将导轨模型关联从一个模型更改为另一个

Question

我在通过organization_id将项目模型关联到组织模型时遇到问题。我开始将项目模型与用户模型相关联，但后来我改变主意并决定将每个创建的项目与创建该项目的组织关联起来。

因此，通过迁移，我插入了一个新列以将organization_id插入到项目模型中。问题是，无论何时我创建一个新项目（以组织身份登录），organization_id仍为“无”。我做错了这个协会不工作？

这是迁移文件：下面

class AddOrganizationIdToProjects < ActiveRecord::Migration 
 
    def change 
 
    \t add_column :projects, :organization_id, :integer, index: true 
 
    end 
 
end

您可以检查出项目模型和组织模式，具有相应的模式（通过注释宝石）。

工程模型（用模式）

# == Schema Information 
 
# 
 
# Table name: projects 
 
# 
 
# id    :integer   not null, primary key 
 
# name    :string 
 
# short_description :text 
 
# description  :text 
 
# image_url   :string 
 
# status   :string   default("pending") 
 
# goal    :decimal(8, 2) 
 
# expiration_date :date 
 
# created_at  :datetime   not null 
 
# updated_at  :datetime   not null 
 
# organization_id :integer 
 
# start_date  :date 
 
# 
 

 
class Project < ActiveRecord::Base 
 

 
\t belongs_to :organization 
 

 
end

组织模式（与模式）

# == Schema Information 
 
# 
 
# Table name: organizations 
 
# 
 
# id      :integer   not null, primary key 
 
# email     :string   default(""), not null 
 
# encrypted_password  :string   default(""), not null 
 
# reset_password_token :string 
 
# reset_password_sent_at :datetime 
 
# remember_created_at :datetime 
 
# sign_in_count   :integer   default(0), not null 
 
# current_sign_in_at  :datetime 
 
# last_sign_in_at  :datetime 
 
# current_sign_in_ip  :string 
 
# last_sign_in_ip  :string 
 
# created_at    :datetime   not null 
 
# updated_at    :datetime   not null 
 
# 
 

 
class Organization < ActiveRecord::Base 
 
    # Include default devise modules. Others available are: 
 
    # :confirmable, :lockable, :timeoutable and :omniauthable 
 
    devise :database_authenticatable, :registerable, 
 
     :recoverable, :rememberable, :trackable, :validatable 
 

 
    has_many :projects, dependent: :destroy 
 
end

编辑：添加ING项目控制器创建操作的要求：

\t def create 
 
\t \t @project = Project.new(project_params) 
 

 
    respond_to do |format| 
 
     if @project.save 
 
     format.html { redirect_to @project, notice: 'Project was successfully created.' } 
 
     format.json { render :show, status: :ok, location: @project } 
 
     else 
 
     format.html { render :new } 
 
     format.json { render json: @project.errors, status: :unprocessable_entity } 
 
     end 
 
    end 
 
    end

感谢您的帮助！

Answer 1

基本上你需要在创建项目时设置organization ID，它不会自动识别。像下面应该做它的东西，这会在你的projects_controller.rb文件中完成：

class ProjectsController < ApplicationsController 
    def create 
     current_organization = Organization.find() #the org id thats logged in 
     Project.create(organization: current_organization) 
     redirect_to #somewhere 
    end 
end 

Answer 2

使用单位的关联方法来创建项目时，它会自动添加的organization_ID。以下代码假定您需要的组织标识位于current_user上。

def create 
    organization = Organization.find(current_user.organization.id) 
    @project = organization.project.build(project_params) 

    respond_to do |format| 
    if @project.save 
     format.html { redirect_to @project, notice: 'Project was successfully created.' } 
     format.json { render :show, status: :ok, location: @project } 
    else 
     format.html { render :new } 
     format.json { render json: @project.errors, status: :unprocessable_entity } 
    end 
    end 
end 

http://guides.rubyonrails.org/association_basics.html#detailed-association-reference