ruby mysql2 equivalent of data_seek(n).fetch_hash -


what equivalent statement in mysql2 this

result = mysql.query('select cache_amount_with_discount_and_tax t_payment organization_id = 1 , receipt_id = '+param['receipt_id'].to_s).data_seek(3).fetch_hash  // mysql original mysql client

i'm new ruby , still trying wrap ahead around documentation.

i don't think mysql2 supports data_seek, can use sql native offset, better since limits amount transfered client in first place. mysql2 returns rows hashes default, that's non-issue. so...

sql = <<-sql   select cache_amount_with_discount_and_tax   t_payment   organization_id = 1     , receipt_id = #{client.escape(param['receipt_id'])}   limit 1 offset 3 sql result = client.query(sql, as: :hash, symbolize_keys: false) hash_row = result.first

the options have given (as: :hash, symbolize_keys: false) default, , can left off unless have changed defaults; or can mess them customise result (e.g. having symbolic column keys instead of strings).

also, note client.escape bit. never, ever, feed raw user input sql statement, or bobby tables might next client.

even better using abstraction library provides prepared statement , parameter binding support, sequel.


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