Module: ActiveRecord::Tasks::DatabaseTasks

Extended by:
DatabaseTasks
Included in:
DatabaseTasks
Defined in:
lib/active_record/tasks/database_tasks.rb

Overview

ActiveRecord::Tasks::DatabaseTasks is a utility class, which encapsulates logic behind common tasks used to manage database and migrations.

The tasks defined here are used in rake tasks provided by Active Record.

In order to use DatabaseTasks, a few config values need to be set. All the needed config values are set by Rails already, so it’s necessary to do it only if you want to change the defaults or when you want to use Active Record outside of Rails (in such case after configuring the database tasks, you can also use the rake tasks defined in Active Record).

The possible config values are:

* +env+: current environment (like Rails.env).
* +database_configuration+: configuration of your databases (as in +config/database.yml+).
* +db_dir+: your +db+ directory.
* +fixtures_path+: a path to fixtures directory.
* +migrations_paths+: a list of paths to directories with migrations.
* +seed_loader+: an object which will load seeds, it needs to respond to the +load_seed+ method.

Example usage of DatabaseTasks outside Rails could look as such:

include ActiveRecord::Tasks
DatabaseTasks.database_configuration = YAML.load(File.read('my_database_config.yml'))
DatabaseTasks.db_dir = 'db'
# other settings...

DatabaseTasks.create_current('production')

Constant Summary collapse

LOCAL_HOSTS = 
['127.0.0.1', 'localhost']

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#current_config(options = {}) ⇒ Object 



57
58
59
60
61
62
63
64
65
66
67
68
 
# File 'lib/active_record/tasks/database_tasks.rb', line 57

def current_config(options = {})
  options.reverse_merge! :env => env
  if options.has_key?(:config)
    @current_config = options[:config]
  else
    @current_config ||= if ENV['DATABASE_URL']
                          database_url_config
                        else
                          ActiveRecord::Base.configurations[options[:env]]
                        end
  end
end

#database_configuration ⇒ Object

Returns the value of attribute database_configuration.



39
40
41
 
# File 'lib/active_record/tasks/database_tasks.rb', line 39

def database_configuration
  @database_configuration
end

#db_dir ⇒ Object

Returns the value of attribute db_dir.



39
40
41
 
# File 'lib/active_record/tasks/database_tasks.rb', line 39

def db_dir
  @db_dir
end

#env ⇒ Object

Returns the value of attribute env.



39
40
41
 
# File 'lib/active_record/tasks/database_tasks.rb', line 39

def env
  @env
end

#fixtures_path ⇒ Object

Returns the value of attribute fixtures_path.



39
40
41
 
# File 'lib/active_record/tasks/database_tasks.rb', line 39

def fixtures_path
  @fixtures_path
end

#migrations_paths ⇒ Object

Returns the value of attribute migrations_paths.



39
40
41
 
# File 'lib/active_record/tasks/database_tasks.rb', line 39

def migrations_paths
  @migrations_paths
end

#seed_loader ⇒ Object

Returns the value of attribute seed_loader.



39
40
41
 
# File 'lib/active_record/tasks/database_tasks.rb', line 39

def seed_loader
  @seed_loader
end

Instance Method Details

#charset(*arguments) ⇒ Object 



121
122
123
124
 
# File 'lib/active_record/tasks/database_tasks.rb', line 121

def charset(*arguments)
  configuration = arguments.first
  class_for_adapter(configuration['adapter']).new(*arguments).charset
end

#charset_current(environment = env) ⇒ Object 



117
118
119
 
# File 'lib/active_record/tasks/database_tasks.rb', line 117

def charset_current(environment = env)
  charset ActiveRecord::Base.configurations[environment]
end

#collation(*arguments) ⇒ Object 



130
131
132
133
 
# File 'lib/active_record/tasks/database_tasks.rb', line 130

def collation(*arguments)
  configuration = arguments.first
  class_for_adapter(configuration['adapter']).new(*arguments).collation
end

