Ruby-on-rails 从架构中删除表 - Rails
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Deleting table from schema - Rails
提问by Bitwise
I want to delete a table in my schema. I created the database when I first started the project and want the table removed. What is the best way of doing this?
我想删除我的架构中的一个表。我在第一次启动项目时创建了数据库，并希望删除该表。这样做的最佳方法是什么？
I tried rails g migration drop table :installsbut that just creates a empty migration?
我试过了，rails g migration drop table :installs但这只会创建一个空的迁移？
Schema:
架构：
create_table "installs", force: :cascade do |t|
t.string "email", default: "", null: false
t.string "encrypted_password", default: "", null: false
t.string "reset_password_token"
t.datetime "reset_password_sent_at"
t.datetime "remember_created_at"
t.integer "sign_in_count", default: 0, null: false
t.datetime "current_sign_in_at"
t.datetime "last_sign_in_at"
t.string "current_sign_in_ip"
t.string "last_sign_in_ip"
t.datetime "created_at", null: false
t.datetime "updated_at", null: false
end
add_index "installs", ["email"], name: "index_installs_on_email", unique: true
add_index "installs", ["reset_password_token"], name: "index_installs_on_reset_password_token", unique: true
回答by Luka Kerr
If you create an empty migration by running:
rails g migration DropInstalls
or:rails generate migration DropInstalls
如果您通过运行创建空迁移：
rails g migration DropInstalls
或：rails generate migration DropInstalls
You can then add this into that empty migration:
然后，您可以将其添加到该空迁移中：
class DropInstalls < ActiveRecord::Migration
def change
drop_table :installs
end
end
Then run rake db:migratein the command line which should remove the Installs table
然后rake db:migrate在应该删除安装表的命令行中运行
