Return info on transaction failure

Author: firx

lib/ex_aws/dynamo.ex

@@ -974,6 +974,7 @@ defmodule ExAws.Dynamo do
       :dynamodb,
       %{
         data: data,
+        error_parser: &error_parser/1,
         headers: [
           {"x-amz-target", "#{@namespace}.#{operation}"},
           {"content-type", "application/x-amz-json-1.0"}
@@ -983,6 +984,16 @@ defmodule ExAws.Dynamo do
     )
   end
 
+  # Cancelled "transactions" are specific to DynamoDB and may include
+  # additional information, so include it in the result:
+  defp error_parser(
+         {:error, {:aws_unhandled, "TransactionCanceledException" = type, message, %{"CancellationReasons" => reasons}}}
+       ) do
+    {:error, {type, message, reasons}}
+  end
+
+  defp error_parser(otherwise), do: otherwise
+
   defp take_opts(map, keys) when is_map(map), do: Map.take(map, keys)
   defp take_opts(keyword, keys) when is_list(keyword), do: Keyword.take(keyword, keys)
 end

mix.exs

@@ -58,7 +58,7 @@ defmodule ExAws.Dynamo.Mixfile do
   defp ex_aws() do
     case System.get_env("AWS") do
       "LOCAL" -> {:ex_aws, path: "../ex_aws"}
-      _ -> {:ex_aws, ">= 2.1.3"}
+      _ -> {:ex_aws, ">= 2.4.0"}
     end
   end
 

mix.lock

@@ -6,7 +6,7 @@
   "earmark": {:hex, :earmark, "1.3.2", "b840562ea3d67795ffbb5bd88940b1bed0ed9fa32834915125ea7d02e35888a5", [:mix], [], "hexpm", "e3be2bc3ae67781db529b80aa7e7c49904a988596e2dbff897425b48b3581161"},
   "earmark_parser": {:hex, :earmark_parser, "1.4.26", "f4291134583f373c7d8755566122908eb9662df4c4b63caa66a0eabe06569b0a", [:mix], [], "hexpm", "48d460899f8a0c52c5470676611c01f64f3337bad0b26ddab43648428d94aabc"},
   "erlex": {:hex, :erlex, "0.2.6", "c7987d15e899c7a2f34f5420d2a2ea0d659682c06ac607572df55a43753aa12e", [:mix], [], "hexpm", "2ed2e25711feb44d52b17d2780eabf998452f6efda104877a3881c2f8c0c0c75"},
-  "ex_aws": {:hex, :ex_aws, "2.3.4", "f22c9a9a8f5afdcf44a824df586954240f71d157cecb1ecfd5665d219f782322", [:mix], [{:configparser_ex, "~> 4.0", [hex: :configparser_ex, repo: "hexpm", optional: true]}, {:hackney, "~> 1.16", [hex: :hackney, repo: "hexpm", optional: true]}, {:jason, "~> 1.1", [hex: :jason, repo: "hexpm", optional: true]}, {:jsx, "~> 2.8 or ~> 3.0", [hex: :jsx, repo: "hexpm", optional: true]}, {:mime, "~> 1.2 or ~> 2.0", [hex: :mime, repo: "hexpm", optional: false]}, {:sweet_xml, "~> 0.7", [hex: :sweet_xml, repo: "hexpm", optional: true]}, {:telemetry, "~> 0.4.3 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "849b77125af5c405d38675de75cdddf5b37a7a6ea3982929a516586e338e0ce8"},
+  "ex_aws": {:hex, :ex_aws, "2.4.0", "f2c978e15145722258513907a9d73ef1d81ed92e76331138d42649ae2b1b6eba", [:mix], [{:configparser_ex, "~> 4.0", [hex: :configparser_ex, repo: "hexpm", optional: true]}, {:hackney, "~> 1.16", [hex: :hackney, repo: "hexpm", optional: true]}, {:jason, "~> 1.1", [hex: :jason, repo: "hexpm", optional: true]}, {:jsx, "~> 2.8 or ~> 3.0", [hex: :jsx, repo: "hexpm", optional: true]}, {:mime, "~> 1.2 or ~> 2.0", [hex: :mime, repo: "hexpm", optional: false]}, {:sweet_xml, "~> 0.7", [hex: :sweet_xml, repo: "hexpm", optional: true]}, {:telemetry, "~> 0.4.3 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "66dd0bacaa4113d372d61d795c22d78af170672384c81ebab97a42edf4128543"},
   "ex_doc": {:hex, :ex_doc, "0.28.5", "3e52a6d2130ce74d096859e477b97080c156d0926701c13870a4e1f752363279", [:mix], [{:earmark_parser, "~> 1.4.19", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_elixir, "~> 0.14", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1", [hex: :makeup_erlang, repo: "hexpm", optional: false]}], "hexpm", "d2c4b07133113e9aa3e9ba27efb9088ba900e9e51caa383919676afdf09ab181"},
   "file_system": {:hex, :file_system, "0.2.10", "fb082005a9cd1711c05b5248710f8826b02d7d1784e7c3451f9c1231d4fc162d", [:mix], [], "hexpm", "41195edbfb562a593726eda3b3e8b103a309b733ad25f3d642ba49696bf715dc"},
   "hackney": {:hex, :hackney, "1.18.1", "f48bf88f521f2a229fc7bae88cf4f85adc9cd9bcf23b5dc8eb6a1788c662c4f6", [:rebar3], [{:certifi, "~>2.9.0", [hex: :certifi, repo: "hexpm", optional: false]}, {:idna, "~>6.1.0", [hex: :idna, repo: "hexpm", optional: false]}, {:metrics, "~>1.0.0", [hex: :metrics, repo: "hexpm", optional: false]}, {:mimerl, "~>1.1", [hex: :mimerl, repo: "hexpm", optional: false]}, {:parse_trans, "3.3.1", [hex: :parse_trans, repo: "hexpm", optional: false]}, {:ssl_verify_fun, "~>1.1.0", [hex: :ssl_verify_fun, repo: "hexpm", optional: false]}, {:unicode_util_compat, "~>0.7.0", [hex: :unicode_util_compat, repo: "hexpm", optional: false]}], "hexpm", "a4ecdaff44297e9b5894ae499e9a070ea1888c84afdd1fd9b7b2bc384950128e"},