Fixed db:prepare task for multiple databases.

When one database existed already, but not the other,
during setup of missing one, existing database was wiped out.

2 files changed, 49 insertions, 19 deletions

diff --git a/activerecord/lib/active_record/railties/databases.rake b/activerecord/lib/active_record/railties/databases.rake
index e0bc5180c0..befcbc8984 100644
--- a/activerecord/lib/active_record/railties/databases.rake
+++ b/activerecord/lib/active_record/railties/databases.rake
@@ -266,12 +266,31 @@ 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::Base.configurations.configs_for(env_name: ActiveRecord::Tasks::DatabaseTasks.env).each do |db_config|
       ActiveRecord::Base.establish_connection(db_config.config)
-      db_namespace["migrate"].invoke
+
+      ActiveRecord::Tasks::DatabaseTasks.migrate
+
+      # Skipped when no database
+      ActiveRecord::Tasks::DatabaseTasks.dump_schema(db_config.config, ActiveRecord::Base.schema_format, db_config.spec_name)
+
     rescue ActiveRecord::NoDatabaseError
-      db_namespace["setup"].invoke
+      ActiveRecord::Tasks::DatabaseTasks.create_current(db_config.env_name, db_config.spec_name)
+      ActiveRecord::Tasks::DatabaseTasks.load_schema(
+        db_config.config,
+        ActiveRecord::Base.schema_format,
+        nil,
+        db_config.env_name,
+        db_config.spec_name
+      )
+
+      seed = true
     end
+
+    ActiveRecord::Base.establish_connection
+    ActiveRecord::Tasks::DatabaseTasks.load_seed if seed
   end
 
   desc "Loads the seed data from db/seeds.rb"
@@ -336,13 +355,9 @@ db_namespace = namespace :db do
   namespace :schema do
     desc "Creates a db/schema.rb file that is portable against any DB supported by Active Record"
     task dump: :load_config do
-      require "active_record/schema_dumper"
       ActiveRecord::Base.configurations.configs_for(env_name: ActiveRecord::Tasks::DatabaseTasks.env).each do |db_config|
-        filename = ActiveRecord::Tasks::DatabaseTasks.dump_filename(db_config.spec_name, :ruby)
-        File.open(filename, "w:utf-8") do |file|
-          ActiveRecord::Base.establish_connection(db_config.config)
-          ActiveRecord::SchemaDumper.dump(ActiveRecord::Base.connection, file)
-        end
+        ActiveRecord::Base.establish_connection(db_config.config)
+        ActiveRecord::Tasks::DatabaseTasks.dump_schema(db_config.config, :ruby, db_config.spec_name)
       end
 
       db_namespace["schema:dump"].reenable
@@ -385,14 +400,7 @@ db_namespace = namespace :db do
     task dump: :load_config do
       ActiveRecord::Base.configurations.configs_for(env_name: ActiveRecord::Tasks::DatabaseTasks.env).each do |db_config|
         ActiveRecord::Base.establish_connection(db_config.config)
-        filename = ActiveRecord::Tasks::DatabaseTasks.dump_filename(db_config.spec_name, :sql)
-        ActiveRecord::Tasks::DatabaseTasks.structure_dump(db_config.config, filename)
-        if ActiveRecord::SchemaMigration.table_exists?
-          File.open(filename, "a") do |f|
-            f.puts ActiveRecord::Base.connection.dump_schema_information
-            f.print "\n"
-          end
-        end
+        ActiveRecord::Tasks::DatabaseTasks.dump_schema(db_config.config, :sql, db_config.spec_name)
       end
 
       db_namespace["structure:dump"].reenable
diff --git a/activerecord/lib/active_record/tasks/database_tasks.rb b/activerecord/lib/active_record/tasks/database_tasks.rb
index c79ed8db60..636db0f33d 100644
--- a/activerecord/lib/active_record/tasks/database_tasks.rb
+++ b/activerecord/lib/active_record/tasks/database_tasks.rb
@@ -169,8 +169,8 @@ module ActiveRecord
         end
       end
 
-      def create_current(environment = env)
-        each_current_configuration(environment) { |configuration|
+      def create_current(environment = env, spec_name = nil)
+        each_current_configuration(environment, spec_name) { |configuration|
           create configuration
         }
         ActiveRecord::Base.establish_connection(environment.to_sym)
@@ -325,6 +325,26 @@ module ActiveRecord
         Migration.verbose = verbose_was
       end
 
+      def dump_schema(configuration, format = ActiveRecord::Base.schema_format, spec_name = "primary")
+        require "active_record/schema_dumper"
+        filename = dump_filename(spec_name, format)
+
+        case format
+        when :ruby
+          File.open(filename, "w:utf-8") do |file|
+            ActiveRecord::SchemaDumper.dump(ActiveRecord::Base.connection, file)
+          end
+        when :sql
+          structure_dump(configuration, filename)
+          if ActiveRecord::SchemaMigration.table_exists?
+            File.open(filename, "a") do |f|
+              f.puts ActiveRecord::Base.connection.dump_schema_information
+              f.print "\n"
+            end
+          end
+        end
+      end
+
       def schema_file(format = ActiveRecord::Base.schema_format)
         File.join(db_dir, schema_file_type(format))
       end
@@ -406,12 +426,14 @@ module ActiveRecord
           task.is_a?(String) ? task.constantize : task
         end
 
-        def each_current_configuration(environment)
+        def each_current_configuration(environment, spec_name = nil)
           environments = [environment]
           environments << "test" if environment == "development"
 
           environments.each do |env|
             ActiveRecord::Base.configurations.configs_for(env_name: env).each do |db_config|
+              next if spec_name && spec_name != db_config.spec_name
+
               yield db_config.config, db_config.spec_name, env
             end
           end