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

[Source]

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

Create a new migration class, and instance_eval the block.

[Source]

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

Public Instance methods

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 148
148:     def change(&block)
149:       migration.up = block
150:       migration.down = MigrationReverser.new.reverse(&block)
151:     end

Defines the migration‘s down action.

[Source]

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

Disable the use of transactions for the related migration

[Source]

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

Enable the use of transactions for the related migration

[Source]

     # File lib/sequel/extensions/migration.rb, line 132
132:     def transaction
133:       migration.use_transactions = true
134:     end

Defines the migration‘s up action.

[Source]

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

[Validate]