我正在为 SOLR 和 SQL 数据导入而苦苦挣扎。我需要索引来自 2 个表的数据,第一个是“masters”,第二个是“details”。这两个表之间的关系是 1 对 n 的,它由两个表上的列 m_id 强制执行:
CREATE TABLE "masters" (m_id NUMBER(10),
m_code VARCHAR2(100 CHAR),
m_description VARCHAR2(1000 CHAR),
PRIMARY KEY (m_id));
CREATE TABLE "details" (d_id NUMBER(10),
s_code VARCHAR2(100 CHAR),
s_description VARCHAR2(1000 CHAR),
m_id NUMBER(10),
PRIMARY KEY (d_id),
CONSTRAINT fk_details_masters FOREIGN KEY (m_id) REFERENCES "masters"(m_id));
我希望“masters”表中的每一行都有一个索引文档,每个文档都应该包含“details”表的数组。
我在脑海中预想的结果是这样的:
master = {
"ID": "1"
"m_code": "master53",
"m_description": "John Doe",
"details": [
{
"d_code": "detail001",
"d_description": "Shirts"
},
{
"d_code": "detail002",
"d_description": "Shoes"
},
{
"d_code": "detail003",
"d_description": "hats"
}
]
}
但我只能产生这样的东西:
master = {
"ID": "1",
"m_code": "master53",
"m_description": "John Doe",
"d_code": ["detail001","detail002","detail003"],
"d_description": ["Shirts","Shoes","hats"]
}
使用这样的配置:
<dataConfig>
<dataSource type="JdbcDataSource"
driver="oracle.jdbc.driver.OracleDriver"
url="jdbc:oracle:thin:@//dora64svil.icc.crifnet.com:1521/cbrisvil.dbcrif.net"
user="CBBTC"
password="w4.gJ6Qf1p7Z_i4qFp3W_d"/>
<document>
<entity name="master" rootEntity="True"
query="SELECT m_id, m_code, m_description from master">
<field column="m_id" name="ID"/>
<field column="m_code" name="m_code_s"/>
<field column="m_description" name="m_description_s"/>
<entity name="details" rootEntity="False"
query="SELECT d_code, d_description from details where = m_id '${master.m_id}'">
<field column="d_code" name="d_code_ss"/>
<field column="d_description" name="d_description_ss"/>
</entity>
</entity>
</document>
</dataConfig>
我在配置和 schema.xml 字段定义方面玩了很多,但我找不到正确的方法。(存在字段后缀“_s”和“_ss”只是为了将正确的字段类型触发到架构中)
我想我想做的是给嵌套实体一个“名字”,错误在哪里?我在概念上试图做错什么吗?