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aws dynamodb query \
--table-name app-config \
--key-condition-expression \
"app_name = :app_name" \
--expression-attribute-values \
"{\":app_name\": {\"S\": \"my_app\"}}" \
--limit 1 --no-scan-index-forward \
| jq -r ".Items[0].my_key.S"

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timestamp=$(date -u +"%Y-%m-%dT%H:%M:%SZ")

aws dynamodb put-item \
--table-name app-config \
--item "{\"app_name\": {\"S\": \"myapp\"}, \"my_key\": {\"S\": \"my_val\"}, \"updated_at\": {\"S\": \"$timestamp\"}}"

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aws dynamodb create-table \
  --table-name app-config \
  --attribute-definitions \
  AttributeName=app_name,AttributeType=S \
  AttributeName=updated_at,AttributeType=S \
  --key-schema \
  AttributeName=app_name,KeyType=HASH \
  AttributeName=updated_at,KeyType=RANGE \
  --provisioned-throughput ReadCapacityUnits=5,WriteCapacityUnits=5

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2016-08-10T17:29:09Z web:20160726130742/060a78c35106 fatal error: concurrent map read and map write
2016-08-10T17:29:09Z web:20160726130742/060a78c35106
2016-08-10T17:29:09Z web:20160726130742/060a78c35106 goroutine 35665 [running]:
2016-08-10T17:29:09Z web:20160726130742/060a78c35106 runtime.throw(0x1131ea0, 0x21)
2016-08-10T17:29:09Z web:20160726130742/060a78c35106 	/usr/local/go/src/runtime/panic.go:547 +0x90 fp=0xc82204bc68 sp=0xc82204bc50
2016-08-10T17:29:09Z web:20160726130742/060a78c35106 runtime.mapaccess1_faststr(0xc0ac40, 0xc821031800, 0xc822042700, 0x20, 0xc8201564b0)
2016-08-10T17:29:09Z web:20160726130742/060a78c35106
2016-08-10T17:29:09Z web:20160726130742/060a78c35106 github.com/convox/rack/api/cache.Get(0x10e71e0, 0x11, 0xc0ebc0, 0xc820435860, 0x0, 0x0)
2016-08-10T17:29:09Z web:20160726130742/060a78c35106 	/go/src/github.com/convox/rack/api/cache/cache.go:43 +0x5bf fp=0xc82204be10 sp=0xc82204bcc8
2016-08-10T17:29:09Z web:20160726130742/060a78c35106 github.com/convox/rack/api/provider/aws.(*AWS

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#!/bin/sh
set -e
if ! grep fluentd /etc/ecs/ecs.config &> /dev/null
then
  echo 'ECS_AVAILABLE_LOGGING_DRIVERS=["json-file","syslog","fluentd"]' >> /etc/ecs/ecs.config
fi

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* Loaded features:

    0 enumerator.so
    1 thread.rb
    2 rational.so
    3 complex.so
    4 /usr/local/lib/ruby/2.3.0/x86_64-linux/enc/encdb.so
    5 /usr/local/lib/ruby/2.3.0/x86_64-linux/enc/trans/transdb.so
    6 /usr/local/lib/ruby/2.3.0/unicode_normalize.rb

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/* font size (cards etc) */
html, body, input, select, textarea {font-size: 13px !important;} /* instead of 14px */

/**************** HEADER *****************/

/* header bar */
#header {background: #2B2B2B !important;}

/* header buttons */
.header-btn.header-notifications, .header-btn.header-boards, 

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en:
  activerecord:
    attributes:
      mything:
        sku: SKU
    errors:
      models:
        mything:
          attributes:
            sku:

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class MyThing < ActiveRecord::Base
  private
  def create_or_update
    super
  rescue ActiveRecord::RecordNotUnique => e
    case e.message
    when /index_mytable_on_sku_unique/
      errors.add(:sku, :taken)
    else
      # This should not happen; we want to know if we forgot to handle some unique constraint

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class AddUniqueConstraintToSkus < ActiveRecord::Migration
  disable_ddl_transaction!

  def up
    # code to de-dupe the table, if needed in real time. If these are rare and it takes a long time to fix, you can run it as a separate job prior to this migration
    connection.execute("CREATE UNIQUE INDEX CONCURRENTLY index_mytable_on_sku_unique ON mytable(lower(sku),user_id) where deleted_at is null;")
  end

  def down
    connection.execute("DROP INDEX CONCURRENTLY IF EXISTS index_mytable_on_sku_unique;")