Description
Knowledge of the root location is important since it can be a starting point for API queries, or even links to home page, but as eZ Platform can be used for multisite development, the root location can vary.
By default, the root location ID is 2, but as it can be easily be changed by configuration, the best practice is to retrieve it dynamically.
Retrieving root location ID
Root location ID can be retrieved easily from ConfigResolver. The parameter name is content.tree_root.location_id.
In a controller
Retrieving the root location
From a template
Root location is exposed in the global Twig helper.
Making a link to homepage
From a controller