On 04/08/2015 10:36 PM, Augustus Saunders wrote:

On Apr 8, 2015, at 12:13 PM, Peter Rabbitson <rabbit+d...@rabbit.us> wrote:

I would recommend that you don't refer people to that link, as that's generally 
speaking not how you want to accomplish that particular task.

Please elaborate, also see below.

 It works, but {'column_expr' => $val}} or {'column_expr' => {op => $val}} is 
the more natural and obvious way

... which however is a lie in terms of the API contract - you are telling DBIC "use the column named 'column_expr', nevermind the fact the column doesn't exist". Additionally you are relying on the side-effect of lack of quote_names, in which case most (but not all!) of the machinery does not check a column for existence.

So I could not disagree more with your statement "I would recommend that you don't refer people to that link". This is the one and only place people need to be pointed to when trying to do what the original poster asked.

"but this is ugly in perl" is not a valid argument to drive people away from the only universally correct solution. Please refrain from arguing this further in the context of new code.


If DBIx could expose an alternate structure like:

{
        LHS => \[],
        op => whatever,
        RHS => \[]
}


This has been proposed and couldn't be made to work consistently at the time. However the state of the art moved on, so it may be worth taking another look. Noted.


I understand that you want people to use \[], but I am unclear on why you would 
not want bind to work correctly in the cases it is still required.


It already works correctly... or am I misunderstanding the issue you are having...?

Can you please make a small test case using as a model https://github.com/dbsrgits/dbix-class/blob/current/blead/t/count/group_by_func.t#L12-L21

Please do that *before* spending more time on attempting a fix as you see fit. Because if we do not agree on what needs fixing, your work will end up being discarded, which will be a shame.


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