Question

我正在使用Spring-Data-Solr，我有三个表并尝试从这些表中获取所有数据。这是表格的关系：

车牌表：

      ID, NAME, PRICE, DISTRICT_ID(FK), CITY_ID(FK)

地区表：

      ID(PK), DISTRICT_NAME

城市表：

      ID(PK), CITY_NAME

在data-config.xml中的

我尝试使用sql获取Car表中的所有数据和记录：

<dataConfig>
<dataSource driver="org.hsqldb.jdbcDriver" url="jdbc:hsqldb:/temp/example/ex" user="sa" />
<document>
    <entity name="city" query="select * from city">
        <field column="id" name="city_id" />
        <field column="name" name="city_name" />

        <entity name="cars" query="select * from cars where city_id='${city.id}'">
                <field column="id" name="id" />
                <field column="name" name="name" />
            <entity name="district" query="select * from district where id = '${cars.district_id}'">
                <field column="id" name="district_id" />
                <field column="name" name="district_name" />
            </entity>
        </entity>
    </entity>
</document>

当我在Solr Admin上执行时，我刚收到2条记录，尽管在我的汽车表中有11条记录。

如何获得Car table中的所有（11条记录）？感谢

Answer 1

<dataConfig>
<dataSource driver="org.hsqldb.jdbcDriver"  url="jdbc:hsqldb:/temp/example/ex" user="sa" />
<document>
<entity name="city" query="select City.city_id ,City.city_name ,car.id ,car.name ,District.id  from Car join City on city.id = car.CITY_ID join District on car.DISTRICT_ID = District.id ">
    <field column="cityid" name="City.city_id" />
    <field column="cityname" name="City.city_name" />
    <field column="carid" name="car.id" />
    <field column="carname" name="car.name" />
    <field column="Districtid" name="District.id" />
    <etc... any column you need>


</entity>
</document>

修改

或者您可以在视图中执行查询[ TempView ] AND配置

<entity name="city" query="select * from TempView "> <field column="cityid" name="City.city_id" /> <field column="cityname" name="City.city_name" /> <field column="carid" name="car.id" /> <field column="carname" name="car.name" /> <field column="Districtid" name="District.id" /> <etc... any column you need> </entity> </document>

如何从Solr的data-config中的多表中获取数据

1 个答案: