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Modeling: User's Guide |  |
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You define a primary key like this:
<entity ...>
<primaryKey attributeName='...'/>
...
</entity>
The <primaryKey> tag only has one attribute, attributeName,
which needs to have the same value as one the entity's attributes'
names. We will see how an attribute is described in the next section,
however we can already tell that an attribute used as a primary key is often
defined like:
<attribute name='id' type='int'
isClassProperty='0' isRequired='1'
columnName='ID' externalType='INTEGER'/>
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Modeling: User's Guide | |
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