如何創建與現有數據行的關係關聯？

Question

我在Ruby on Rails文檔中找不到這方面的任何信息，也無法在網上找到任何信息。如何添加與現有數據行的關係？

字模型：

class Word < ActiveRecord::Base 
    has_and_belongs_to_many :synonyms, class_name: "Word", foreign_key: "word_id", join_table: "word_synonyms", association_foreign_key: "synonym_id" 
end 

Rails的控制檯：

word = Word.create(name:'test') 
word.synonyms.create(name:"experiment") # This is how I would associate it normally 

new_word = Word.create(name:'rate') 

#How do I associate word with new_word? 

感謝您的幫助！

Answer 1

可以包括word.synonyms陣列像這樣在new_word：

word.synonyms << new_word

Answer 2

word = Word.create(name:'test') 
word.synonyms.create(name:"experiment") 

new_word = Word.create(name:'rate') 
word.synonyms << new_word