これをLaravelの方法で整理するのはあまり運がありませんでした。そこで、私は 2 つの質問を投げかけます。
私は車を持っていて、その車は多くの機能を持つことができますが、その機能も機能タイプで区切られていることを考えると、その車の機能タイプを区切ってすべての機能を返すにはどうすればよいですか?
4 つのテーブルがあり、listings_features がピボット テーブルです。
- リスティング (id)
- listings_features (listing_id、feature_id)
- listings_features_types (id、タイプ)
- listings_features_values (id、listing_feature_type_id、値)
必要なものを生成する次のコードがありますが、それを使用すると、Laravelエラーが発生します...「文字列のメンバー関数addEagerConstraints()への呼び出し」...そのように呼び出すためです:
Listing::with(
'features',
)->get();
私が望む形式でデータを生成するために使用しているコードは(不動ではありません)
public function features()
{
$out = array();
$features = $this->hasMany('App\Models\ListingFeature', 'listing_id', 'id')->select('feature_id')->get();
$types = ListingFeatureType::all();
foreach($types as $key => $obj){
$out[$key]['listing_feature_type_id'] = $obj->id;
$out[$key]['name'] = $obj->listing_feature_type;
$out[$key]['features'] = ListingFeatureValue::whereIn('id', $features->toArray())->where('listing_feature_type_id', '=', $obj->id)->get()->toArray();
}
return json_encode($out);
}
どちらが返されますか:
[
{
"listing_feature_type_id": "0f40888c-3b09-40ed-aef6-0fddc1a155b6",
"name": "Safety",
"features": [
{
"id": "0ed0ad63-a6ed-4818-8c6f-ee048694dcd9",
"listing_feature_type_id": "0f40888c-3b09-40ed-aef6-0fddc1a155b6",
"listing_feature_text": "Anti-Lock Brakes"
},
{
"id": "37abeef2-dc22-4995-8503-f89962242ea6",
"listing_feature_type_id": "0f40888c-3b09-40ed-aef6-0fddc1a155b6",
"listing_feature_text": "Collision Detection"
},
{
"id": "3c0728e1-91f7-4f44-ac0b-429eda816692",
"listing_feature_type_id": "0f40888c-3b09-40ed-aef6-0fddc1a155b6",
"listing_feature_text": "Dual Airbags"
},
{
"id": "4255b8b4-e71c-4059-8a22-1b9894512564",
"listing_feature_type_id": "0f40888c-3b09-40ed-aef6-0fddc1a155b6",
"listing_feature_text": "Side Airbags"
}
]
},
{
"listing_feature_type_id": "84dcce5c-34b9-4c8b-9066-5b20a42cf4cd",
"name": "Interior",
"features": [
{
"id": "1b89581e-1a30-4dce-9455-ab0ad4c49bcf",
"listing_feature_type_id": "84dcce5c-34b9-4c8b-9066-5b20a42cf4cd",
"listing_feature_text": "Privacy Glass"
},
{
"id": "59e3628f-3cef-4447-9cb2-71be4a3046a4",
"listing_feature_type_id": "84dcce5c-34b9-4c8b-9066-5b20a42cf4cd",
"listing_feature_text": "Onboard GPS"
},
{
"id": "66fe416b-98dc-45c8-979d-78f2ea7fe876",
"listing_feature_type_id": "84dcce5c-34b9-4c8b-9066-5b20a42cf4cd",
"listing_feature_text": "In-dash Navigation"
},
{
"id": "8fe836a3-5596-4306-aac1-bae4cb596e20",
"listing_feature_type_id": "84dcce5c-34b9-4c8b-9066-5b20a42cf4cd",
"listing_feature_text": "Power Windows"
},
{
"id": "e4addb5a-1b26-4ae3-b0ee-3b8bce892fb9",
"listing_feature_type_id": "84dcce5c-34b9-4c8b-9066-5b20a42cf4cd",
"listing_feature_text": "Tinted Windows"
},
{
"id": "f95b8253-a2b8-4bfc-90c0-0fc656c3f200",
"listing_feature_type_id": "84dcce5c-34b9-4c8b-9066-5b20a42cf4cd",
"listing_feature_text": "CD Player"
}
]
},
{
"listing_feature_type_id": "8d16e8ea-3d38-48dc-8e56-00d1cc736f0d",
"name": "Exterior",
"features": [
{
"id": "3aa6dd05-dd3a-4e93-ad06-295687a8dda1",
"listing_feature_type_id": "8d16e8ea-3d38-48dc-8e56-00d1cc736f0d",
"listing_feature_text": "Spoiler"
}
]
}
]
モデルは次のとおりです(非常に基本的なもので、始めたばかりです):
<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Model;
class ListingFeatureValue extends Model
{
protected $table = 'listings_features_values';
public $timestamps = false;
public $incrementing = false;
public function type() {
return $this->belongsTo('App\Models\ListingFeatureType', 'listing_feature_type_id', 'id');
}
}
<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Model;
class ListingFeatureType extends Model
{
protected $table = 'listings_features_types';
public $timestamps = false;
public $incrementing = false;
public function values() {
return $this->hasMany('App\Models\ListingFeatureValue', 'listing_feature_type_id', 'id');
}
}
<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Model;
class ListingFeature extends Model
{
protected $table = 'listings_features';
public $timestamps = false;
public $incrementing = false;
}
同じ結果セットを達成するためにLaravelモデルの関係を作成するにはどうすればよいですか?または、上記のように呼び出して、エラーの発生を止めるにはどうすればよいですか?
