Don't require having Rails.application to run database tasks

4 files changed, 36 insertions, 15 deletions

diff --git a/activerecord/CHANGELOG.md b/activerecord/CHANGELOG.md
index 66c73bfe0f..16c25eeecd 100644
--- a/activerecord/CHANGELOG.md
+++ b/activerecord/CHANGELOG.md
@@ -1,3 +1,7 @@
+## Rails 4.1.0 (unreleased) ##
+
+*   Allow to use databases.rake tasks without having Rails.application *Piotr Sarnacki*
+
 ## Rails 4.0.0 (unreleased) ##
 
 *   Fix for a regression bug in which counter cache columns were not being updated
diff --git a/activerecord/lib/active_record/railtie.rb b/activerecord/lib/active_record/railtie.rb
index 99117b74c5..f3f1663f76 100644
--- a/activerecord/lib/active_record/railtie.rb
+++ b/activerecord/lib/active_record/railtie.rb
@@ -36,6 +36,18 @@ module ActiveRecord
 
     rake_tasks do
       require "active_record/base"
+
+      ActiveRecord::Tasks::DatabaseTasks.db_dir = Rails.application.config.paths["db"].first
+      ActiveRecord::Tasks::DatabaseTasks.seed_loader = Rails.application
+      ActiveRecord::Tasks::DatabaseTasks.database_configuration = Rails.application.config.database_configuration
+      ActiveRecord::Tasks::DatabaseTasks.migrations_paths = Rails.application.paths['db/migrate'].to_a
+
+      if defined?(ENGINE_PATH) && engine = Rails::Engine.find(ENGINE_PATH)
+        if engine.paths['db/migrate'].existent
+          ActiveRecord::Tasks::DatabaseTasks.migrations_paths += engine.paths['db/migrate'].to_a
+        end
+      end
+
       load "active_record/railties/databases.rake"
     end
 
diff --git a/activerecord/lib/active_record/railties/databases.rake b/activerecord/lib/active_record/railties/databases.rake
index fb1bab6dcc..6100a38d57 100644
--- a/activerecord/lib/active_record/railties/databases.rake
+++ b/activerecord/lib/active_record/railties/databases.rake
@@ -2,14 +2,8 @@ require 'active_record'
 
 db_namespace = namespace :db do
   task :load_config do
-    ActiveRecord::Base.configurations = Rails.application.config.database_configuration || {}
-    ActiveRecord::Migrator.migrations_paths = Rails.application.paths['db/migrate'].to_a
-
-    if defined?(ENGINE_PATH) && engine = Rails::Engine.find(ENGINE_PATH)
-      if engine.paths['db/migrate'].existent
-        ActiveRecord::Migrator.migrations_paths += engine.paths['db/migrate'].to_a
-      end
-    end
+    ActiveRecord::Base.configurations = ActiveRecord::Tasks::DatabaseTasks.database_configuration || {}
+    ActiveRecord::Migrator.migrations_paths = ActiveRecord::Tasks::DatabaseTasks.migrations_paths
   end
 
   namespace :create do
@@ -184,7 +178,7 @@ db_namespace = namespace :db do
   desc 'Load the seed data from db/seeds.rb'
   task :seed do
     db_namespace['abort_if_pending_migrations'].invoke
-    Rails.application.load_seed
+    ActiveRecord::Tasks::DatabaseTasks.load_seed
   end
 
   namespace :fixtures do
@@ -228,7 +222,7 @@ db_namespace = namespace :db do
     desc 'Create a db/schema.rb file that can be portably used against any DB supported by AR'
     task :dump => [:environment, :load_config] do
       require 'active_record/schema_dumper'
-      filename = ENV['SCHEMA'] || "#{Rails.root}/db/schema.rb"
+      filename = ENV['SCHEMA'] || File.join(ActiveRecord::Tasks::DatabaseTasks.db_dir, 'schema.rb')
       File.open(filename, "w:utf-8") do |file|
         ActiveRecord::SchemaDumper.dump(ActiveRecord::Base.connection, file)
       end
@@ -237,7 +231,7 @@ db_namespace = namespace :db do
 
