Counter cache on a habtm relation?

Question

Is it possible to use counter cache on a habtm relation in rails 3 ?

I really need it to speed up my application.

score 3 · Accepted Answer · edited May 23 '17 at 11:54

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There is no built in method for HABTM but it is simple to make your own counter cache (actually I was doing it many times before I've invented counter_cache.

Or use has_many :throught instead of HABTM association. I never use HABTM because it looks awkward for me.

Related topic:

counter_cache with has_many :through

edited May 23 '17 at 11:54

Community

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answered Apr 19 '11 at 19:06

fl00r

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The [link](http://stackoverflow.com/questions/5256897/counter-cache-with-has-many-through) did it, thanks! – Linus Oleander Jul 06 '11 at 07:56

score 2 · Answer 2 · answered Mar 27 '13 at 16:11

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For what it's worth, I created a version for HABTM which you can see here.

If you have any questions/comments/suggestions, feel free to leave them - or even fork it and let me see :)

answered Mar 27 '13 at 16:11

marcamillion

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score 0 · Answer 3 · edited Dec 08 '14 at 16:43

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In rails 4, counter_cache for has_and_belongs_to_many relation works great.

edited Dec 08 '14 at 16:43

Scott Solmer

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answered Dec 08 '14 at 15:59

Bogdan Guban

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Any links to support this? I can't get it to work or find any info. – Jeffrey Basurto May 16 '16 at 11:05

Counter cache on a habtm relation?

3 Answers3