Ruby on Rails Friday, May 27, 2016

You have to add an index column and use order by. SQL as a standard does not guarantee any ordering unless you enforce it, so any implementation can return elements in the order that is most efficient.


Zdravko Balorda <lists@ruby-forum.com> schrieb am Fr., 27. Mai 2016 15:53:
Yes. So how one can handle arrays properly?

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Ruby on Rails

Yes. So how one can handle arrays properly?

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Ruby on Rails

Has many does not resemble an array but a set.


Zdravko Balorda <lists@ruby-forum.com> schrieb am Fr., 27. Mai 2016 15:20:
The way to implement arrays in ActiveRecord is via has_many.
But, normally Ruby arrays keep the order of elements, while has_many do
not.
This is not just a matter of "order by" clause.
At every update one needs to index database table rows properly, so that
"order by" would work.

Thanks in advance.

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