销毁/ Rails中删除数据库 [英] Destroy/Remove database in Rails

问题描述

是否有可能从现有的应用程序完全删除数据库和所有迁移记录等，所以我可以从头开始重新设计数据库？

Is it possible to completely remove the database and all migration records etc from an existing application so I can redesign the database from scratch?

推荐答案

通过发出耙-T 您有以下数据库任务：

By issuing rake -T you have the following database tasks:

rake db:create          # Create the database from DATABASE_URL or config/database.yml for the current Rails.env (use db:create:all to create all dbs in the config)
rake db:drop            # Drops the database using DATABASE_URL or the current Rails.env (use db:drop:all to drop all databases)
rake db:fixtures:load   # Load fixtures into the current environment's database
rake db:migrate         # Migrate the database (options: VERSION=x, VERBOSE=false)
rake db:migrate:status  # Display status of migrations
rake db:rollback        # Rolls the schema back to the previous version (specify steps w/ STEP=n)
rake db:schema:dump     # Create a db/schema.rb file that can be portably used against any DB supported by AR
rake db:schema:load     # Load a schema.rb file into the database
rake db:seed            # Load the seed data from db/seeds.rb
rake db:setup           # Create the database, load the schema, and initialize with the seed data (use db:reset to also drop the db first)
rake db:structure:dump  # Dump the database structure to db/structure.sql
rake db:version         # Retrieves the current schema version number

因此​​，为了发行捆绑EXEC耙分贝：滴：所有，如果你想删除所有的迁移，并假设你想只删除迁移，删除它们，写新的。

So to issue bundle exec rake db:drop:all and if you want to remove all the migrations, and assuming you want to remove only the migrations, delete them and write new ones.

如果你想改变你的型号太多，使用轨三维模型。

If you want to change your models too, use rails d model.

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