject，其中sub.id_subject = prc_sub.id_subject和prc_sub.id_process = 12

如您所见，问题在于未设置变量$ {process_oracle.process_id}，而变量$ {process_postgresql.process_id}运行得很好。

有人知道为什么会这样吗？

最佳问候

Answer 1

几天后，我可以解决问题。该变量必须为大写。因此它必须看起来像这样：

<document>
  <entity name="process_oracle" datasource="oracle" query="
    select 'oracle-' || p.process_id as id, p.process_id from tb_process p">
    <field column="process_id" name="process_id"/>
    
    <entity name="subject" datasource="oracle" query="
      select distinct sub.subject
      from tb_subject sub, tb_process_subject prc_sub
      where sub.id_subject = prc_sub.id_subject
        and prc_sub.id_process = ${process_oracle.PROCESS_ID}">
      <field column="subject" name="subject"/>
    </entity>
  </entity>

  <entity name="process_postgresql" datasource="postgresql" query="
    select 'postgresql-' || p.process_id as id, p.process_id from tb_process p">
    <field column="process_id" name="process_id"/>
    
    <entity name="subject" datasource="postgresql" query="
      select distinct sub.subject
      from tb_subject sub, tb_process_subject prc_sub
      where sub.id_subject = prc_sub.id_subject
        and prc_sub.id_process = ${process_postgresql.PROCESS_ID}">
      <field column="subject" name="subject"/>
    </entity>
  </entity>
</document>

就是这样。就这么简单。