How would you do a find on two different models and sort both in one array by created_at column

Question

So for example ...
Lets say I have a Posts model and a News model, that are essentially the same thing (structure wise)
columns are
* title
* content
* createdat
* updatedat

The client has requested showing both news and Posts on the same page interleaved and sorted by created_at date ...
Does anyone know how I would go about doing something like this?

score 2 · Accepted Answer · answered Oct 31 '09 at 14:28

2

(Post.all + News.all).sort_by(&:created_at)

answered Oct 31 '09 at 14:28

cwninja

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I want to be like you when I grow up. – concept47 Oct 31 '09 at 20:22
(Post.all + News.all).sort_by(&:created_at).reverse to have it sort with the latest items first ... just in case anyone else is following this. – concept47 Oct 31 '09 at 20:23

score 0 · Answer 2 · answered Jul 19 '13 at 06:21

Just a warning, cwninja's answer will be really slow with large datasets because it requires pulling ALL of the members out of the database and then running a sort on them.

I would rarely suggest raw SQL, but in this case I can't think of a better way.

How would you do a find on two different models and sort both in one array by created_at column

2 Answers2

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