3 replies

Enforce each item is unique in attribute array

Hi, is there a way to set a constraint on this array attribute, that enforces each item to be unique?

For example it should not allow

[:en, :en]

[:en, :en]

attribute :languages, {:array, :atom} do
    default [:en]
    constraints [
      min_length: 1,
      items: [
        one_of: [:en, :de, :fr],
      ]
    ]
  end

attribute :languages, {:array, :atom} do
    default [:en]
    constraints [
      min_length: 1,
      items: [
        one_of: [:en, :de, :fr],
      ]
    ]
  end

Thanks in advance!

Enforce each item is unique in attribute array

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