rails-migrations

I have a model & a table which I no longer need in my App, I could leave them there but I would like to remove them to keep things tidy. I'm trying to figure out the best way to remove them with out messing around with my migrations & db/schema.rb files & any side effect it could have on my production environment, my app is on Heroku. I'm using PostgreSQL on both my local machine & heroku. So far I've found two ways to do this but am not sure which is the best method/ rails way? Method 1 I thought about just going in to my database & dropping the table & then destroying the model. rails db

I have created a User model and later a Task model. I have not mentioned any relation between them while creating. I understand that User has_many Tasks and a Task belongs_to User . I need to establish this relation between them through migration. My question is, what would be the migration generation command for establishing that relation? Any help would be highly appreciated. You could call: rails g model task user:references which will generates an user_id column in the tasks table and will modify the task.rb model to add a belongs_to :user relatonship. Please note, you must to put manually

I need to add timestamps ( created_at & updated_at ) to an existing table. I tried the following code but it didn't work. class AddTimestampsToUser < ActiveRecord::Migration def change_table add_timestamps(:users) end end Ben Simpson The timestamp helper is only available in the create_table block. You can add these columns by specifying the column types manually: class AddTimestampsToUser < ActiveRecord::Migration def change_table add_column :users, :created_at, :datetime, null: false add_column :users, :updated_at, :datetime, null: false end end While this does not have the same terse syntax

On Rails 4.0.0.rc1, Ruby 2.0.0, after I run a migration, I see the following error when I try to run a test through rspec : /Users/peeja/.rbenv/versions/2.0.0-p0/lib/ruby/gems/2.0.0/gems/activerecord-4.0.0.rc1/lib/active_record/migration.rb:376:in `check_pending!': Migrations are pending; run 'rake db:migrate RAILS_ENV=test' to resolve this issue. (ActiveRecord::PendingMigrationError) That doesn't seem right. No one migrates their test database, do they? They db:test:prepare it, which—to be fair—I've forgotten to do. So I run rake db:test:prepare and run my rspec command again…and see the same

What's the syntax for dropping a database table column through a Rails migration? Nick Hammond remove_column :table_name, :column_name For instance: remove_column :users, :hobby would remove the hobby Column from the users table. prabu For older versions of Rails ruby script/generate migration RemoveFieldNameFromTableName field_name:datatype For Rails 3 and up rails generate migration RemoveFieldNameFromTableName field_name:datatype Powers Rails 4 has been updated, so the change method can be used in the migration to drop a column and the migration will successfully rollback. Please read the