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
232 def initialize
233   @actions = []
234 end

Public Instance Methods

reverse(&block) click to toggle source
    # File lib/sequel/extensions/migration.rb
236 def reverse(&block)
237   instance_exec(&block)
238   actions = @actions.reverse
239   # Allow calling private methods as the reversing methods are private
240   Proc.new{actions.each{|a| send(*a)}}
241 end

Private Instance Methods

add_column(*args) click to toggle source
    # File lib/sequel/extensions/migration.rb
245 def add_column(*args)
246   @actions << [:drop_column, args.first]
247 end
add_constraint(*args) click to toggle source
    # File lib/sequel/extensions/migration.rb
249 def add_constraint(*args)
250   name = args.first
251   name = name.is_a?(Hash) ? name[:name] : name
252   @actions << [:drop_constraint, name]
253 end
add_foreign_key(key, table, *args) click to toggle source
    # File lib/sequel/extensions/migration.rb
255 def add_foreign_key(key, table, *args)
256   @actions << [:drop_foreign_key, key, *args]
257 end
add_full_text_index(*args)
Alias for: add_index
add_index(*args) click to toggle source
    # File lib/sequel/extensions/migration.rb
264 def add_index(*args)
265   @actions << [:drop_index, *args]
266 end
add_primary_key(*args) click to toggle source
    # File lib/sequel/extensions/migration.rb
259 def add_primary_key(*args)
260   raise if args.first.is_a?(Array)
261   @actions << [:drop_column, args.first]
262 end
add_spatial_index(*args)
Alias for: add_index
rename_column(name, new_name) click to toggle source
    # File lib/sequel/extensions/migration.rb
270 def rename_column(name, new_name)
271   @actions << [:rename_column, new_name, name]
272 end
set_column_allow_null(name, allow_null=true) click to toggle source
    # File lib/sequel/extensions/migration.rb
274 def set_column_allow_null(name, allow_null=true)
275   @actions << [:set_column_allow_null, name, !allow_null]
276 end