README

Searchable是一个用于Laravel 4.2+和Laravel 5.8+的特质，它为Eloquent模型添加了简单的搜索功能。

Searchable允许你在表中执行搜索，并为表及其关系中的每个字段分配优先级。

此功能不是针对大规模搜索优化的，但有时你只需要让它简单一些（尽管它并不慢）。

安装

简单地将此包添加到您的composer.json文件中，并运行composer update。

composer require akr4m/advanced-search

用法

将特质添加到您的模型和搜索规则中。

use akr4m\Searchable\SearchableTrait;

class User extends \Eloquent
{
    use SearchableTrait;

    /**
     * Searchable rules.
     *
     * @var array
     */
    protected $searchable = [
        /**
         * Columns and their priority in search results.
         * Columns with higher values are more important.
         * Columns with equal values have equal importance.
         *
         * @var array
         */
        'columns' => [
            'users.first_name' => 10,
            'users.last_name' => 10,
            'users.bio' => 2,
            'users.email' => 5,
            'posts.title' => 2,
            'posts.body' => 1,
        ],
        'joins' => [
            'posts' => ['users.id','posts.user_id'],
        ],
    ];

    public function posts()
    {
        return $this->hasMany('Post');
    }

}

现在您可以使用模型进行搜索。

// Simple search
$users = User::search($query)->get();

// Search and get relations
// It will not get the relations if you don't do this
$users = User::search($query)
            ->with('posts')
            ->get();

搜索分页

就像laravel默认查询一样简单

// Search with relations and paginate
$users = User::search($query)
            ->with('posts')
            ->paginate(20);

混合查询

搜索方法与任何eloquent方法兼容。您可以这样做

// Search only active users
$users = User::where('status', 'active')
            ->search($query)
            ->paginate(20);

自定义阈值

默认接受的相关性的阈值是所有属性相关性的总和除以4。要更改此值，您可以在search()中传递第二个参数，如下所示

// Search with lower relevance threshold
$users = User::where('status', 'active')
            ->search($query, 0)
            ->paginate(20);

上述操作将按相关性顺序返回所有用户。

全文搜索

默认情况下，多词搜索词会被分割，Searchable会逐个搜索每个单词。相关性在优先排序匹配多个单词的匹配项中发挥作用。如果您想优先排序包含多词搜索（因此，不分割为单词）的匹配项，您可以通过将第三个值设置为true来启用全文搜索。示例

// Prioritize matches containing "John Doe" above matches containing only "John" or "Doe".
$users = User::search("John Doe", null, true)->get();

如果您明确只想搜索全文匹配，您可以通过将第四个参数设置为true来禁用多词分割。

// Do not include matches that only matched "John" OR "Doe".
$users = User::search("John Doe", null, true, true)->get();

它是如何工作的？

Searchable构建一个查询，通过Laravel的Eloquent搜索您的模型。以下是一个示例查询

Eloquent模型

use akr4m\Searchable\SearchableTrait;

class User extends \Eloquent
{
    use SearchableTrait;

    /**
     * Searchable rules.
     *
     * @var array
     */
    protected $searchable = [
        'columns' => [
            'first_name' => 10,
            'last_name' => 10,
            'bio' => 2,
            'email' => 5,
        ],
    ];

}

搜索

$search = User::search('Sed neque labore', null, true)->get();

结果

select `users`.*, 

-- If third parameter is set as true, it will check if the column starts with the search
-- if then it adds relevance * 30
-- this ensures that relevant results will be at top
(case when first_name LIKE 'Sed neque labore%' then 300 else 0 end) + 

-- For each column you specify makes 3 "ifs" containing 
-- each word of the search input and adds relevace to 
-- the row

-- The first checks if the column is equal to the word,
-- if then it adds relevance * 15
(case when first_name LIKE 'Sed' || first_name LIKE 'neque' || first_name LIKE 'labore' then 150 else 0 end) + 

-- The second checks if the column starts with the word,
-- if then it adds relevance * 5
(case when first_name LIKE 'Sed%' || first_name LIKE 'neque%' || first_name LIKE 'labore%' then 50 else 0 end) + 

-- The third checks if the column contains the word, 
-- if then it adds relevance * 1
(case when first_name LIKE '%Sed%' || first_name LIKE '%neque%' || first_name LIKE '%labore%' then 10 else 0 end) + 

-- Repeats with each column
(case when last_name LIKE 'Sed' || last_name LIKE 'neque' || last_name LIKE 'labore' then 150 else 0 end) + 
(case when last_name LIKE 'Sed%' || last_name LIKE 'neque%' || last_name LIKE 'labore%' then 50 else 0 end) +
(case when last_name LIKE '%Sed%' || last_name LIKE '%neque%' || last_name LIKE '%labore%' then 10 else 0 end) + 

(case when bio LIKE 'Sed' || bio LIKE 'neque' || bio LIKE 'labore' then 30 else 0 end) + 
(case when bio LIKE 'Sed%' || bio LIKE 'neque%' || bio LIKE 'labore%' then 10 else 0 end) + 
(case when bio LIKE '%Sed%' || bio LIKE '%neque%' || bio LIKE '%labore%' then 2 else 0 end) + 

(case when email LIKE 'Sed' || email LIKE 'neque' || email LIKE 'labore' then 75 else 0 end) + 
(case when email LIKE 'Sed%' || email LIKE 'neque%' || email LIKE 'labore%' then 25 else 0 end) + 
(case when email LIKE '%Sed%' || email LIKE '%neque%' || email LIKE '%labore%' then 5 else 0 end) 

as relevance 
from `users` 
group by `id` 

-- Selects only the rows that have more than
-- the sum of all attributes relevances and divided by 4
-- Ej: (20 + 5 + 2) / 4 = 6.75
having relevance > 6.75 

-- Orders the results by relevance
order by `relevance` desc