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I've created a custom entity and having trouble providing proper caching.
When you create custom entity, by default it has only one cache tag entity_type:id.
Problem is, I need to display same entity to different users (by role) in a different way.
So I think I need cache tags, such as entity_type:id:user_role? How do I go with this?
To add a cache dependency on user roles you don't need a cache tag, but a cache context user.roles.
However, you rarely need this context, because there is already a default render context for the hashed user permissions user.permissions, set in the container variable required_cache_contexts, which is applied on all render arrays:
default.services.yml:
parameters:
renderer.config:
# Renderer required cache contexts:
#
# The Renderer will automatically associate these cache contexts with every
# render array, hence varying every render array by these cache contexts.
#
# @default ['languages:language_interface', 'theme', 'user.permissions']
required_cache_contexts: ['languages:language_interface', 'theme', 'user.permissions']
