On 12/22/2011 11:20 AM, Dmitri Snytkine wrote:
> Not sure what you mean by json wrapped.
> In mongo you do $coll->find(array('age' => $age);
>
> if $age is a string '21' your will not get any erros but neither will you
> get any results.
It is json underneath, but in your find() example, obviously the right
approach here is to do:
$coll->find(array('age' => (int)$age);
How is that hard?
You wouldn't use a strong int type in the find() function prototype here
at all since by definition the find() function needs to take all sorts
of types. This is why I mentioned access functions related to Mongo. You
might write something like:
function age_lookup($age) {
return $coll->find(array('age' => (int)$age);
}
but again here, doing a strong type check on the parameter isn't making
your life easier. It simply pushes the responsibility to the caller and
introduces a tricky unrecoverable error that will drive you crazy unless
you have 100% regression test coverage (which is kind of impossible
since the number of inputs is infinite) or great static analysis tools.
PHP is not a compiled language, so you end up not catching these until
runtime which is obviously sub-optimal.
-Rasmus
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