Scaling PHP Book: I will teach you to scale PHP to millions of users

Re:Scaling PHP Book: I will teach you to scale PHP to millio... by FuzzyDunlop on Tuesday June 05, 2012 @09:15PM (#4071886)

It could be as simple as the performance loss incurred by an ORM is greater than the benefit of using it. You have PDO with PHP, which can be used quite adequately as an ORM itself (you can fetch a tailored SQL query into a class as opposed to working with basic arrays).

I'd argue that, in some cases, an ORM is only used as a reaction to the separation of concerns. Writing SQL mixes up your languages, so why not try to build that SQL in the language you're working with? Or maybe SQL is considered too difficult.

I quite like having full control over a 'raw' query without requiring an ORM's opinion on how it should be built.

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Re:Scaling PHP Book: I will teach you to scale PHP to millio... by dools on Tuesday June 05, 2012 @11:14PM (#4072217)

PDO doesn't handle mapping of nested relationships, though which is where it falls down when compared to ActiveRecord implementations. For example I want to fetch an author and all of the author's books in a single query then loop over and print out author name, and each book. A standard ActiveRecord ORM will give you an array of authors where each author contains an array of books, where as with PDO you're still left to manually detect a change in author by a change in the primary key which is more complex than just writing a nested for loop.

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Re:Scaling PHP Book: I will teach you to scale PHP to millio... by FuzzyDunlop on Friday June 08, 2012 @06:40PM (#4086482)

Forgive me if I misunderstand, but if you can't pull this off in a single SQL query, then ActiveRecord can't either. It just hides the fact it's performing several queries to get what you want.

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