Laravel 5框架学习之Eloquent (laravel 的ORM)

我们来生成第一个模型

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。

Laravel 5框架学习之Eloquent (laravel 的ORM)

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