     desc 'Load a schema.rb file into the database'
     task :load => [:environment, :load_config] do
-      file = ENV['SCHEMA'] || "#{Rails.root}/db/schema.rb"
+      file = ENV['SCHEMA'] || File.join(ActiveRecord::Tasks::DatabaseTasks.db_dir, 'schema.rb')
       if File.exists?(file)
         load(file)
       else
@@ -253,7 +247,7 @@ db_namespace = namespace :db do
       desc 'Create a db/schema_cache.dump file.'
       task :dump => [:environment, :load_config] do
         con = ActiveRecord::Base.connection
-        filename = File.join(Rails.application.config.paths["db"].first, "schema_cache.dump")
+        filename = File.join(ActiveRecord::Tasks::DatabaseTasks.db_dir, "schema_cache.dump")
 
         con.schema_cache.clear!
         con.tables.each { |table| con.schema_cache.add(table) }
@@ -262,7 +256,7 @@ db_namespace = namespace :db do
 
       desc 'Clear a db/schema_cache.dump file.'
       task :clear => [:environment, :load_config] do
-        filename = File.join(Rails.application.config.paths["db"].first, "schema_cache.dump")
+        filename = File.join(ActiveRecord::Tasks::DatabaseTasks.db_dir, "schema_cache.dump")
         FileUtils.rm(filename) if File.exists?(filename)
       end
     end
@@ -272,7 +266,7 @@ db_namespace = namespace :db do
   namespace :structure do
     desc 'Dump the database structure to db/structure.sql. Specify another file with DB_STRUCTURE=db/my_structure.sql'
     task :dump => [:environment, :load_config] do
-      filename = ENV['DB_STRUCTURE'] || File.join(Rails.root, "db", "structure.sql")
+      filename = ENV['DB_STRUCTURE'] || File.join(ActiveRecord::Tasks::DatabaseTasks.db_dir, "structure.sql")
       current_config = ActiveRecord::Tasks::DatabaseTasks.current_config
       ActiveRecord::Tasks::DatabaseTasks.structure_dump(current_config, filename)
 
@@ -286,7 +280,7 @@ db_namespace = namespace :db do
 
     # desc "Recreate the databases from the structure.sql file"
     task :load => [:environment, :load_config] do
-      filename = ENV['DB_STRUCTURE'] || File.join(Rails.root, "db", "structure.sql")
+      filename = ENV['DB_STRUCTURE'] || File.join(ActiveRecord::Tasks::DatabaseTasks.db_dir, "structure.sql")
       current_config = ActiveRecord::Tasks::DatabaseTasks.current_config
       ActiveRecord::Tasks::DatabaseTasks.structure_load(current_config, filename)
     end
diff --git a/activerecord/lib/active_record/tasks/database_tasks.rb b/activerecord/lib/active_record/tasks/database_tasks.rb
index 36133bab4c..9588d6c6c6 100644
--- a/activerecord/lib/active_record/tasks/database_tasks.rb
+++ b/activerecord/lib/active_record/tasks/database_tasks.rb
@@ -7,6 +7,7 @@ module ActiveRecord
       extend self
 
       attr_writer :current_config
+      attr_accessor :database_configuration, :migrations_paths, :seed_loader, :db_dir
 
       LOCAL_HOSTS    = ['127.0.0.1', 'localhost']
 
@@ -117,6 +118,16 @@ module ActiveRecord
         class_for_adapter(configuration['adapter']).new(*arguments).structure_load(filename)
       end
 
+      def load_seed
+        if seed_loader
+          seed_loader.load_seed
+        else
+          raise "You tried to load seed data, but no seed loader is specified. Please specify seed " +
+                "loader with ActiveRecord::Tasks::DatabaseTasks.seed_loader = your_seed_loader\n" +
+                "Seed loader should respond to load_seed method"
+        end
+      end
+
       private
 
       def database_url_config