class Sequel::MigrationAlterTableReverser

Handles reversing an alter_table block in a reversible migration.

Public Class Methods

new() click to toggle source
    # File lib/sequel/extensions/migration.rb
245 def initialize
246   @actions = []
247 end

Public Instance Methods

reverse(&block) click to toggle source
    # File lib/sequel/extensions/migration.rb
249 def reverse(&block)
250   instance_exec(&block)
251   actions = @actions.reverse
252   # Allow calling private methods as the reversing methods are private
253   Proc.new{actions.each{|a| send(*a)}}
254 end

Private Instance Methods

add_column(*args) click to toggle source
    # File lib/sequel/extensions/migration.rb
258 def add_column(*args)
259   @actions << [:drop_column, args.first]
260 end
add_constraint(*args) click to toggle source
    # File lib/sequel/extensions/migration.rb
262 def add_constraint(*args)
263   name = args.first
264   name = name.is_a?(Hash) ? name[:name] : name
265   @actions << [:drop_constraint, name]
266 end
add_foreign_key(key, table, *args) click to toggle source
    # File lib/sequel/extensions/migration.rb
268 def add_foreign_key(key, table, *args)
269   @actions << [:drop_foreign_key, key, *args]
270 end
add_full_text_index(*args)
Alias for: add_index
add_index(*args) click to toggle source
    # File lib/sequel/extensions/migration.rb
277 def add_index(*args)
278   @actions << [:drop_index, *args]
279 end
add_primary_key(*args) click to toggle source
    # File lib/sequel/extensions/migration.rb
272 def add_primary_key(*args)
273   raise if args.first.is_a?(Array)
274   @actions << [:drop_column, args.first]
275 end
add_spatial_index(*args)
Alias for: add_index
rename_column(name, new_name) click to toggle source
    # File lib/sequel/extensions/migration.rb
283 def rename_column(name, new_name)
284   @actions << [:rename_column, new_name, name]
285 end
set_column_allow_null(name, allow_null=true) click to toggle source
    # File lib/sequel/extensions/migration.rb
287 def set_column_allow_null(name, allow_null=true)
288   @actions << [:set_column_allow_null, name, !allow_null]
289 end