Thank you so much for your help. Based on the same schema in my first post
and your help I created this, have I implemented it correctly based on your
suggestion? I tried to comment it:
<dataConfig>
<dataSource name="app-ds" driver="org.postgresql.Driver"
url="jdbc:postgresql://localhost:5432/wikipedia" user="wikipedia"
password="secret" />
<document>
<entity dataSource="app-ds" name="item" query="SELECT id, title,
description, date, link, location_id, source_id, company_id from item">
<entity dataSource="app-ds" name="location" query="SELECT name,
coordinate
from location where location_id=${item.location_id}">
<entity dataSource="app-ds" name="source" query="SELECT name
from source
where source_id=${item.source_id}">
<entity dataSource="app-ds" name="company" query="SELECT name
from company
where company_id=${item.company_id}">
<field column="id" name="id" />
<field column="title" name="title" />
<field column="description" name="description" />
<field column="date" name="date" />
<field column="link" name="link" />
<field column="name" name="company_name" />
<field column="name" name="source_name" />
<field column="name" name="location_name" />
<field column="coordinate" name="location_coordinates"
/>
</entity>
</entity>
</document>
</dataConfig>
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