Ruby on Rails

I have changed the primary key on a table "statuses" to now be
entity_id

In my status model I have:

self.primary_key = 'entity_id'

when I try to render a collection of comments associated with a status
like so:

<%= render @comments %>

I get this error:

PG::UndefinedColumn: ERROR: column comments.status_id does not exist
LINE 1: SELECT "comments".* FROM "comments" WHERE "comments"."status_id"

I'm assuming when the above call is constructed by rails it is assuming
the table statuses has primary key status.id by convention..

so – is it no longer possible to use the render functionality as above?
Or have I missed something which I need to make this work?

How can I get rails to use entity_id instead of the now changed
status_id?

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