Drop load_database_yaml and fix test

We originally did the whole `load_database_yaml` thing because this test
wasn't cooperating and we needed to finish the namespaced rake tasks for
multiple databases.

However, it turns out that YAML can't eval ERB if you don't tell it it's
ERB so you get Pysch parse errors if you're using multi-line ERB or
ERB with conditionals. It's a hot mess.

After trying a few things and thinking it over we decided that it wasn't
worth bandaiding over, the test needed to be improved. The test was
added in #31135 to test that the env is loaded in these tasks. But it
was blowing up because we were trying to read a database name out of the
configuration - however that's not the purpose of this change. We want
to read environment files in the rake tasks, but not in the config
file.

In this PR we changed the test to test what the PR was actually fixing.
We've also deleted the `load_database_yaml` because it caused more
problems than it was worth. This should fix the issues described in
https://github.com/rails/rails/pull/32274#issuecomment-384161057. We
also had these problems at GitHub.

Co-authored-by: alimi <aibrahim2k2@gmail.com>

1 files changed, 0 insertions, 12 deletions

diff --git a/railties/lib/rails/application/configuration.rb b/railties/lib/rails/application/configuration.rb
index 9eb07219e0..f4cbd2b9d0 100644
--- a/railties/lib/rails/application/configuration.rb
+++ b/railties/lib/rails/application/configuration.rb
@@ -168,18 +168,6 @@ module Rails
         end
       end
 
-      # Loads the database YAML without evaluating ERB.  People seem to
-      # write ERB that makes the database configuration depend on
-      # Rails configuration.  But we want Rails configuration (specifically
-      # `rake` and `rails` tasks) to be generated based on information in
-      # the database yaml, so we need a method that loads the database
-      # yaml *without* the context of the Rails application.
-      def load_database_yaml # :nodoc:
-        path = paths["config/database"].existent.first
-        return {} unless path
-        YAML.load_file(path.to_s)
-      end
-
       # Loads and returns the entire raw configuration of database from
       # values stored in <tt>config/database.yml</tt>.
       def database_configuration