method
primary_key
primary_key(table_name)
public
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# File activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb, line 416 def primary_key(table_name) #:nodoc: pks = table_structure(table_name).select { |f| f['pk'] > 0 } return nil unless pks.count == 1 pks[0]['name'] end