15 lines
973 B
PHP
15 lines
973 B
PHP
If you are coming from relational database background it may be familiar to you
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how many-to-many associations are handled: an additional association table is needed.
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<br \><br \>
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In many-to-many relations the relation between the two components is always an aggregate
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relation and the association table is owned by both ends. For example in the case of users and groups
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when user is being deleted the groups it belongs to are not being deleted and the associations between this user
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and the groups it belongs to are being deleted.
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<br \><br \>
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Sometimes you may not want that association table rows are being deleted when user / group is being deleted. You can override
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this behoviour by setting the relations to association component (in this case Groupuser) explicitly.
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<br \><br \>
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In the following example we have Groups and Users of which relation is defined as
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many-to-many. In this case we also need to define an additional class called Groupuser.
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