Laravel 5框架学习之Eloquent （laravel 的ORM）【PHP】

后端开发|php教程

laravel,eloquent,orm,laravel框

后端开发-php教程

我们来生成第一个模型

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php artisan make:model Article

#输出

Model created successfully.

Created Migration: _03_28_062517_create_articles_table

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查看一下生成的文件 app/Article.php

<?php namespace App;use Illuminate\Database\Eloquent\Model;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 App\Article;=> {}>>> $article->title = My First Article;=> "My First Article">>> $article->body = Some content...;=> "Some content...">>> $article->published_at = Carbon\Carbon::now();=> { date: "-03-28 06:37:22", timezone_type: 3, timezone: "UTC" }>>> $article;=> { title: "My First Article", body: "Some content...", published_at: {date: "-03-28 06:37:22",timezone_type: 3,timezone: "UTC" } }>>> $article->toArray();=> [ "title" => "My First Article", "body"=> "Some content...", "published_at" => {date: "-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>>> App\Article::all()->toArray();=> [ ["id"=> "1","title" => "My First Article","body"=> "Some content...","published_at" => "-03-28 06:37:22","created_at" => "-03-28 06:38:53","updated_at" => "-03-28 06:38:53" ] ]>>> $article->title = My First Update Title;=> "My First Update Title">>> $article->save();=> true>>> App\Article::all()->toArray();=> [ ["id"=> "1","title" => "My First Update Title","body"=> "Some content...","published_at" => "-03-28 06:37:22","created_at" => "-03-28 06:38:53","updated_at" => "-03-28 06:42:03" ] ] >>> $article = App\Article::find(1);=> { id: "1", title: "My First Update Title", body: "Some content...", published_at: "-03-28 06:37:22", created_at: "-03-28 06:38:53", updated_at: "-03-28 06:42:03" }>>> $article = App\Article::where(ody, Some content...)->get();=> [{id: "1",title: "My First Update Title",body: "Some content...",published_at: "-03-28 06:37:22",created_at: "-03-28 06:38:53",updated_at: "-03-28 06:42:03" } ]>>> $article = App\Article::where(ody, Some content...)->first();=> { id: "1", title: "My First Update Title", body: "Some content...", published_at: "-03-28 06:37:22", created_at: "-03-28 06:38:53", updated_at: "-03-28 06:42:03" }>>> >>> $article = App\Article::create([ itle => New Article, ody => New body, published_at => Carbon\Carbon::now()]);Illuminate\Database\Eloquent\MassAssignmentException with message itle

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 Illuminate\Database\Eloquent\Model;class Article extends Model { protected $fillable = [ itle, ody, published_at ];}

表示，title, body, published_at 是可以直接填充的。

退出 tinker，重新进入

>>> $article = App\Article::create([ itle => New Article, ody => New body, published_at => Carbon\Carbon::now()]);=> { title: "New Article", body: "New body", published_at: {date: "-03-28 06:55:19",timezone_type: 3,timezone: "UTC" }, updated_at: "-03-28 06:55:19", created_at: "-03-28 06:55:19", id: 2 } # Its ok>>> App\Article::all()->toArray();=> [ ["id"=> "1","title" => "My First Update Title","body"=> "Some content...","published_at" => "-03-28 06:37:22","created_at" => "-03-28 06:38:53","updated_at" => "-03-28 06:42:03" ], ["id"=> "2","title" => "New Article","body"=> "New body","published_at" => "-03-28 06:55:19","created_at" => "-03-28 06:55:19","updated_at" => "-03-28 06:55:19" ] ]>>> $article = App\Article::find(2);=> { id: "2", title: "New Article", body: "New body", published_at: "-03-28 06:55:19", created_at: "-03-28 06:55:19", updated_at: "-03-28 06:55:19" }>>> $article->update([ody => 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。