#primary_key(name, type = :primary_key, **options)
Appends a primary key definition to the table definition. Can be called multiple times, but this is probably not a good idea.
# File 'activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb', line 305
def primary_key(name, type = :primary_key, ** ) column(name, type, ** .merge(primary_key: true)) end