find_primary_key(o)private
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# File activerecord/lib/arel/visitors/mssql.rb, line 148
def find_primary_key(o)
@primary_keys[o.name] ||= begin
primary_key_name = @connection.primary_key(o.name)
# some tables might be without primary key
primary_key_name && o[primary_key_name]
end
end