To add multiple columns to a table, separate field:type
pairs with spaces when using rails generate migration
command.
The general syntax is:
rails generate migration NAME [field[:type][:index] field[:type][:index]] [options]
For example, the following will add name
, salary
and email
fields to the users
table:
rails generate migration AddDetailsToUsers name:string salary:decimal email:string
Which generates the following migration:
class AddDetailsToUsers < ActiveRecord::Migration[5.0]
def change
add_column :users, :name, :string
add_column :users, :salary, :decimal
add_column :users, :email, :string
end
end