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 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。

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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;

=> <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" => "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