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
229 def initialize
230   @actions = []
231 end

Public Instance Methods

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

Private Instance Methods

add_column(*args) click to toggle source
    # File lib/sequel/extensions/migration.rb
242 def add_column(*args)
243   @actions << [:drop_column, args.first]
244 end
add_constraint(*args) click to toggle source
    # File lib/sequel/extensions/migration.rb
246 def add_constraint(*args)
247   name = args.first
248   name = name.is_a?(Hash) ? name[:name] : name
249   @actions << [:drop_constraint, name]
250 end
add_foreign_key(key, table, *args) click to toggle source
    # File lib/sequel/extensions/migration.rb
252 def add_foreign_key(key, table, *args)
253   @actions << [:drop_foreign_key, key, *args]
254 end
add_full_text_index(*args)
Alias for: add_index
add_index(*args) click to toggle source
    # File lib/sequel/extensions/migration.rb
261 def add_index(*args)
262   @actions << [:drop_index, *args]
263 end
add_primary_key(*args) click to toggle source
    # File lib/sequel/extensions/migration.rb
256 def add_primary_key(*args)
257   raise if args.first.is_a?(Array)
258   @actions << [:drop_column, args.first]
259 end
add_spatial_index(*args)
Alias for: add_index
rename_column(name, new_name) click to toggle source
    # File lib/sequel/extensions/migration.rb
267 def rename_column(name, new_name)
268   @actions << [:rename_column, new_name, name]
269 end