Question

我无法通过rails将我的对象嵌入到具有has_many关系的对象中。

我的模特看起来像这样：

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

我试图嵌套一个json对象来返回一个会话详细信息数组，其中包含一个客户子数组和一个session_enrollments的子数组（一个对象）

我的控制器电流如下所示：

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

我也试过制作一个类方法，但我只能做到嵌套客户。

我最终没有返回客户或session_enrollments，所以我的json看起来好像我从来没有将包含添加到.as_json的右侧

Answer 1

注意你的复数。

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

无法嵌套JSON Rails

1 个答案: