Start using message attribute instead of log for binary messages

Data from message is used to build a nicer view for log messages in 
Stackdriver UI. Closes #14.

Author: AndrewDryga

lib/logger_json/formatters/google_cloud_logger.ex

@@ -30,7 +30,7 @@ defmodule LoggerJSON.Formatters.GoogleCloudLogger do
         %{
           time: format_timestamp(ts),
           severity: unquote(gcp_level),
-          log: IO.iodata_to_binary(msg)
+          message: IO.iodata_to_binary(msg)
         },
         format_metadata(md, md_keys)
       )
@@ -42,7 +42,7 @@ defmodule LoggerJSON.Formatters.GoogleCloudLogger do
       %{
         time: format_timestamp(ts),
         severity: "DEFAULT",
-        log: IO.iodata_to_binary(msg)
+        message: IO.iodata_to_binary(msg)
       },
       format_metadata(md, md_keys)
     )

mix.exs

@@ -1,7 +1,7 @@
 defmodule LoggerJSON.Mixfile do
   use Mix.Project
 
-  @version "3.1.2"
+  @version "3.2.0"
 
   def project do
     [

test/unit/logger_json/ecto_test.exs

@@ -33,7 +33,7 @@ defmodule LoggerJSON.EctoTest do
       end)
 
     assert %{
-             "log" => "done",
+             "message" => "done",
              "query" => %{
                "decode_time_μs" => 500,
                "latency_μs" => 2700,
@@ -53,7 +53,7 @@ defmodule LoggerJSON.EctoTest do
       end)
 
     assert %{
-             "log" => "done",
+             "message" => "done",
              "query" => %{
                "decode_time_μs" => 500,
                "latency_μs" => 2700,
@@ -95,7 +95,7 @@ defmodule LoggerJSON.EctoTest do
       end)
 
     assert %{
-             "log" => "begin",
+             "message" => "begin",
              "query" => %{
                "latency_μs" => 3036,
                "execution_time_μs" => 2930,

test/unit/logger_json/plug_test.exs

@@ -33,7 +33,7 @@ defmodule LoggerJSON.PlugTest do
       end)
 
     assert %{
-             "log" => "",
+             "message" => "",
              "httpRequest" => %{
                "latency" => latency,
                "referer" => nil,

test/unit/logger_json_test.exs

@@ -41,7 +41,7 @@ defmodule LoggerJSONTest do
       |> capture_log()
       |> Jason.decode!()
 
-    assert %{"log" => ""} = log
+    assert %{"message" => ""} = log
   end
 
   test "logs binary messages" do
@@ -52,7 +52,7 @@ defmodule LoggerJSONTest do
       |> capture_log()
       |> Jason.decode!()
 
-    assert %{"log" => "hello"} = log
+    assert %{"message" => "hello"} = log
   end
 
   test "logs empty iodata messages" do
@@ -63,7 +63,7 @@ defmodule LoggerJSONTest do
       |> capture_log()
       |> Jason.decode!()
 
-    assert %{"log" => ""} = log
+    assert %{"message" => ""} = log
   end
 
   test "logs iodata messages" do
@@ -74,7 +74,7 @@ defmodule LoggerJSONTest do
       |> capture_log()
       |> Jason.decode!()
 
-    assert %{"log" => "hello"} = log
+    assert %{"message" => "hello"} = log
   end
 
   test "log message does not break escaping" do
@@ -85,14 +85,14 @@ defmodule LoggerJSONTest do
       |> capture_log()
       |> Jason.decode!()
 
-    assert %{"log" => "\"h"} = log
+    assert %{"message" => "\"h"} = log
 
     log =
       fn -> Logger.debug("\"h") end
       |> capture_log()
       |> Jason.decode!()
 
-    assert %{"log" => "\"h"} = log
+    assert %{"message" => "\"h"} = log
   end
 
   test "does not start when there is no user" do
@@ -160,7 +160,7 @@ defmodule LoggerJSONTest do
         |> capture_log()
         |> Jason.decode!()
 
-      assert %{"log" => "hello"} = log
+      assert %{"message" => "hello"} = log
     end
   end