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[Laravel] Laravel的基本数据库操作部分,laravel数据库
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[Laravel] Laravel的基本数据库操作部分,laravel数据库

Jun 13, 2016 am 08:42 AM
laravel Basic operate database of part

[Laravel] Laravel的基本数据库操作部分,laravel数据库

[laravel] laravel的数据库配置

找到程序目录结构下.env文件

配置基本的数据库连接信息

DB_HOST=127.0.0.1

DB_PORT=3306

DB_DATABASE=blog

DB_USERNAME=root

DB_PASSWORD=root

修改完.env文件需要重启服务

 

 

[laravel] laravel的数据库入门

 

控制器中导入DB数据库操作类,use DB

使用DB类的静态方法select来查询数据库,DB::select(),参数:sql语句,参数值数组

例如:$user=DB::select("select * from article where id=?",array("1"));

获取到一个数组,数组中的每一个结果是一个StdClass对象

 

<?<span>php
namespace App\Http\Controllers\Index;
</span><span>use</span><span> App\Http\Controllers\Controller;
</span><span>use</span><span> DB;
</span><span>class</span> IndexController <span>extends</span><span> Controller{
    </span><span>public</span> <span>function</span><span> index(){
        </span><span>$data</span>=<span>array</span><span>();
        </span><span>$data</span>['title']="Index控制器"<span>;

        </span><span>//</span><span> 第一种</span>
        <span>$user</span>=DB::select("select * from article where id=?",<span>array</span>("1"<span>));
        </span><span>foreach</span> (<span>$user</span> <span>as</span> <span>$v</span><span>) {
            </span><span>echo</span> <span>$v</span>-><span>title;
        }
        </span><span>//</span><span> 第二种</span>
        <span>$users</span>=DB::table("article")-><span>get();
        </span><span>foreach</span> (<span>$user</span> <span>as</span> <span>$v</span><span>) {
            </span><span>echo</span> <span>$v</span>-><span>title;
        }
        </span><span>return</span> view("index.index",<span>$data</span><span>);
    }
}</span>
Copy after login

 

使用查询构造器

使用DB::table(),得到查询构造器对象,参数:表名

调用Builder对象的get()方法,得到数组数据

例如:$users=DB::table("article")->get();

查询构造器是链式调用的,还有其他方法,可以去查看文档

 

[laravel] 数据库的迁移

 

使用Artisan命令创建迁移,make:migration 名称 –create 表名

例如:php artisan make:migration create_users_table --create=users

此命令会在database/migrations目录下面创建一个迁移文件

 

打开生成的迁移文件,在up方法里面进行字段的创建,这里会用到数据库的结构构造器Schema

 

运行迁移命令,使用命令 php artisan migrate,会在数据库中自动创建表

 

 

 

[laravel] Eloquent模型

 

使用Eloquent模型为表建立映射模型ORM,使用Artisan命令 make:model 模型名称

例如:php artisan make:model User

在app目录下生成一个User.php的模型文件

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