Rails migration generation with options or defaults

[Kirankumar Skk]

In Rails we have command to add migration that specifies the table name column name. For example :

$ rails generate migration AddPartNumberToProducts part_number:string

will generate

class AddPartNumberToProducts < ActiveRecord::Migration
  def change
    add_column :products, :part_number, :string
  end
end

I know we can add the options on migration file, below migration will add part_number column after description column on products table.

class AddPartNumberToProducts < ActiveRecord::Migration
  def change
    add_column :products, :part_number, :string, :after => :descritpion 
  end
end

Problem: How to specify the options (example :after => :descritpion) on command line so that it will add directly on migration file.

FYI : I've asked the same question on stackoverflow Link 

http://stackoverflow.com/questions/17720849/rails-migration-generation-with-options

[Robert Walker]

Kirankumar Skk wrote in post #1116632:

> In Rails we have command to add migration that specifies the table name
> column name. For example :
>
> $ rails generate migration AddPartNumberToProducts part_number:string
>

> *Problem: How to specify the options (example :after => :descritpion) on
> command line so that it will add directly on migration file.*

Allowing you to specify the columns on the command line generator is a
convenience feature. It was never intended to provide the full range of
options that can be specified in the actual migration.

There is a limited set of additional options you can specify on the
command line as detailed in section 2.3 of the following guide:

http://guides.rubyonrails.org/migrations.html#model-generators

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