This would be particularly useful for me at the moment. I am trying to figure out the best way to validate all child objects inside an array.

I have an object that looks something like this:

{
  jobs:[
    {
      key: value
    },
    {
      key: value,
      anotherKey: 'anotherValue'
    },
    {
      invalidKey: false
    }
  ]
}

Just brainstorming syntax I was figuring something like this...

jobs: {
  presence: true,
  length: {
    minimum: 1,
    maximum: 5
  }
  // maybe this only supports arrays?
  each: {
    key: {
      presence: {
        message: 'is required!'
      }
    },
    anotherKey: {
      datetime: true
    }
  }
}

Also clean attributes would have to be updated to toss invalidKey from the 3rd item in the job object as it is not defined in the constraints under each.

Thoughts?

Any idea when this is going out? Must say this is much needed feature.

You could do something like this: https://stackoverflow.com/a/51406790/2847302