standardize database_configuration to a hash

make connection_url_to_hash a class method

This als prevents loading database.yml if it doesn't exist
but DATABASE_URL does

1 files changed, 6 insertions, 2 deletions

diff --git a/railties/lib/rails/application/configuration.rb b/railties/lib/rails/application/configuration.rb
index 2c7ddd86e7..1b88b834c7 100644
--- a/railties/lib/rails/application/configuration.rb
+++ b/railties/lib/rails/application/configuration.rb
@@ -101,8 +101,12 @@ module Rails
       # contents of the file are processed via ERB before being sent through
       # YAML::load.
       def database_configuration
-        require 'erb'
-        YAML.load ERB.new(IO.read(paths["config/database"].first)).result
+        if ENV['DATABASE_URL']
+          {Rails.env => ActiveRecord::ConnectionAdapters::ConnectionSpecification::Resolver.connection_url_to_hash(ENV['DATABASE_URL']).stringify_keys}
+        else
+          require 'erb'
+          YAML.load ERB.new(IO.read(paths["config/database"].first)).result
+        end
       rescue Psych::SyntaxError => e
         raise "YAML syntax error occurred while parsing #{paths["config/database"].first}. " \
               "Please note that YAML must be consistently indented using spaces. Tabs are not allowed. " \