Question

我在运行rake db：migrate时出现问题，即使在rake db：reset之后我也收到错误，并且它说运行rake db：migrate并且具有相同的错误。我该怎么做才能让它发挥作用并进行迁移

SQLite3::SQLException: table "users" already exists: CREATE TABLE "users" ("id" INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, "username" varchar(255), "password_digest" varchar(255), "created_at" datetime, "updated_at" datetime) /Users/alextuazon/.rvm/gems/ruby-2.1.0/gems/sqlite3-1.3.9/lib/sqlite3/database.rb:91:in `initialize'
/Users/alextuazon/.rvm/gems/ruby-2.1.0/gems/sqlite3-1.3.9/lib/sqlite3/database.rb:91:in `new'
/Users/alextuazon/.rvm/gems/ruby-2.1.0/gems/sqlite3-1.3.9/lib/sqlite3/database.rb:91:in `prepare'
/Users/alextuazon/.rvm/gems/ruby-2.1.0/gems/sqlite3-1.3.9/lib/sqlite3/database.rb:134:in `execute'
/Users/alextuazon/.rvm/gems/ruby-2.1.0/gems/activerecord-4.1.2/lib/active_record/connection_adapters/sqlite3_adapter.rb:334:in `block in execute'

Answer 1

执行rake db:drop删除表格，然后rake db:migrate创建它们以及迁移所做的所有其他内容。

编辑：另外，阅读Difference between rake db:migrate db:reset and db:schema:load答案可能会有所帮助

Rake db：db：reset后迁移错误

1 个答案: