Question: Using a variable value in validation tag

[salihzain]

Package version eg. v9, v10:

v10

Issue, Question or Enhancement:

Question: using variables in the validation tag
Suppose I have the following struct:

type Payload struct {
      Quantity int
      Items []Item
}

How do I proceed to do the following validation: len(Items) = Quantity
I tried the following:

      Items []Item `validate:"len=eqfield=Quantity"

and also tried this

    Item []Item `validate:"len=Quantity"`

And have been looking at the Validate.Var and Validate.VarWithValue functions but wondering if there's any neater approach, especially that I'm using translations and don't want to repeat my code.

Thank you so much in advance, Your work is greatly appreciated.

Code sample, to showcase or reproduce:

[huangxingx]

mark, some question