Rails has_many和has_many通过(Rails has_many and has_many through)

 我很困惑如何接近这个。 我通过会员模型连接用户和组，但我也希望用户能够创建新组。 显然，组必须属于用户，但组也通过成员资格表属于用户。 
 
 我在我的user.rb文件中有这个，但我觉得这是错的。 我是否删除了第一个而只是通过一个？ 在这种情况下，我如何在小组的创建者中工作？ 
 
class User < ApplicationRecord
  has_many :groups
  has_many :groups, through: :memberships
end
 
 换句话说，用户是许多组的成员，但也是许多组的创建者。 成员资格表只有两列（组ID和用户ID）。 此列中的用户标识用于存储属于该组成员的用户。 我对如何处理创建该组的用户感到困惑。 

I am confused on how to go about approaching this. I am connecting users and groups through the membership model, but I also want users to be able to create new groups. Clearly a group must then belong to a user, but the groups also belong to users through the memberships table. 
 
I have this in my user.rb file, but I feel it is wrong. Do I remove the first one and just have the through one? How do I work in the creator of the group in that case?
 
class User < ApplicationRecord
  has_many :groups
  has_many :groups, through: :memberships
end
 
In other words, the user is a member of many groups, but also the creator of many groups. The memberships table only has two columns (group id and user id). The user id in this column is used to store users who are members of that group. I am stuck on what to do about the user who created the group. 

原文：https://stackoverflow.com/questions/44270507