Code-First equivalent in Ruby [closed]

Question

I'm suuuuper lazy and don't like making migrations. I want to make models I'm going to use anyway and have something else figure out the migrations for me in ruby because .Net has spoiled me. Is there a gem that will give me active record migrations from models? Can that even be possible since you never explicitly set types in ruby?

Answer 1

You can use DataMapper instead of ActiveRecord.

Sample Code from the DataMapper Documentation:

require 'rubygems'
require 'dm-core'
require 'dm-migrations'

DataMapper::Logger.new($stdout, :debug)
DataMapper.setup(:default, 'mysql://localhost/test')

class Person
  include DataMapper::Resource
  property :id,   Serial
  property :name, String, :required => true
end

DataMapper.auto_migrate!

Answer 2

This doesn't make any sense. Your models pull data their structure from the schema, they don't contain column/table definitions. There is no way to "push" table structure from your models into migrations, it's impossible. The data just isn't there.

This model, as written, may have persist to a table with a thousand columns or one column, there is no way of knowing:

class User < ActiveRecord::Base

end

Just use the Rails generators to produce your models and migrations at the same time.