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。