Each component id has it's own unique id, you can get it using
$data->componentId and query by component id using
Those ids are hierarchical, meaning each level in the tree will add an additional separated by
'_' separator means page child component
'-' separator means any other child component (plain, box, pseudo page)
There is however one exception: pages as created in the site tree admin (and stored in kwf_pages) start from scratch! That means the component id of such a page is eg. just '123'.
In the example above you see that page 1, 2 and 3 all start their id from scratch even though 3 is below 1.
Why this exception?
- It shortens most ids
- it makes it possible to move page to another page without changing it's id
Expanded Ids don't use this exception, they always start with 'root'. Usually you don't need to work with this kind of id.
dbIds (Database Ids)
These Ids are used for two reasons:
- Shorter, easier to work with ids in database
- Possible to use a fixed id in admin
- Usage of the same content in multiple components (with different componentId but the same dbId)