Delete all items in DynamoDB table using Ruby

Question

I'm trying to write a simple ruby script that delete all items in a DynamoDB table, but I'm having trouble understand which argument to pass to "delete_items", this is what I have so far:

dynamoDB = Aws::DynamoDB::Resource.new(region: 'us-west-2')

dynamoDB.tables.each do |table|
  puts "Table #{table.name}"
  scan_output = table.scan({
    select: "ALL_ATTRIBUTES"
    })

  scan_output.items.each do |item|
    keys = item.keys
    table.delete_item({
      key: ???
    })
  end
end 

I tried passing the item, or item.keys - both did not work.

Thanks!

Answer 1

I eventually wrote this script which delete all records from all tables (not very useful for most cases, but for mine it was exactly what I needed, as I was using it in a dedicated testing account):

#!/usr/bin/env ruby

require 'aws-sdk'

dynamoDB = Aws::DynamoDB::Resource.new(region: 'us-west-2')

dynamoDB.tables.each do |table|
  puts "Table #{table.name}"
  scan_output = table.scan({
    select: "ALL_ATTRIBUTES"
    })

  scan_output.items.each do |item|
    item_key = Hash.new
    table.key_schema.each do |k|
      item_key[k.attribute_name] = item[k.attribute_name]
    end
    table.delete_item({
      key: item_key
    })
  end
end