Extract method to the DatabaseTasks class

It make easier to find and elimite duplication inside that class.

activerecord/lib/active_record/railties/databases.rake

@@ -354,36 +354,7 @@ db_namespace = namespace :db do
 
   desc "Runs setup if database does not exist, or runs migrations if it does"
   task prepare: :load_config do
-    seed = false
+    ActiveRecord::Tasks::DatabaseTasks.prepare_all
-
-    ActiveRecord::Base.configurations.configs_for(env_name: ActiveRecord::Tasks::DatabaseTasks.env).each do |db_config|
-      ActiveRecord::Base.establish_connection(db_config)
-
-      # Skipped when no database
-      ActiveRecord::Tasks::DatabaseTasks.migrate
-
-      if ActiveRecord::Base.dump_schema_after_migration
-        ActiveRecord::Tasks::DatabaseTasks.dump_schema(db_config, ActiveRecord::Base.schema_format)
-      end
-    rescue ActiveRecord::NoDatabaseError
-      config_name = db_config.name
-      ActiveRecord::Tasks::DatabaseTasks.create_current(db_config.env_name, config_name)
-
-      if File.exist?(ActiveRecord::Tasks::DatabaseTasks.dump_filename(config_name))
-        ActiveRecord::Tasks::DatabaseTasks.load_schema(
-          db_config,
-          ActiveRecord::Base.schema_format,
-          nil
-        )
-      else
-        ActiveRecord::Tasks::DatabaseTasks.migrate
-      end
-
-      seed = true
-    end
-
-    ActiveRecord::Base.establish_connection
-    ActiveRecord::Tasks::DatabaseTasks.load_seed if seed
   end
 
   desc "Loads the seed data from db/seeds.rb"

activerecord/lib/active_record/tasks/database_tasks.rb

@@ -194,6 +194,39 @@ module ActiveRecord
         ActiveRecord::Base.establish_connection(environment.to_sym)
       end
 
+      def prepare_all
+        seed = false
+
+        ActiveRecord::Base.configurations.configs_for(env_name: ActiveRecord::Tasks::DatabaseTasks.env).each do |db_config|
+          ActiveRecord::Base.establish_connection(db_config)
+
+          # Skipped when no database
+          ActiveRecord::Tasks::DatabaseTasks.migrate
+
+          if ActiveRecord::Base.dump_schema_after_migration
+            ActiveRecord::Tasks::DatabaseTasks.dump_schema(db_config, ActiveRecord::Base.schema_format)
+          end
+        rescue ActiveRecord::NoDatabaseError
+          config_name = db_config.name
+          ActiveRecord::Tasks::DatabaseTasks.create_current(db_config.env_name, config_name)
+
+          if File.exist?(ActiveRecord::Tasks::DatabaseTasks.dump_filename(config_name))
+            ActiveRecord::Tasks::DatabaseTasks.load_schema(
+              db_config,
+              ActiveRecord::Base.schema_format,
+              nil
+            )
+          else
+            ActiveRecord::Tasks::DatabaseTasks.migrate
+          end
+
+          seed = true
+        end
+
+        ActiveRecord::Base.establish_connection
+        ActiveRecord::Tasks::DatabaseTasks.load_seed if seed
+      end
+
       def drop(configuration, *arguments)
         db_config = resolve_configuration(configuration)
         database_adapter_for(db_config, *arguments).drop