Mongoid : Array contains element or is empty

Question

I want to make a request which returns elements from my collection if a string is in an array or if the array is empty. I tried the following:

Collection.all_of(or: [{ assets: my_asset }, { assets: [] } ])

But this doesn't work.

This works but not for the empty arrays:

Collection.where(assets: my_asset)

a14m · Accepted Answer · 2014-04-08 03:06:56Z

5

I prefer using

Collection.where(:assets.in => [[], my_asset])

answered Apr 8, 2014 at 3:06

a14m

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Comments

Teguh Syahmar · Accepted Answer · 2014-04-07 12:15:05Z

2

try using any_of

Collection.any_of({ assets: my_asset }, { assets: [] })

answered Apr 7, 2014 at 12:15

Teguh Syahmar

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