Laravel 5框架学习之Eloquent （laravel 的ORM）

我们来生成第一个模型
复制代码代码如下:
php artisan make:model Article
#输出
Model created successfully.
Created Migration: 2015_03_28_062517_create_articles_table

查看一下生成的文件 app/Article.php

<?php namespace App;use IlluminateDatabaseEloquentModel;class Article extends Model { //}

没什么特别的，除了继承自 Model 以外，但是具有强大的功能，这些都封装在laravel的Model中。模型自动具有了 save（） update（） findXXX（）等强大的功能。
tinker 是 laravel提供的命令行工具，可以和项目进行交互。

php artisan tinker#以下是在tinker中的交互输入Psy Shell v0.4.1 （PHP 5.4.16 — cli） by Justin Hileman>>> $name = "zhang jinglin";=> "zhang jinglin">>> $name=> "zhang jinglin">>> $article = new AppArticle;=> <AppArticle #000000005c4b7ee400000000ab91a676> {}>>> $article->title = "My First Article";=> "My First Article">>> $article->body = "Some content...";=> "Some content...">>> $article->published_at = CarbonCarbon::now（）;=> <CarbonCarbon #000000005c4b7ee600000000ab91dcb6> {date: "2015-03-28 06:37:22",timezone_type: 3,timezone: "UTC"}>>> $article;=> <AppArticle #000000005c4b7ee400000000ab91a676> {title: "My First Article",body: "Some content...",published_at: <CarbonCarbon #000000005c4b7ee600000000ab91dcb6> {date: "2015-03-28 06:37:22",timezone_type: 3,timezone: "UTC"}}>>> $article->toArray（）;=> ["title"=> "My First Article","body" => "Some content...","published_at" => <CarbonCarbon #000000005c4b7ee600000000ab91dcb6> {date: "2015-03-28 06:37:22",timezone_type: 3,timezone: "UTC"}]>>> $article->save（）;=> true#查看数据结果，添加了一条记录>>> AppArticle::all（）->toArray（）;=> [["id"=> "1","title"=> "My First Article","body" => "Some content...","published_at" => "2015-03-28 06:37:22","created_at"=> "2015-03-28 06:38:53","updated_at"=> "2015-03-28 06:38:53"]]>>> $article->title = "My First Update Title";=> "My First Update Title">>> $article->save（）;=> true>>> AppArticle::all（）->toArray（）;=> [["id"=> "1","title"=> "My First Update Title","body" => "Some content...","published_at" => "2015-03-28 06:37:22","created_at"=> "2015-03-28 06:38:53","updated_at"=> "2015-03-28 06:42:03"]]>>> $article = AppArticle::find（1）;=> <AppArticle #000000005c4b7e1600000000ab91a676> {id: "1",title: "My First Update Title",body: "Some content...",published_at: "2015-03-28 06:37:22",created_at: "2015-03-28 06:38:53",updated_at: "2015-03-28 06:42:03"}>>> $article = AppArticle::where（"body", "Some content..."）->get（）;=> <IlluminateDatabaseEloquentCollection #000000005c4b7e1800000000ab91a676> [<AppArticle #000000005c4b7e1b00000000ab91a676> {id: "1",title: "My First Update Title",body: "Some content...",published_at: "2015-03-28 06:37:22",created_at: "2015-03-28 06:38:53",updated_at: "2015-03-28 06:42:03"}]>>> $article = AppArticle::where（"body", "Some content..."）->first（）;=> <AppArticle #000000005c4b7e1900000000ab91a676> {id: "1",title: "My First Update Title",body: "Some content...",published_at: "2015-03-28 06:37:22",created_at: "2015-03-28 06:38:53",updated_at: "2015-03-28 06:42:03"}>>> >>> $article = AppArticle::create（["title" => "New Article", "body" => "New body", "published_at" => CarbonCarbon::now（）]）;IlluminateDatabaseEloquentMassAssignmentException with message "title"

MassAssignmentException，laravel保护我们不能直接插入记录。比如，在一些特殊情况下我们需要直接利用表单的信息填充数据库记录，但是如果我们并没有在表单中添加密码字段，而黑客产生了密码字段连同我们的其他字段一起送回服务器，这将产生修改密码的危险，所以我们必须明确的告诉laravel我们的模型那些字段是可以直接填充的。
修改我们的模型文件 Article.php

<?php namespace App;use IlluminateDatabaseEloquentModel;class Article extends Model { protected $fillable = ["title","body","published_at"];}

表示，title, body, published_at 是可以直接填充的。
退出 tinker，重新进入

>>> $article = AppArticle::create（["title" => "New Article", "body" => "New body", "published_at" => CarbonCarbon::now（）]）;=> <AppArticle #000000005051b2c7000000007ec432dd> {title: "New Article",body: "New body",published_at: <CarbonCarbon #000000005051b2c6000000007ec4081d> {date: "2015-03-28 06:55:19",timezone_type: 3,timezone: "UTC"},updated_at: "2015-03-28 06:55:19",created_at: "2015-03-28 06:55:19",id: 2}# It"s ok>>> AppArticle::all（）->toArray（）;=> [["id"=> "1","title"=> "My First Update Title","body" => "Some content...","published_at" => "2015-03-28 06:37:22","created_at"=> "2015-03-28 06:38:53","updated_at"=> "2015-03-28 06:42:03"],["id"=> "2","title"=> "New Article","body" => "New body","published_at" => "2015-03-28 06:55:19","created_at"=> "2015-03-28 06:55:19","updated_at"=> "2015-03-28 06:55:19"]]>>> $article = AppArticle::find（2）;=> <AppArticle #000000005051b22b000000007ec432dd> {id: "2",title: "New Article",body: "New body",published_at: "2015-03-28 06:55:19",created_at: "2015-03-28 06:55:19",updated_at: "2015-03-28 06:55:19"}>>> $article->update（["body" => "New Updaet Body"]）;=> true#update自动调用save（）

以上所述就是本文的全部内容了，希望能够对大家学习Laravel5框架有所帮助。