在對象之間傳遞值rails

Question

如何從@message獲得first_name的值，並將其作爲@insert message params的值傳遞。

像​​但是當我使用此代碼，未定義的方法'FIRST_NAME」的#Friend :: ActiveRecord_Relation我得到一個錯誤：0x00000000020be468

@message = Friend.joins(user: :message).select("user.first_name, user.last_name").where(user_id: 1) 

@insert = Person.new(:message => 'Your request was submitted') 

Answer 1

@message = Friend.joins(user: :message).select("users.first_name as first_name, users.last_name as last_name").where(user_id: 1) 
@insert = Person.new(:message => "#{@message.first.first_name} Your request was submitted")