Internal class used by the Sequel.migration
DSL, part of the migration
extension.
Attributes
migration | [R] |
The underlying |
Public Class methods
create(&block)
[show source]
# File lib/sequel/extensions/migration.rb 120 def self.create(&block) 121 new(&block).migration 122 end
new(&block)
Create a new migration class, and instance_exec the block.
[show source]
# File lib/sequel/extensions/migration.rb 125 def initialize(&block) 126 @migration = SimpleMigration.new 127 Migration.descendants << migration 128 instance_exec(&block) 129 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 works for some simple cases.
[show source]
# File lib/sequel/extensions/migration.rb 158 def change(&block) 159 migration.up = block 160 migration.down = MigrationReverser.new.reverse(&block) 161 end
down(&block)
Defines the migration’s down action.
[show source]
# File lib/sequel/extensions/migration.rb 132 def down(&block) 133 migration.down = block 134 end
no_transaction()
Disable the use of transactions for the related migration
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# File lib/sequel/extensions/migration.rb 137 def no_transaction 138 migration.use_transactions = false 139 end
transaction()
Enable the use of transactions for the related migration
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# File lib/sequel/extensions/migration.rb 142 def transaction 143 migration.use_transactions = true 144 end
up(&block)
Defines the migration’s up action.
[show source]
# File lib/sequel/extensions/migration.rb 147 def up(&block) 148 migration.up = block 149 end