如何使用 activerecord-sinatra 向 PostqreSQL 添加行？

Question

我安装了 PostgreSQL，稍后

1 - 已安装 gem pg

2 - 已安装 gems:

gem install activerecord 
gem install sinatra-activerecord 
gem install rake

3 - 我创建了数据库连接到文件 app.rb

# app.rb 
configure :development do set :database, {adapter: "postgresql",  encoding: "unicode", database: "your_database_name", pool: 2, username: "your_username", password: "your_password"}
end

configure :production do
  set :database, {adapter: "postgresql",  encoding: "unicode", database: "your_database_name", pool: 2, username: "your_username", password: "your_password"}
end

4 - 创建模型到文件 app.rb

class Article < ActiveRecord::Base
end

5 - 创建了到 Rakefile 的迁移

require 'sinatra/activerecord'
require 'sinatra/activerecord/rake'
require './app'

6 - rake db:create_migration NAME=create_articles

7 - 通过文件迁移新建

class CreateArticles < ActiveRecord::Migration
    def change
        create_table :articles do |t|
          t.string :title
          t.string :content
          t.boolean :published, :default => false
          t.datetime :published_on, :required => false
          t.integer :likes, :default => 0
          t.timestamps null: false
        end
      end
    end

8 - 我完成了命令 db:create 和 rake db:migration

数据库已创建，显示psql控制台中的数据库。现在如何在 sinatra 中向数据库添加行？

Answer 1

要创建新文章，请使用：

Article.create(title: your_title, content: your_content, published: true, published_on: Time.now)

按 ID 查找文章：

Article.find(id)

更新文章：

article = Article.find(id)
article.update(title: your_title, content: your_content, published: true, published_on: Time.now)

删除文章记录：

article = Article.find(id)
article.destroy

增强现实文档：

坚持 - https://www.rubydoc.info/gems/activerecord/ActiveRecord/Persistence
寻找：https://www.rubydoc.info/gems/activerecord/ActiveRecord/FinderMethods
对于复杂查询：https://www.rubydoc.info/gems/activerecord/ActiveRecord/QueryMethods

如何使用 activerecord-sinatra 向 PostqreSQL 添加行？

How add line to PostqreSQL use activerecord-sinatra?

ruby

postgresql

sinatra

sinatra-activerecord