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在Rails应用中配置多数据库可以通过以下步骤实现:
default: &default
adapter: postgresql
encoding: unicode
pool: 5
username: postgres
password: password
host: localhost
development:
<<: *default
database: myapp_development
test:
<<: *default
database: myapp_test
production:
<<: *default
database: myapp_production
other_database:
<<: *default
database: other_database
config.active_record.database_selector = { delay: 2.seconds }
config.active_record.database_resolver = ActiveRecord::Middleware::DatabaseSelector::Resolver
config.active_record.database_resolver_context = ActiveRecord::Middleware::DatabaseSelector::Resolver::Session
config.active_record.railtie_name = "myapp"
config.databases = YAML.load_file(Rails.root.join('config', 'database.yml'))
config.databases.each do |name, db_config|
config.database_configuration = db_config.with_indifferent_access
ActiveRecord::Base.configurations[name.to_s] = config.database_configuration
end
class User < ActiveRecord::Base
establish_connection :development
end
class OtherModel < ActiveRecord::Base
establish_connection :other_database
end
通过以上步骤,就可以在Rails应用中配置多个数据库连接,并在不同的模型中使用不同的数据库连接。
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