db:test:clone and prepare must load environment

db:test:clone and db:test:prepare use
ActiveRecord::Base. configurations, so we need to load the rails
environment, otherwise the config wont be in place.

activerecord/CHANGELOG.md

@@ -1,3 +1,10 @@
+*   db:test:clone and db:test:prepare must load Rails environment
+
+    db:test:clone and db:test:prepare use ActiveRecord::Base. configurations,
+    so we need to load the rails environment, otherwise the config wont be in place.
+
+    *arthurnn*
+
 *   Create a whitelist of delegable methods to `Array`.
 
     Currently `Relation` directly delegates methods to `Array`. With this change,

activerecord/lib/active_record/railties/databases.rake

@@ -343,7 +343,7 @@ db_namespace = namespace :db do
     end
 
     # desc "Recreate the test database from a fresh schema"
-    task :clone do
+    task :clone => :environment do
       case ActiveRecord::Base.schema_format
         when :ruby
           db_namespace["test:clone_schema"].invoke
@@ -364,7 +364,7 @@ db_namespace = namespace :db do
     end
 
     # desc 'Check for pending migrations and load the test schema'
-    task :prepare => :load_config do
+    task :prepare => [:environment, :load_config] do
       unless ActiveRecord::Base.configurations.blank?
         db_namespace['test:load'].invoke
       end
@@ -401,4 +401,3 @@ namespace :railties do
 end
 
 task 'test:prepare' => ['db:test:prepare', 'db:test:load', 'db:abort_if_pending_migrations']
-