保存mongoid模型

Question

我掀掉以下mongoid型號：

class Exercise 
    include Mongoid::Document 
    field :name, :type => String 
    field :description, :type => String 

    belongs_to :group 

    validates_presence_of :name, :description 
end 

我想通過我的控制器堅持一個模型：

class ExercisesController < ApplicationController 
    respond_to :json 

    def create 
    @exercise = Exercise.create(params[:exercise]) 
    @exercise.save! 
    respond_with @exercise 
    end 
end 

當我通過以下JSON：

"{\"_id\":\"50064f2e26a31829ca000001\",\"description\":\"Do something\",\"group_id\":\"4fbc6f5a26a3181742000004\",\"name\":\"Preacher curls\"}" 

我收到此錯誤：

Failure/Error: post :create, :exercise => exercise.to_json NoMethodError: undefined method `reject' for #

有人能看到我在做什麼錯·R

Answer 1

通，因爲這

params[:excercise] = JSON.parse("{\"_id\":\"50064f2e26a31829ca000001\",\"description\":\"Do something\",\"group_id\":\"4fbc6f5a26a3181742000004\",\"name\":\"Preacher curls\"}")