ここまでできたら、ありがとう!
アップデート:
そのままでは機能しませんでした。テーブル名を指定できるように、beensToManyThrough が必要なように感じさせる SQL エラーが発生しました。
SQLSTATE[42S02]: Base table or view not found: 1146 Table 'ad_l5.listing_listing_feature' doesn't exist (SQL: select `listings_features`.*, `listing_listing_feature`.`listing_id` as `pivot_listing_id`, `listing_listing_feature`.`listing_feature_id` as `pivot_listing_feature_id` from `listings_features` inner join `listing_listing_feature` on `listings_features`.`id` = `listing_listing_feature`.`listing_feature_id` where `listing_listing_feature`.`listing_id` in (b266c874-1cef-4f49-b65f-f91ddaaf6aee, e93674ca-3f82-45d8-9961-e8569cac164b))
ただし、@ Carter Fort から以下の回答として投稿された正確なコードを使用し、 features() メソッドを
return $this->belongsToMany(ListingFeatureValue::class, 'listings_features', 'listing_id', 'feature_id');
また、モデル ListingFeatureValue に追加します
public function type()
{
return $this->belongsTo(ListingFeatureType::class, 'listing_feature_type_id', 'id');
}
次の出力が得られます。
"featuresByType": {
"": [
{
"id": "3aa6dd05-dd3a-4e93-ad06-295687a8dda1",
"listing_feature_type_id": "8d16e8ea-3d38-48dc-8e56-00d1cc736f0d",
"listing_feature_text": "Spoiler",
"pivot": {
"listing_id": "e93674ca-3f82-45d8-9961-e8569cac164b",
"feature_id": "3aa6dd05-dd3a-4e93-ad06-295687a8dda1"
},
"type": {
"id": "8d16e8ea-3d38-48dc-8e56-00d1cc736f0d",
"listing_feature_type": "Exterior"
}
},
{
"id": "f95b8253-a2b8-4bfc-90c0-0fc656c3f200",
"listing_feature_type_id": "84dcce5c-34b9-4c8b-9066-5b20a42cf4cd",
"listing_feature_text": "CD Player",
"pivot": {
"listing_id": "e93674ca-3f82-45d8-9961-e8569cac164b",
"feature_id": "f95b8253-a2b8-4bfc-90c0-0fc656c3f200"
},
"type": {
"id": "84dcce5c-34b9-4c8b-9066-5b20a42cf4cd",
"listing_feature_type": "Interior"
}
},
{
"id": "66fe416b-98dc-45c8-979d-78f2ea7fe876",
"listing_feature_type_id": "84dcce5c-34b9-4c8b-9066-5b20a42cf4cd",
"listing_feature_text": "In-dash Navigation",
"pivot": {
"listing_id": "e93674ca-3f82-45d8-9961-e8569cac164b",
"feature_id": "66fe416b-98dc-45c8-979d-78f2ea7fe876"
},
"type": {
"id": "84dcce5c-34b9-4c8b-9066-5b20a42cf4cd",
"listing_feature_type": "Interior"
}
},
{
"id": "0ed0ad63-a6ed-4818-8c6f-ee048694dcd9",
"listing_feature_type_id": "0f40888c-3b09-40ed-aef6-0fddc1a155b6",
"listing_feature_text": "Anti-Lock Brakes",
"pivot": {
"listing_id": "e93674ca-3f82-45d8-9961-e8569cac164b",
"feature_id": "0ed0ad63-a6ed-4818-8c6f-ee048694dcd9"
},
"type": {
"id": "0f40888c-3b09-40ed-aef6-0fddc1a155b6",
"listing_feature_type": "Safety"
}
},
...
