Ruby on rails 在ActiveRecord模型上使用“建立\u连接”时未指定适配器

下面是一个示例模型

class MyModel < ApplicationRecord
    establish_connection "other_db_#{Rails.env}"
end

class MyModel

这是database.yml文件

default: &default
  adapter: sqlite3
  pool: 5
  timeout: 5000

development:
  <<: *default
  database: db/development.sqlite3

test:
  <<: *default
  database: db/test.sqlite3

production:
  <<: *default
  database: db/production.sqlite3

other_db_development:
  <<: *default
  database: db/my_other_database_development.sqlite

other_db_production:
  <<: *default
  database: db/my_other_database_production.sqlite

default:&default
适配器：sqlite3
游泳池：5
超时：5000
发展：
要使其正常工作，您需要更改：

class MyModel < ApplicationRecord
    establish_connection "other_db_#{Rails.env}"
end

class MyModel

到

class MyModel

class MyModel < ApplicationRecord
    establish_connection "other_db_#{Rails.env}".to_sym
end