Laravel 5 基础(七)- Eloquent (laravel 的ORM)
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2022-05-24 10:09:30
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- 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
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: "2015-03-28 06:37:22",
timezone_type: 3,
timezone: "UTC"
}
>>> $article;
=> {
title: "My First Article",
body: "Some content...",
published_at: {
date: "2015-03-28 06:37:22",
timezone_type: 3,
timezone: "UTC"
}
}
>>> $article->toArray();
=> [
"title" => "My First Article",
"body" => "Some content...",
"published_at" => {
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);
=> {
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();
=> [
{
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();
=> {
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
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(['title' => 'New Article', 'body' => 'New body', 'published_at' => Carbon\Carbon::now()]);
=> {
title: "New Article",
body: "New body",
published_at: {
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);
=> {
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()
以上就介绍了Laravel 5 基础(七)- Eloquent (laravel 的ORM),包括了方面的内容,希望对PHP教程有兴趣的朋友有所帮助。
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