How to join a table and count records in Rails 3?

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难免孤独
难免孤独 2021-02-07 10:13

I have a Collection class which has many coins. I am trying to select collections which have more than two coins. Currently, I have no problem doing that through st

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  •  情话喂你
    2021-02-07 11:10

    Add counter_cache columns and query them.

    http://railscasts.com/episodes/23-counter-cache-column

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