Ruby on rails 无法嵌套JSON Rails

我无法通过rails嵌套具有多个贯穿关系的对象

我的模型是这样的：

class SessionDetail < ActiveRecord::Base
 has_many :session_enrollments, dependent: :destroy
 has_many :customers, through: :session_enrollments
end

class SessionEnrollment < ActiveRecord::Base
 belongs_to :customers   //column name is "customers_id"
 belongs_to :session_details //column name is "sessiondetails_id"
end

class Customer < ActiveRecord::Base
 has_many :session_enrollments
 has_many :session_details, through: :session_enrollments
end

def return_trainers_sessions
  @trainer_requests = SessionDetail.where(trainers_id: params[:trainers_id], state:     "PENDING")

  unless (!@trainer_requests.any?)
    respond_to do |format|
    msg = {:status => "SUCCESS", :messages => "Requests Found", :requests => @trainer_requests.as_json(:includes => {:customers => {:include =>:session_enrollments}})}
     format.json  { render :json => msg } # don't do msg.to_json
  end

我也尝试过创建一个类方法，但我只能尽可能地嵌套客户

---

我最终没有返回任何客户或会话注册，因此我的json看起来就像我从未将包含项添加到的右侧。正如json一样，请注意您的多元化

class SessionDetail < ActiveRecord::Base
  has_many :session_enrollments, dependent: :destroy
  has_many :customers, through: :session_enrollments
end

# a session enrollment belongs to a single customer, and a single session detail. Similarly
# the foreign key fields should be singular, customer_id, session_detail_id
class SessionEnrollment < ActiveRecord::Base
  belongs_to :customer   
  belongs_to :session_detail
end

class Customer < ActiveRecord::Base
  has_many :session_enrollments
  has_many :session_details, through: :session_enrollments
end

class SessionDetail

尝试删除

：includes=>

中的字母

s

，使其成为

：include=>

。@Trip这样做会产生500个错误。日志显示uninitialized constant SessionDetail:：Customers。您可以改为在terminal中运行该命令并查看返回结果吗？@trip抱歉，curl请求挂起，只需在下面的行上看到一个>，您可以在

除非
语句中抛出一个调试器，然后在控制台中运行它吗，然后粘贴准确的报税表？哇，谢谢！我最终制作了一个类方法，但我会尝试这个