在 Laravel 6 中，从一系列的文件列表中，取出不重复的特定目录列表
1、现在表中的记录。如图1
图1
2、查询出文件列表的实现如下
$themeAssets = ThemeAsset::select('asset_key')->where('theme_id', '9994a913-4383-423c-993e-21acde47dbe3')->where('category', ThemeAsset::CATEGORY_MIGRATION)->get();
Illuminate\Database\Eloquent\Collection Object
(
[items:protected] => Array
(
[0] => Modules\ThemeStoreDb\Models\ThemeAsset Object
(
[forceDeleteVersion:protected] =>
[table:protected] => theme_asset2
[connection:protected] => mysql
[primaryKey:protected] => id
[keyType:protected] => int
[incrementing] => 1
[with:protected] => Array
(
)
[withCount:protected] => Array
(
)
[perPage:protected] => 15
[exists] => 1
[wasRecentlyCreated] =>
[attributes:protected] => Array
(
[asset_key] => migrations/migrate_cart.blade.php
)
[original:protected] => Array
(
[asset_key] => migrations/migrate_cart.blade.php
)
[changes:protected] => Array
(
)
[casts:protected] => Array
(
)
[dates:protected] => Array
(
)
[dateFormat:protected] =>
[appends:protected] => Array
(
[0] => created_at
[1] => updated_at
)
[dispatchesEvents:protected] => Array
(
)
[observables:protected] => Array
(
)
[relations:protected] => Array
(
)
[touches:protected] => Array
(
)
[timestamps] => 1
[hidden:protected] => Array
(
)
[visible:protected] => Array
(
)
[guarded:protected] => Array
(
[0] => *
)
)
[1] => Modules\ThemeStoreDb\Models\ThemeAsset Object
(
[forceDeleteVersion:protected] =>
[table:protected] => theme_asset2
[connection:protected] => mysql
[primaryKey:protected] => id
[keyType:protected] => int
[incrementing] => 1
[with:protected] => Array
(
)
[withCount:protected] => Array
(
)
[perPage:protected] => 15
[exists] => 1
[wasRecentlyCreated] =>
[attributes:protected] => Array
(
[asset_key] => migrations/migrate_collections.blade.php
)
[original:protected] => Array
(
[asset_key] => migrations/migrate_collections.blade.php
)
[changes:protected] => Array
(
)
[casts:protected] => Array
(
)
[dates:protected] => Array
(
)
[dateFormat:protected] =>
[appends:protected] => Array
(
[0] => created_at
[1] => updated_at
)
[dispatchesEvents:protected] => Array
(
)
[observables:protected] => Array
(
)
[relations:protected] => Array
(
)
[touches:protected] => Array
(
)
[timestamps] => 1
[hidden:protected] => Array
(
)
[visible:protected] => Array
(
)
[guarded:protected] => Array
(
[0] => *
)
)
)
)
3、由于需要取出文件：migrations/v2.0.28/migrate_settings_data.php 中的 v2.0.28 部分。其中有一些文件：migrations/migrate_cart.blade.php 不存在 v2.0.28 部分，所以需要先过滤掉。先后使用了集合的 filter()、mapToGroups() 方法。
$grouped = $themeAssets->filter(function ($value) {
return Str::startsWith(explode('/', $value->asset_key)[1], 'v2');
})->mapToGroups(function ($value) {
return [explode('/', $value->asset_key)[1] => $value->asset_key];
});
print_r($grouped);
exit;
4、打印结果如下，符合预期。如图2
图2
Illuminate\Support\Collection Object
(
[items:protected] => Array
(
[v2.0.20] => Illuminate\Database\Eloquent\Collection Object
(
[items:protected] => Array
(
[0] => migrations/v2.0.20/migrate_settings_data.php
)
)
[v2.0.21] => Illuminate\Database\Eloquent\Collection Object
(
[items:protected] => Array
(
[0] => migrations/v2.0.21/migrate_settings_data.php
)
)
[v2.0.28] => Illuminate\Database\Eloquent\Collection Object
(
[items:protected] => Array
(
[0] => migrations/v2.0.28/migrate_cart.php
[1] => migrations/v2.0.28/migrate_collections.php
[2] => migrations/v2.0.28/migrate_collectiontitem.php
[3] => migrations/v2.0.28/migrate_index.php
[4] => migrations/v2.0.28/migrate_product_detail.php
[5] => migrations/v2.0.28/migrate_search.php
[6] => migrations/v2.0.28/migrate_settings_data.php
)
)
[v2.1.1] => Illuminate\Database\Eloquent\Collection Object
(
[items:protected] => Array
(
[0] => migrations/v2.1.1/migrate_index.php
)
)
[v2.1.2] => Illuminate\Database\Eloquent\Collection Object
(
[items:protected] => Array
(
[0] => migrations/v2.1.2/migrate_settings_data.php
)
)
[v2.1.3] => Illuminate\Database\Eloquent\Collection Object
(
[items:protected] => Array
(
[0] => migrations/v2.1.3/migrate_cart.php
[1] => migrations/v2.1.3/migrate_collections.php
[2] => migrations/v2.1.3/migrate_collectiontitem.php
[3] => migrations/v2.1.3/migrate_index.php
[4] => migrations/v2.1.3/migrate_product_detail.php
[5] => migrations/v2.1.3/migrate_search.php
)
)
[v2.1.30] => Illuminate\Database\Eloquent\Collection Object
(
[items:protected] => Array
(
[0] => migrations/v2.1.30/migrate_settings_data.php
)
)
[v2.1.65] => Illuminate\Database\Eloquent\Collection Object
(
[items:protected] => Array
(
[0] => migrations/v2.1.65/migrate_product_detail.php
[1] => migrations/v2.1.65/migrate_settings_data.php
)
)
[v2.1.70] => Illuminate\Database\Eloquent\Collection Object
(
[items:protected] => Array
(
[0] => migrations/v2.1.70/migrate_settings_data.php
)
)
[v2.1.80] => Illuminate\Database\Eloquent\Collection Object
(
[items:protected] => Array
(
[0] => migrations/v2.1.80/migrate_product_detail.php
)
)
)
)
5、仅获取集合中的数组的键。如图3
图3
print_r(array_keys($grouped->all()));
exit;
Array
(
[0] => v2.0.20
[1] => v2.0.21
[2] => v2.0.28
[3] => v2.1.1
[4] => v2.1.2
[5] => v2.1.3
[6] => v2.1.30
[7] => v2.1.65
[8] => v2.1.70
[9] => v2.1.80
)