#collation_current(environment = env) ⇒ Object 



126
127
128
 
# File 'lib/active_record/tasks/database_tasks.rb', line 126

def collation_current(environment = env)
  collation ActiveRecord::Base.configurations[environment]
end

#create(*arguments) ⇒ Object 



70
71
72
73
74
75
76
77
78
 
# File 'lib/active_record/tasks/database_tasks.rb', line 70

def create(*arguments)
  configuration = arguments.first
  class_for_adapter(configuration['adapter']).new(*arguments).create
rescue DatabaseAlreadyExists
  $stderr.puts "#{configuration['database']} already exists"
rescue Exception => error
  $stderr.puts error, *(error.backtrace)
  $stderr.puts "Couldn't create database for #{configuration.inspect}"
end

#create_all ⇒ Object 



80
81
82
 
# File 'lib/active_record/tasks/database_tasks.rb', line 80

def create_all
  each_local_configuration { |configuration| create configuration }
end

#create_current(environment = env) ⇒ Object 



84
85
86
87
88
89
 
# File 'lib/active_record/tasks/database_tasks.rb', line 84

def create_current(environment = env)
  each_current_configuration(environment) { |configuration|
    create configuration
  }
  ActiveRecord::Base.establish_connection environment
end

#create_database_url ⇒ Object 



91
92
93
 
# File 'lib/active_record/tasks/database_tasks.rb', line 91

def create_database_url
  create database_url_config
end

#drop(*arguments) ⇒ Object 



95
96
97
98
99
100
101
 
# File 'lib/active_record/tasks/database_tasks.rb', line 95

def drop(*arguments)
  configuration = arguments.first
  class_for_adapter(configuration['adapter']).new(*arguments).drop
rescue Exception => error
  $stderr.puts error, *(error.backtrace)
  $stderr.puts "Couldn't drop #{configuration['database']}"
end

#drop_all ⇒ Object 



103
104
105
 
# File 'lib/active_record/tasks/database_tasks.rb', line 103

def drop_all
  each_local_configuration { |configuration| drop configuration }
end

#drop_current(environment = env) ⇒ Object 



107
108
109
110
111
 
# File 'lib/active_record/tasks/database_tasks.rb', line 107

def drop_current(environment = env)
  each_current_configuration(environment) { |configuration|
    drop configuration
  }
end

#drop_database_url ⇒ Object 



113
114
115
 
# File 'lib/active_record/tasks/database_tasks.rb', line 113

def drop_database_url
  drop database_url_config
end

#load_seed ⇒ Object 



151
152
153
154
155
156
157
158
159
 
# File 'lib/active_record/tasks/database_tasks.rb', line 151

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

#purge(configuration) ⇒ Object 



135
136
137
 
# File 'lib/active_record/tasks/database_tasks.rb', line 135

def purge(configuration)
  class_for_adapter(configuration['adapter']).new(configuration).purge
end

#register_task(pattern, task) ⇒ Object 



44
45
46
47
 
# File 'lib/active_record/tasks/database_tasks.rb', line 44

def register_task(pattern, task)
  @tasks ||= {}
  @tasks[pattern] = task
end

#structure_dump(*arguments) ⇒ Object 



139
140
141
142
143
 
# File 'lib/active_record/tasks/database_tasks.rb', line 139

def structure_dump(*arguments)
  configuration = arguments.first
  filename = arguments.delete_at 1
  class_for_adapter(configuration['adapter']).new(*arguments).structure_dump(filename)
end

#structure_load(*arguments) ⇒ Object 



145
146
147
148
149
 
# File 'lib/active_record/tasks/database_tasks.rb', line 145

def structure_load(*arguments)
  configuration = arguments.first
  filename = arguments.delete_at 1
  class_for_adapter(configuration['adapter']).new(*arguments).structure_load(filename)
end