Question

I created a model using:

rails generate model SavingsItem

I then ran rake db:migrate.

Now, I want to rename the model to SavingsProduct

I did a rake db:rollback and then went directly into my migration file and change the model name and table name. However, when I run rake db:migrate again, it creates the right table name in my database, but creates savings_item.rb still.

Why does this happen?

Here is my migration file:

class CreateSavingsProducts < ActiveRecord::Migration
  def change
    create_table :savings_products do |t|
      t.string :name, :limit => 50
      t.string :description, :limit => 200
      t.decimal :price, :precision => 10, :scale => 2
      t.string :buy_url, :limit => 200
      t.string :image_url, :limit => 200
      t.integer :image_width, :limit => 11
      t.integer :image_height, :limit => 11
      t.timestamps
    end
  end
end

Answer 1

when I run rake db:migrate again, it creates the right table name in
my database, but creates savings_item.rb

Migrations only alter the database; they don’t create or alter any files (except schema.rb). Generators are what create and alter files, including migration files.

If you already have the model generated, you can simply change its name manually. Change class SavingsItem to class SavingsProduct and rename the file from savings_item.rb to savings_product.rb.