Search through array of objects by hash in ruby

where_in_ruby.rb

class ItemCollection
  def where(data)
    items.select do |item|
      item.fetch(data.keys.first) == data.values.first.to_s
    end.map { |item| Item.new(item) }
  end
end

item_collection = ItemCollection.new
item_collection.where({merchant_id: 2})
=> [<Item>, <Item>]