如何与现有数据行创建关系关联？

Question

我在Ruby on Rails文档中找不到任何相关信息，也无法在线找到任何信息。如何向现有数据行添加关系？

单词模型：

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控制台：

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?

感谢您的帮助！

Answer 1

您可以在new_word数组中加入word.synonyms，例如：

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