mongodb rails mongodb数据未清除

Question

Rails 3.2.1

app name: demo

database: mongoDB with mongoid

I have this scaffolding set up in rails 3.2.1: localhost:3000/pages,

and I have these fields: title, content.

I have already filled in 3 rows of data to each field.

The problem is: after deleting the app(by removing the root folder) and creating the same app name(demo) with the same scaffolding(pages), those 3 rows of data remain showing up which I don't want anymore.

Can anyone how to clean the database up?Thanks

Answer 1

the simplest way that i'm aware of is

rake db:mongoid:drop

as others said, you can go to rake --tasks and see it as well

Answer 2

The database exists outside your application, so deleting your application will not affect it. To empty or delete it you need to use the mongo command line or another mongo tool. Open up a terminal / command prompt and type:

mongo

And you should get the mongo command line. Switch to the DB for your app (it will most likely be of the form [app_name]_[environment] :

use demo_development

And use the dropDatabase command:

db.dropDatabase()

Answer 3

Here is a quick snippet of how you can define a task, called db_reset, in your application namespace. It will drop both system and Mongo DBs given that MongoId gem is properly installed

lib/tasks/app_name.rake:

namespace Rails.application.class.parent do
  desc 'Drops and recreates both Mongo and system databases for the current environment and loads the seeds.'
  task db_reset: :environment do
    Rake::Task['db:mongoid:purge'].invoke
    Rake::Task['db:reset'].invoke
  end
end