# Using field's filterable option
field :tags,
  as: :tags,
  filterable: {
    # ...
    suggestions: -> {
      [
        {
          value: 1,
          label: 'one', # or params[:something]
          avatar: 'https://images.unsplash.com/photo-1560363199-a1264d4ea5fc?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&w=256&h=256&fit=crop',
        },
        # ...
      ]
    }
    # ...
  }