Class: Automigration::Migrator

Inherits:
Object
  • Object
show all
Defined in:
lib/automigration/migrator.rb

Constant Summary collapse

@@system_tables = 
[]
@@migration_paths = 
[]
@@model_paths = 
[]

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Migrator

Returns a new instance of Migrator.



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# File 'lib/automigration/migrator.rb', line 31

def initialize(options = {})
  options.assert_valid_keys(:skip_output, :models)

  self.class.load_all_models!

  @models = options[:models] || ActiveRecord::Base.descendants
  @options = options
end

Class Method Details

.load_all_models! ⇒ Object 



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# File 'lib/automigration/migrator.rb', line 22

def self.load_all_models!
  @@model_paths.each do |path|
    Dir[File.expand_path("**/*.rb", path)].each do |file|
      name = file.sub(path.to_s + '/', '').sub(Regexp.new(File.extname(file) + '$'), '')
      ActiveSupport::Dependencies.constantize(name.classify)
    end
  end
end

.set_migration_paths(paths) ⇒ Object 



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# File 'lib/automigration/migrator.rb', line 14

def self.set_migration_paths(paths)
  @@migration_paths = paths
end

.set_model_paths(paths) ⇒ Object 



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# File 'lib/automigration/migrator.rb', line 18

def self.set_model_paths(paths)
  @@model_paths = paths
end

.set_system_tables(tables) ⇒ Object 



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# File 'lib/automigration/migrator.rb', line 10

def self.set_system_tables(tables)
  @@system_tables = tables
end

Instance Method Details

#update_schema! ⇒ Object 



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# File 'lib/automigration/migrator.rb', line 40

def update_schema!
  log "Models: " + @models.map(&:to_s).join(', ')

  # update tables
  tables = ['schema_migrations']
  @models.each do |model|
    update_model_schema(model)
    tables << model.table_name
  end

  #remove unused tables
  (connection.tables - tables - @@system_tables).each do |table|
    connection.drop_table(table)
    log "Remove table '#{table}'", :red
  end

  # clean migration table
  if connection.table_exists?('schema_migrations') && !@@migration_paths.empty?
    sql = "SELECT version FROM schema_migrations;"

    migrations_in_db = connection.execute(sql).map{|row| row.is_a?(Hash) ? row['version'] : row.first }
    current_migrations = []
    @@migration_paths.each do |path|
      Dir[File.expand_path("*.rb", path)].each do |m_file| 
        File.basename(m_file) =~ /(\d{14})/
        current_migrations << $1
      end
    end

    (migrations_in_db - current_migrations).each do |m|
      log "Clean migration '#{m}'", :red
      sql = "DELETE FROM schema_migrations WHERE version = '#{m}';"
      connection.execute(sql)
    end
  end
end