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這期內容當中小編將會給大家帶來有關Laravel 5框架中Eloquent 如何使用,文章內容豐富且以專業的角度為大家分析和敘述,閱讀完這篇文章希望大家可以有所收獲。
我們來生成第一個模型
代碼如下:
php artisan make:model Article
#輸出
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 Illuminate\Database\Eloquent\Model; class Article extends Model { // }
沒什么特別的,除了繼承自 Model 以外,但是具有強大的功能,這些都封裝在laravel的Model中。模型自動具有了 save() update() findXXX() 等強大的功能。
tinker 是 laravel提供的命令行工具,可以和項目進行交互。
php artisan tinker #以下是在tinker中的交互輸入 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; => <App\Article #000000005c4b7ee400000000ab91a676> {} >>> $article->title = 'My First Article'; => "My First Article" >>> $article->body = 'Some content...'; => "Some content..." >>> $article->published_at = Carbon\Carbon::now(); => <Carbon\Carbon #000000005c4b7ee600000000ab91dcb6> { date: "2015-03-28 06:37:22", timezone_type: 3, timezone: "UTC" } >>> $article; => <App\Article #000000005c4b7ee400000000ab91a676> { title: "My First Article", body: "Some content...", published_at: <Carbon\Carbon #000000005c4b7ee600000000ab91dcb6> { date: "2015-03-28 06:37:22", timezone_type: 3, timezone: "UTC" } } >>> $article->toArray(); => [ "title" => "My First Article", "body" => "Some content...", "published_at" => <Carbon\Carbon #000000005c4b7ee600000000ab91dcb6> { date: "2015-03-28 06:37:22", timezone_type: 3, timezone: "UTC" } ] >>> $article->save(); => true #查看數據結果,添加了一條記錄 >>> App\Article::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 >>> App\Article::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 = App\Article::find(1); => <App\Article #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 = App\Article::where('body', 'Some content...')->get(); => <Illuminate\Database\Eloquent\Collection #000000005c4b7e1800000000ab91a676> [ <App\Article #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 = App\Article::where('body', 'Some content...')->first(); => <App\Article #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 = App\Article::create(['title' => 'New Article', 'body' => 'New body', 'published_at' => Carbon\Carbon::now()]); Illuminate\Database\Eloquent\MassAssignmentException with message 'title'
MassAssignmentException,laravel保護我們不能直接插入記錄。比如,在一些特殊情況下我們需要直接利用表單的信息填充數據庫記錄,但是如果我們并沒有在表單中添加密碼字段,而黑客產生了密碼字段連同我們的其他字段一起送回服務器,這將產生修改密碼的危險,所以我們必須明確的告訴laravel我們的模型那些字段是可以直接填充的。
修改我們的模型文件 Article.php
<?php namespace App; use Illuminate\Database\Eloquent\Model; 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,重新進入
>>> $article = App\Article::create(['title' => 'New Article', 'body' => 'New body', 'published_at' => Carbon\Carbon::now()]); => <App\Article #000000005051b2c7000000007ec432dd> { title: "New Article", body: "New body", published_at: <Carbon\Carbon #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 >>> App\Article::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 = App\Article::find(2); => <App\Article #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自動調用save()
上述就是小編為大家分享的Laravel 5框架中Eloquent 如何使用了,如果剛好有類似的疑惑,不妨參照上述分析進行理解。如果想知道更多相關知識,歡迎關注億速云行業資訊頻道。
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