Rails get data from child table in rails

Question

I have three tables like

1. users
2. companies
3. posts

users structure

user_id | f_name | l_name |
---------------------------
  1     |   abc  |  xyz   |
---------------------------
#Model User
has_many :companies

companies

company_id  |  user_id |  company_name  |
-----------------------------------------
     1      |    1     |      otto      |
-----------------------------------------
#Model Company
belongs_to :user
has_many :posts, :foreign_key => :company_id

posts

post_id  |  company_id  |  post_title  |
----------------------------------------
   1     |      1       |    helo mart |
----------------------------------------
#Model Post
belongs_to :company

I need view post from posts table which is created by user having user_id 1 and whose company_id is 1.

I don't know how much did it mean, because I'm newbie on ruby on rails.

Answer 1

考虑到您已经获取了该用户的公司ID，查询的问题将如下所示：

@posts = User.find(1).companies.find(1).posts

Answer 2

假设公司ID是唯一的（而不是每个用户唯一），则根本不需要查找用户。

posts = Company.find(1).posts