我运行了rake db:migrate，并在终端中遇到此错误
SQLite3::SQLException: no such table: admin_users: ALTER TABLE "admin_users" ADD "username" varchar(25)/Users/IsaiahxD/.rvm/gems/ruby-2.2.1/gems/sqlite3-1.3.10/lib/sqlite3/database.rb:91:in `initialize'
/Users/IsaiahxD/.rvm/gems/ruby-2.2.1/gems/sqlite3-1.3.10/lib/sqlite3/database.rb:91:in `new'
/Users/IsaiahxD/.rvm/gems/ruby-2.2.1/gems/sqlite3-1.3.10/lib/sqlite3/database.rb:91:in `prepare'
/Users/IsaiahxD/.rvm/gems/ruby-2.2.1/gems/sqlite3-1.3.10/lib/sqlite3/database.rb:134:in `execute'
/Users/IsaiahxD/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.3/lib/active_record/connection_adapters/sqlite3_adapter.rb:329:in `block in execute'
/Users/IsaiahxD/.rvm/gems/ruby-2.2.1/gems/activerecord-4.2.3/lib/active_record/connection_adapters/abstract_adapter.rb:473:in `block in log'
我调查了我的alter_user.rb文件
class AlterUsers < ActiveRecord::Migration这是文件20150825065823_alter_users.rb
def up
rename_table("users", "admin_users.broken")
add_column("admin_users", "username", :string, :limit => 25, :after => "email" )
change_column("admin_users", "email", :string, :limit => 100)
rename_column("admin_users", "broken", "hashed_password")
puts "*** Adding an index is next ***"
add_index("admin_users", "username")
end
def down
remove_index("admin_users", "username")
rename_column("admin_users", "hashed_password", "password")
change_column("admin_users", "email", :string, :default => "" , :null => false)
remove_column("admin_users", "username")
rename_table("admin_users", "users")
end
最佳答案
在#up方法中，您要向admin_users添加列，但尚未定义该表。
代替:rename_table("users", "admin_users.broken")
尝试:rename_table("users", "admin_users")
关于ruby - rake db :migrate returns with error，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32315636/