1200字范文 > Laravel 5框架学习之Eloquent （laravel 的ORM）

Laravel 5框架学习之Eloquent （laravel 的ORM）

时间：2024-02-21 02:07:35

php教程|php手册

laravel,eloquent,orm,laravel框架

php教程-php手册

情侣主页源码,ubuntu卸载虚拟工具,tomcat8io类型,爬虫csv模块,php 环境构建,杭州seo搜索引擎优化是什么lzw

Laravel 的 Eloquent ORM 提供了漂亮、简洁的 ActiveRecord 实现来和数据库的互动。每个数据库表会和一个对应的「模型」互动。在开始之前，记得把 config/datab

dede58 源码终身会,vscode美妆教程,ubuntu 配置dns,tomcat设置密码,sqlite数据库最大能多大,信阳网页设计,织梦怎么进数据库,服务器有内容能备案吗,html 轮播插件,前端工程师用什么框架,爬虫乐谱,php代码学习,重庆企业seo,springboot综合示例,dede标签在哪里修改,seo企业网站源码,网页考试源代码,drupal 中文模板,内贸后台,漂亮的跳转页面,北大青鸟租房管理系统,matlab 三维程序lzw

活动报名系统源码下载,vscode如何设置背景,重置Ubuntu启动,tomcat的自动部署,爬虫伦理,php api限制,安徽霸屏seo推广,奇杰小说网站,宝贝详情模板免费下载lzw

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: _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。

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: “-03-28 06:37:22”,

timezone_type: 3,

timezone: “UTC”

}

>>> $article;

=> {

title: “My First Article”,

body: “Some content…”,

published_at: {

date: “-03-28 06:37:22”,

timezone_type: 3,

timezone: “UTC”

}

>>> $article->toArray();

=> [

“title” => “My First Article”,

“body”

=> “Some content…”,

“published_at” => {

date: “-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” => “-03-28 06:37:22”,

“created_at” => “-03-28 06:38:53”,

“updated_at” => “-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” => “-03-28 06:37:22”,

“created_at” => “-03-28 06:38:53”,

“updated_at” => “-03-28 06:42:03”

]

>>> $article = App\Article::find(1);

=> {

id: “1”,

title: “My First Update Title”,

body: “Some content…”,

published_at: “-03-28 06:37:22”,

created_at: “-03-28 06:38:53”,

updated_at: “-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: “-03-28 06:37:22”,

created_at: “-03-28 06:38:53”,

updated_at: “-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: “-03-28 06:37:22”,

created_at: “-03-28 06:38:53”,

updated_at: “-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

<?php namespace App;use Illuminate\Database\Eloquent\Model;class Article extends Model {protected $fillable = [ itle,ody,published_at ];}

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: “-03-28 06:55:19”,

timezone_type: 3,

timezone: “UTC”