Rails没有创建任何数据库目录

Question

While I'm creating a new rails app, there is no db directory while skipping active record for using mongodb later, By this command.

rails new app-name --skip-active-record

where rails new app-name created db as expected. And so, rake db:create or rake db:migrate don't act expectedly. I need to edit /db/seeds.rb & i cann't find it.

I tried some post fixing, nothing brings the missing directory. I'm new in rails. Have I missed something? Thanks for cooperating.

Answer 1

By including --skip-active-record in the new command, you are telling Rails to not generate the database files, which is correct if you want to use MongoDB!

Next, you need to remove the sqlite gem from your gemfile and add the MongoDb gem to the gem file. Here is the Ruby Gems page for MongoDB , just copy the gemfile reference from there and paste it into your gemfile. You always need to run the bundle command after altering your gemfile

Then you run rails g mongoid:config and rails will generate the config/mongoid.yml for you.

Here is an article for reference: https://gorails.com/guides/setting-up-rails-4-with-mongodb-and-mongoid

Answer 2

MongoDB does not have a schema so you don't need migrations. Thats kind of the whole point of a schema-less database.

db/seeds.rb is just a plain Ruby file thats executed when you run rake db:seed *. You can create it by running $ touch db/seeds.rb . There is nothing magical about it.

If you are using Mongoid then everything you need is generated when you run:

$ rails g mongoid:config

So just relax.