Merge pull request #15015 from pothibo/database-configuration

Use Rails::Paths::Path#existent in database_configuration

railties/CHANGELOG.md

@@ -1,3 +1,8 @@
+*   Load database configuration from the first
+    database.yml available in paths.
+
+    *Pier-Olivier Thibault*
+
 *   Reading name and email from git for plugin gemspec.
 
     Fixes #9589.

railties/lib/rails/application/configuration.rb

@@ -92,7 +92,7 @@ module Rails
       # Loads and returns the entire raw configuration of database from
       # values stored in `config/database.yml`.
       def database_configuration
-        yaml = Pathname.new(paths["config/database"].first || "")
+        yaml = Pathname.new(paths["config/database"].existent.first || "")
 
         config = if yaml.exist?
           require "yaml"

railties/test/application/configuration_test.rb

@@ -879,5 +879,21 @@ module ApplicationTests
       Rails.application.load_runner
       assert $ran_block
     end
+
+    test "loading the first existing database configuration available" do
+      app_file 'config/environments/development.rb', <<-RUBY
+
+      Rails.application.configure do
+        config.paths.add 'config/database', with: 'config/nonexistant.yml'
+        config.paths['config/database'] << 'config/database.yml'
+        end
+      RUBY
+
+      require "#{app_path}/config/environment"
+
+      db_config =  Rails.application.config.database_configuration
+
+      assert db_config.is_a?(Hash)
+    end
   end
 end