Allow to set metadata to {:all_except, keys}

lib/logger_json.ex

@@ -221,7 +221,8 @@ defmodule LoggerJSON do
 
   defp configure_metadata([]), do: []
   defp configure_metadata(:all), do: :all
-  defp configure_metadata(metadata) when is_list(metadata), do: Enum.reverse(metadata)
+  defp configure_metadata({:all_except, keys}), do: {:all_except, Enum.reverse(keys)}
+  defp configure_metadata(keys) when is_list(keys), do: Enum.reverse(keys)
 
   defp configure_merge(env, options), do: Keyword.merge(env, options, fn _key, _v1, v2 -> v2 end)
 
@@ -298,6 +299,12 @@ defmodule LoggerJSON do
   # Drops keys that can not or should not be encoded to JSON
   def take_metadata(metadata, keys_or_all, ignored_keys \\ [])
 
+  def take_metadata(metadata, {:all_except, keys}, ignored_keys) do
+    metadata
+    |> Keyword.drop(ignored_keys ++ keys ++ @ignored_metadata_keys)
+    |> Enum.into(%{})
+  end
+
   def take_metadata(metadata, :all, ignored_keys) do
     metadata
     |> Keyword.drop(ignored_keys ++ @ignored_metadata_keys)

mix.exs

@@ -2,7 +2,7 @@ defmodule LoggerJSON.Mixfile do
   use Mix.Project
 
   @source_url "https://github.com/Nebo15/logger_json"
-  @version "5.1.2"
+  @version "5.1.3"
 
   def project do
     [

test/unit/logger_json/formatters/google_cloud_logger_test.exs

@@ -175,6 +175,21 @@ defmodule LoggerJSON.GoogleCloudLoggerTest do
       assert %{"dynamic_metadata" => 5} = log
     end
 
+    test "can be configured to :all_except" do
+      Logger.configure_backend(LoggerJSON, metadata: {:all_except, [:user_id]})
+
+      Logger.metadata(user_id: 11)
+      Logger.metadata(dynamic_metadata: 5)
+
+      log =
+        fn -> Logger.debug("hello") end
+        |> capture_log()
+        |> Jason.decode!()
+
+      refute Map.has_key?(log, "user_id")
+      assert Map.has_key?(log, "dynamic_metadata")
+    end
+
     test "can be empty" do
       Logger.configure_backend(LoggerJSON, metadata: [])