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Class: ActiveRecord::MigrationProxy

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ::Struct
Instance Chain:
self, ::Struct
Inherits: Struct
Defined in: activerecord/lib/active_record/migration.rb

Overview

MigrationProxy is used to defer loading of the actual migration classes until they are needed

Class Method Summary

Instance Attribute Summary

  • #announce readonly
  • #disable_ddl_transaction readonly
  • #filename rw

    MigrationProxy is used to defer loading of the actual migration classes until they are needed.

  • #migrate readonly
  • #name rw

    MigrationProxy is used to defer loading of the actual migration classes until they are needed.

  • #scope rw

    MigrationProxy is used to defer loading of the actual migration classes until they are needed.

  • #version rw

    MigrationProxy is used to defer loading of the actual migration classes until they are needed.

  • #write readonly

Instance Method Summary

::Struct - Inherited

#as_json

Constructor Details

.new(name, version, filename, scope) ⇒ MigrationProxy

[ GitHub ] 

  


# File 'activerecord/lib/active_record/migration.rb', line 1169



def initialize(name, version, filename, scope)
  super
  @migration = nil
end


  







Instance Attribute Details



  

    #announce   (readonly)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/migration.rb', line 1178



delegate :migrate, :announce, :write, :disable_ddl_transaction, to: :migration


  








  

    #disable_ddl_transaction   (readonly)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/migration.rb', line 1178



delegate :migrate, :announce, :write, :disable_ddl_transaction, to: :migration


  








  

    #filename   (rw)
  



  

    

MigrationProxy is used to defer loading of the actual migration classes until they are needed


  



  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/migration.rb', line 1168



MigrationProxy = Struct.new(:name, :version, :filename, :scope)


  








  

    #migrate   (readonly)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/migration.rb', line 1178



delegate :migrate, :announce, :write, :disable_ddl_transaction, to: :migration


  








  

    #name   (rw)
  



  

    

MigrationProxy is used to defer loading of the actual migration classes until they are needed


  



  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/migration.rb', line 1168



MigrationProxy = Struct.new(:name, :version, :filename, :scope)


  








  

    #scope   (rw)
  



  

    

MigrationProxy is used to defer loading of the actual migration classes until they are needed


  



  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/migration.rb', line 1168



MigrationProxy = Struct.new(:name, :version, :filename, :scope)


  








  

    #version   (rw)
  



  

    

MigrationProxy is used to defer loading of the actual migration classes until they are needed


  



  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/migration.rb', line 1168



MigrationProxy = Struct.new(:name, :version, :filename, :scope)


  








  

    #write   (readonly)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/migration.rb', line 1178



delegate :migrate, :announce, :write, :disable_ddl_transaction, to: :migration


  







Instance Method Details



  

    #basename  
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/migration.rb', line 1174



def basename
  File.basename(filename)
end


  








  

    #load_migration   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/migration.rb', line 1185



def load_migration
  Object.send(:remove_const, name) rescue nil

  load(File.expand_path(filename))
  name.constantize.new(name, version)
end


  








  

    #migration   (private)
  

  [ GitHub ]


  

  


# File 'activerecord/lib/active_record/migration.rb', line 1181



def migration
  @migration ||= load_migration
end