This result is a forward only result set, calling rewind() after moving forward is not supported - Zend

Question

In Zend app, I use Zend\\Db\\TableGateway and Zend\\Db\\Sql to retrieve data data from MySQL database as below.

Model -

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Answer 1

Sure, It looks like when we use Mysql and want to iterate $resultSet, this error will happen, b/c Mysqli only does forward-moving result sets (Refer to this post: ZF2 DB Result position forwarded?)

I came across this problem too. But when add following line, it solved:

$resultSet->buffer();

but in this mentioned post, it suggest use following line. I just wonder why, and what's difference of them:

$resultSet->getDataSource()->buffer();