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當要求資料庫連線池卻未定義時提出。

方法
N

屬性

[R] connection_name
[R] role
[R] shard

類別共用方法

new(message = nil, connection_name: nil, role: nil, shard: nil)

# File activerecord/lib/active_record/errors.rb, line 90
def initialize(message = nil, connection_name: nil, role: nil, shard: nil)
  super(message)
  @connection_name = connection_name
  @role = role
  @shard = shard
end