从 sqlite3 切换到 Postgres 后的关系问题

Question

尝试访问 index#bills 页面时出现此错误：

ActiveRecord::StatementInvalid in BillsController#index
PG::UndefinedTable: ERROR: relation "bills" does not exist LINE 5: 
WHERE a.attrelid = '"bills"'::regclass ^ : SELECT a.attname, format_type(a.atttypid, a.atttypmod), pg_get_expr(d.adbin, d.adrelid), 
a.attnotnull, a.atttypid, a.atttypmod FROM pg_attribute a LEFT JOIN 
pg_attrdef d ON a.attrelid = d.adrelid AND a.attnum = d.adnum WHERE 
a.attrelid = '"bills"'::regclass AND a.attnum > 0 AND NOT a.attisdropped 
ORDER BY a.attnum

我按照本指南了解如何从 Sqlite3 切换到 Postgres： http://www.daveferrara1.com/ruby-in-rails-switch-from-sqlite3-to-postgres/

以下是有关我的应用的一些信息：

1. 我有三个模型，Property、bill 和 resident。我可以访问居民和财产的索引页面，我可以创建新财产并对其进行编辑，但不能使用账单。
2. 切换后出现此问题。在切换到 Postgres 之前它运行良好。

3. 这就是我的 database.yml 的样子：

   development:
     adapter: postgresql
     encoding: unicode
     database: demo_test_development
     pool: 5
     username: 
     password:
     timeout: 5000
   
   test:
     adapter: postgresql
     encoding: unicode
     database: demo_test_test
     pool: 5
     username: 
     password:
     timeout: 5000
   
   production:
     adapter: postgresql
     encoding: utf8
     database: demo_test_production
     pool: 5
     username: 
     password:
   

4. 我的模型：

   class Bill < ActiveRecord::Base
     belongs_to :property
     belongs_to :user
     belongs_to :resident
     has_many :photos
   end
   
   class Property < ActiveRecord::Base
     belongs_to :user
     has_many :photos
     has_one :resident
     has_many :bills    
     validate :address , :city , :country
   end
   
   class Resident < ActiveRecord::Base
       belongs_to :user
       has_many :photos
       has_one :property
       has_many :bills  
       validates_presence_of :name
   end
   

5. 这是我的 BillsController 显示错误的地方：

   class BillsController < ApplicationController
     before_action :set_bill, only: [:show, :edit, :update]
     before_action :authenticate_user!
   
     def index
       @bills = current_user.bills
     end
   
     def show
       @bill = Bill.find(params[:id])
       @photos = @bill.photos
   
     end
   
     def new
       @bill = current_user.bills.build
     end
   
     def create
       @bill = current_user.bills.build(bill_params)
       if @bill.save
         if params[:images]
           params[:images].each do |image|
             @bill.photos.create(image: image)
           end
         end
   
         @photos = @bill.photos
         redirect_to edit_bill_path(@bill), notice: "Saved"
       else
         render :new
       end
     end
   
     def edit
       if current_user.id == @bill.user.id
         @photos = @bill.photos
       else
         redirect_to root_path, notice: "You don't have access to this page"
       end
     end
   
     def update
       if @bill.update(bill_params)
         if params[:images]
           params[:images].each do |image|
             @bill.photos.create(image: image)
           end
         end
   
         redirect_to edit_bill_path(@bill), notice: "Updated"
       else
         render :edit
       end
     end
   
     private
   
     def set_bill
       @bill = Bill.find(params[:id])
     end
   
     def bill_params
       params.require(:bill).permit(:due_date, :amount, :bill_type, :bill_status, :description, :property_id, :resident_id)
     end
   end
   

Answer 1

表名是“Bills”，但您的查询正在查找“bills”。那是不同的名字！