Class: Migu::Migrator

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(migrations = Migu::Migration.subclasses) ⇒ Migrator 



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# File 'lib/migu/migrator.rb', line 5

def initialize(migrations = Migu::Migration.subclasses)
  @migrations = migrations.sort { |a, b| a.time <=> b.time }
end

Instance Attribute Details

#migrations ⇒ Object (readonly)

Returns the value of attribute migrations.



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# File 'lib/migu/migrator.rb', line 3

def migrations
  @migrations
end

Instance Method Details

#migrate ⇒ Object 



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# File 'lib/migu/migrator.rb', line 13

def migrate
  Migu.configuration.before_hook.call
  migrations.each do |migration|
    unless state.find(migration.name)
      puts "==== Migrate #{migration.name} ===="
      migration.new.up
      state.insert(migration.name, migration.time.to_s)
    end
  end
  Migu.configuration.after_hook.call
end

#rollback ⇒ Object 



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# File 'lib/migu/migrator.rb', line 25

def rollback
  Migu.configuration.before_hook.call
  if state.migrated.empty?
    puts "==== No migrations to rollback ===="
    return
  end
  migration = migrations.find { |migration|
    migration.name == state.migrated.last[1]
  }
  puts "==== Rollback #{migration.name} ===="
  migration.new.down
  state.delete(migration.name)
  Migu.configuration.after_hook.call
end

#state ⇒ Object 



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# File 'lib/migu/migrator.rb', line 9

def state
  Migu::State.new
end