Class Sequel::MigrationDSL
In: lib/sequel/extensions/migration.rb
Parent: BasicObject

Internal class used by the Sequel.migration DSL, part of the migration extension.

Methods

change   create   down   new   no_transaction   transaction   up  

Attributes

migration  [R]  The underlying Migration instance

Public Class methods

create(&block)

[Source]

     # File lib/sequel/extensions/migration.rb, line 109
109:     def self.create(&block)
110:       new(&block).migration
111:     end
new(&block)

Create a new migration class, and instance_eval the block.

[Source]

     # File lib/sequel/extensions/migration.rb, line 114
114:     def initialize(&block)
115:       @migration = SimpleMigration.new
116:       Migration.descendants << migration
117:       instance_eval(&block)
118:     end

Public Instance methods

change(&block)

Creates a reversible migration. This is the same as creating the same block with up, but it also calls the block and attempts to create a down block that will reverse the changes made by the block.

There are no guarantees that this will work perfectly in all cases, but it should work for most common cases.

[Source]

     # File lib/sequel/extensions/migration.rb, line 147
147:     def change(&block)
148:       migration.up = block
149:       migration.down = MigrationReverser.new.reverse(&block)
150:     end
down(&block)

Defines the migration‘s down action.

[Source]

     # File lib/sequel/extensions/migration.rb, line 121
121:     def down(&block)
122:       migration.down = block
123:     end
no_transaction()

Disable the use of transactions for the related migration

[Source]

     # File lib/sequel/extensions/migration.rb, line 126
126:     def no_transaction
127:       migration.use_transactions = false
128:     end
transaction()

Enable the use of transactions for the related migration

[Source]

     # File lib/sequel/extensions/migration.rb, line 131
131:     def transaction
132:       migration.use_transactions = true
133:     end
up(&block)

Defines the migration‘s up action.

[Source]

     # File lib/sequel/extensions/migration.rb, line 136
136:     def up(&block)
137:       migration.up = block
138:     end

[Validate]