Explain for contains function

[mexoboy]

Hi. I have yaml config with servers. And I need find servers with specific tag. I use contains for that, but I have some unexpected result:

servers:
  - name: server-1
    tags:
      - foo
  - name: server-2
    tags:
      - bar
  - name: server-3
    tags:
      - foo
      - bar

I run command for tag "foo" and receive correct values, which I expected:

# yq e '.servers[] | select(.tags[] | contains("foo")) | .name' test.yaml
server-1
server-3

But it didn't work for tag bar:

# yq e '.servers[] | select(.tags[] | contains("bar")) | .name' test.yaml
server-2

Could you please explain how it's work and how I can change my query for take expected result?

[mikefarah]

Actually what you have should work - you found a bug!

I've raised one on your behalf: #958 and will have a fix shortly in the next release.

[mexoboy]

Thanks for fast response!

[mikefarah]

NP - Fixed in 4.13.4