I want to know if I can pass a default value to the rails g migration
command. Something like:
$ rails generate migration add_disabled_to_users disabled:boolean:false #where false is default value for disabled attribute
in order to generate:
class AddDisabledToUsers < ActiveRecord::Migration def change add_column :users, :disabled, :boolean, default: false end end
Rails uses this timestamp to determine which migration should be run and in what order, so if you're copying a migration from another application or generate a file yourself, be aware of its position in the order. This generator can do much more than append a timestamp to the file name.
A Rails migration is a tool for changing an application's database schema. Instead of managing SQL scripts, you define database changes in a domain-specific language (DSL). The code is database-independent, so you can easily move your app to a new platform.
You can't: https://guides.rubyonrails.org/active_record_migrations.html#column-modifiers
null and default cannot be specified via command line.
The only solution is to modify the migration after it's generated. It was the case in Rails 3, still the case in Rails 6
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