基于数据模型的表格

Encore\Admin\Grid类用于生成基于数据模型的表格,先来个例子,数据库中有movies

CREATE TABLE `movies` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `title` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
  `director` int(10) unsigned NOT NULL,
  `describe` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
  `rate` tinyint unsigned NOT NULL,
  `released` enum(0, 1),
  `release_at` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
  `created_at` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
  `updated_at` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

对应的数据模型为App\Models\Movie,下面的代码可以生成表movies的数据表格:


use App\Models\Movie;
use Encore\Admin\Grid;
use Encore\Admin\Facades\Admin;

// 第一列显示id字段,并将这一列设置为可排序列
$grid->id('ID')->sortable();

// 第二列显示title字段,由于title字段名和Grid对象的title方法冲突,所以用Grid的column()方法代替
$grid->column('title');

// 第三列显示director字段,通过display($callback)方法设置这一列的显示内容为users表中对应的用户名
$grid->director()->display(function($userId) {
    return User::find($userId)->name;
});

// 第四列显示为describe字段
$grid->describe();

// 第五列显示为rate字段
$grid->rate();

// 第六列显示released字段,通过display($callback)方法来格式化显示输出
$grid->released('上映?')->display(function ($released) {
    return $released ? '是' : '否';
});

// 下面为三个时间字段的列显示
$grid->release_at();
$grid->created_at();
$grid->updated_at();

// filter($callback)方法用来设置表格的简单搜索框
$grid->filter(function ($filter) {

    // 设置created_at字段的范围查询
    $filter->between('created_at', 'Created Time')->datetime();
});

基本使用方法

添加列


// 直接通过字段名`username`添加列
$grid->username('用户名');

// 效果和上面一样
$grid->column('username', '用户名');

// 添加多列
$grid->columns('email', 'username' ...);

修改来源数据

$grid->model()->where('id', '>', 100);

$grid->model()->orderBy('id', 'desc');

$grid->model()->take(100);

...

其它查询方法可以参考eloquent的查询方法.

设置每页显示行数

// 默认为每页20条
$grid->paginate(15);

修改显示输出

$grid->text()->display(function($text) {
    return str_limit($text, 30, '...');
});

$grid->name()->display(function ($name) {
    return "<span class='label'>$name</span>";
});

$grid->email()->display(function ($email) {
    return "mailto:$email";
});

// 添加不存在的字段
$grid->column('column_not_in_table')->display(function () {
    return 'blablabla....';
});

display()方法接收的匿名函数绑定了当前行的数据对象,可以在里面调用当前行的其它字段数据

$grid->first_name();
$grid->last_name();

// 不存的字段列
$grid->column('full_name')->display(function () {
    return $this->first_name.' '.$this->last_name;
});

禁用创建按钮

$grid->disableCreateButton();

禁用分页条

$grid->disablePagination();

禁用查询过滤器

$grid->disableFilter();

禁用导出数据按钮

$grid->disableExport();

禁用行选择checkbox

$grid->disableRowSelector();

禁用行操作列

$grid->disableActions();

设置分页选择器选项

$grid->perPages([10, 20, 30, 40, 50]);

关联模型

一对一

users表和profiles表通过profiles.user_id字段生成一对一关联


CREATE TABLE `users` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`name` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`email` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`created_at` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
`updated_at` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

CREATE TABLE `profiles` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`user_id` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`age` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`gender` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`created_at` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
`updated_at` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

对应的数据模分别为:


class User extends Model
{
    public function profile()
    {
        return $this->hasOne(Profile::class);
    }
}

class Profile extends Model
{
    public function user()
    {
        return $this->belongsTo(User::class);
    }
}

通过下面的代码可以关联在一个grid里面:


$grid->id('ID')->sortable();

$grid->name();
$grid->email();

$grid->column('profile.age');
$grid->column('profile.gender');

//or
$grid->profile()->age();
$grid->profile()->gender();

$grid->created_at();
$grid->updated_at();

一对多

posts表和comments表通过comments.post_id字段生成一对多关联


CREATE TABLE `posts` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`title` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`content` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`created_at` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
`updated_at` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

CREATE TABLE `comments` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`post_id` int(10) unsigned NOT NULL,
`content` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
`created_at` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
`updated_at` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

对应的数据模分别为:


class Post extends Model
{
    public function comments()
    {
        return $this->hasMany(Comment::class);
    }
}

class Comment extends Model
{
    public function post()
    {
        return $this->belongsTo(Post::class);
    }
}

通过下面的代码可以让两个模型在grid里面互相关联:


    $grid = new Grid(new Post);

    $grid->id('id')->sortable();
    $grid->title();
    $grid->content();

    $grid->comments('评论数')->display(function ($comments) {
        $count = count($comments);
        return "<span class='label label-warning'>{$count}</span>";
    });

    $grid->created_at();
    $grid->updated_at();

    return $grid;

    $grid = new Grid(new Comment);
    $grid->id('id');
    $grid->post()->title();
    $grid->content();

    $grid->created_at()->sortable();
    $grid->updated_at();

    return $grid;

多对多

usersroles表通过中间表role_users产生多对多关系


CREATE TABLE `users` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `username` varchar(190) COLLATE utf8_unicode_ci NOT NULL,
  `password` varchar(60) COLLATE utf8_unicode_ci NOT NULL,
  `name` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
  `created_at` timestamp NULL DEFAULT NULL,
  `updated_at` timestamp NULL DEFAULT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `users_username_unique` (`username`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci

CREATE TABLE `roles` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `name` varchar(50) COLLATE utf8_unicode_ci NOT NULL,
  `slug` varchar(50) COLLATE utf8_unicode_ci NOT NULL,
  `created_at` timestamp NULL DEFAULT NULL,
  `updated_at` timestamp NULL DEFAULT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY `roles_name_unique` (`name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci

CREATE TABLE `role_users` (
  `role_id` int(11) NOT NULL,
  `user_id` int(11) NOT NULL,
  `created_at` timestamp NULL DEFAULT NULL,
  `updated_at` timestamp NULL DEFAULT NULL,
  KEY `role_users_role_id_user_id_index` (`role_id`,`user_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci

对应的数据模分别为:


class User extends Model
{
    public function roles()
    {
        return $this->belongsToMany(Role::class);
    }
}

class Role extends Model
{
    public function users()
    {
        return $this->belongsToMany(User::class);
    }
}

通过下面的代码可以让两个模型在grid里面互相关联:


    $grid = new Grid(new User);

    $grid->id('ID')->sortable();
    $grid->username();
    $grid->name();

    $grid->roles()->display(function ($roles) {

        $roles = array_map(function ($role) {
            return "<span class='label label-success'>{$role['name']}</span>";
        }, $roles);

        return join('&nbsp;', $roles);
    });

    $grid->created_at();
    $grid->updated_at();