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[BUG] docker compose images --format json is now a map and no longer a list #12916
Description
Description
Until recently, docker compose images --format json resulted in a list of JSON objects, with one image per JSON object. Now docker compose images --format json results in a map that maps image names to the image JSON object.
I think this got introduced in 2.37.0, since this wasn't the case in 2.36.2.
Since this isn't mentioned in the changelog (neither as a breaking change or as anything else), I guess this is a bug.
Steps To Reproduce
Run docker compose images --format json.
Compose Version
2.37.0
Docker Environment
doesn't matter
Anything else?
No response
Activity
felixfontein commentedon Jun 7, 2025
This breaking change was introduced in eb3074b / #12856.
felixfontein commentedon Jun 7, 2025
The new JSON output no longer contains the
ContainerNamefield. The restored output from #12917 contains it.felixfontein commentedon Jun 14, 2025
Hmm, apparently I mislooked, the
ContainerNamefield isn't there. I created a new issue for this: #12940.