それは私がいたよりも優れていますが、結果がタイプごとにグループ化され、タイプが添付された各機能ではなく、その中の機能でグループ化されていると便利です. 表示用の解析が難しくなります。これまで助けてくれてありがとう!
更新 2
これらは私のスキーマファイルです:
// listings
Schema::create('listings', function (Blueprint $table) {
$table->string('id');
$table->string('title');
});
// listings to features pivot
Schema::create('listings_features', function (Blueprint $table) {
$table->string('listing_id');
$table->string('feature_id');
});
// feature types (i.e. Safety)
Schema::create('listings_features_types', function(Blueprint $table){
$table->string('id');
$table->string('listing_feature_type');
});
// feature values (i.e. Anti-Lock Brakes)
Schema::create('listings_features_values', function(Blueprint $table){
$table->string('id');
$table->string('listing_feature_type_id'); // links to listings_features_types
$table->string('listing_feature_text');
});
更新3 以下の回答から変更を加えます(すべてのコードが機能したら投稿します)私が望むものに近づきます。
"features": [
{
"id": "3aa6dd05-dd3a-4e93-ad06-295687a8dda1",
"listing_feature_type_id": "8d16e8ea-3d38-48dc-8e56-00d1cc736f0d",
"listing_feature_text": "Spoiler",
"pivot": {
"listing_id": "e93674ca-3f82-45d8-9961-e8569cac164b",
"feature_id": "3aa6dd05-dd3a-4e93-ad06-295687a8dda1"
},
"type": {
"id": "8d16e8ea-3d38-48dc-8e56-00d1cc736f0d",
"listing_feature_type": "Exterior"
}
},
{
"id": "f95b8253-a2b8-4bfc-90c0-0fc656c3f200",
"listing_feature_type_id": "84dcce5c-34b9-4c8b-9066-5b20a42cf4cd",
"listing_feature_text": "CD Player",
"pivot": {
"listing_id": "e93674ca-3f82-45d8-9961-e8569cac164b",
"feature_id": "f95b8253-a2b8-4bfc-90c0-0fc656c3f200"
},
"type": {
"id": "84dcce5c-34b9-4c8b-9066-5b20a42cf4cd",
"listing_feature_type": "Interior"
}
},
{
"id": "66fe416b-98dc-45c8-979d-78f2ea7fe876",
"listing_feature_type_id": "84dcce5c-34b9-4c8b-9066-5b20a42cf4cd",
"listing_feature_text": "In-dash Navigation",
"pivot": {
"listing_id": "e93674ca-3f82-45d8-9961-e8569cac164b",
"feature_id": "66fe416b-98dc-45c8-979d-78f2ea7fe876"
},
"type": {
"id": "84dcce5c-34b9-4c8b-9066-5b20a42cf4cd",
"listing_feature_type": "Interior"
}
// .... ]
私が欲しいのは:
{
"feature_types":[
{
"type":{
"id":"8d16e8ea-3d38-48dc-8e56-00d1cc736f0d",
"listing_feature_type":"Interior",
"features":[
{
"id":"3aa6dd05-dd3a-4e93-ad06-295687a8dda1",
"listing_feature_type_id":"8d16e8ea-3d38-48dc-8e56-00d1cc736f0d",
"listing_feature_text":"GPS"
},
{
"id":"66fe416b-98dc-45c8-979d-78f2ea7fe876",
"listing_feature_type_id":"84dcce5c-34b9-4c8b-9066-5b20a42cf4cd",
"listing_feature_text":"In-dash Navigation"
},
] "pivot":{
"listing_id":"e93674ca-3f82-45d8-9961-e8569cac164b",
"feature_id":"f95b8253-a2b8-4bfc-90c0-0fc656c3f200"
}
}
}
]
}