来自父实体的 Solr 变量未在子实体中设置

Question

我遇到了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。下面是我的 bd-data-config.xml 的一部分（出于安全目的，一些代码已经 modified/stripped）

<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，它运行正常。在 Web Admin 界面和日志中都没有报告错误，尽管这很奇怪。 process_postgresql 的主题被编入索引，而 process_oracle 的主题没有。这是一小部分输出查询。

{
  "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，postgresql 的主题已被索引，而oracle 的主题则没有。当我检查日志时（运行在调试模式下）我注意到了这一点：

2020-03-13 11:52:47.085 DEBUG (Thread-33) [ ] o.a.s.h.d.JdbcDataSource Executing SQL: select distinct sub.subject from tb_subject sub , tb_process_subject prc_sub 其中 sub.id_subject = prc_sub.id_subject 和 prc_sub.id_process =
...
2020-03-13 11:52:47.953 DEBUG (Thread-33) [ ] o.a.s.h.d.JdbcDataSource Executing SQL: select distinct sub.subject from tb_subject sub , tb_process_subject prc_sub 其中 sub.id_subject = prc_sub.id_subject 和 prc_sub.id_process = 12

如您所见，问题是变量${process_oracle.process_id}没有设置，同时变量${process_postgresql.process_id} 运行没问题。

有人知道为什么会这样吗？

此致

Answer 1

几天后，我解决了这个问题。变量必须大写。所以它一定是这样的：

<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。

来自父实体的 Solr 变量未在子实体中设置

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