可以使用纯粹的Eloquent用法,没有php循环,只要关系存在,就在select语句中添加一个自定义列和值给关系?我想我不知道如何更好地解释,但我会尝试......
我当前查询的json结果(eloquent)是以下json:
[
{
"id": 5,
"user_id": 3,
"category_id": 2,
"city_id": 1,
"title": "Outro teste",
"body": "999999 sdf23asd f23asd32f1 as321f32as1d f1sdf",
"image_path": "",
"status": "ACTIVE",
"expires_at": "2015-03-20 04:44:53",
"popularity": 0,
"is_favorite": "true",
"category": {
"id": 2,
"name": "Categoria 2",
"status": "ACTIVE",
"color": "#0F0",
"parent_id": null,
"type": "INTEREST",
"slug": "categoria-2",
"icon_path": null
},
"favorite": []
},
{
"id": 4,
"user_id": 3,
"category_id": 3,
"city_id": 1,
"title": "Interesse de Teste 2",
"body": "2321fads132f123d sf 12sdf sd132",
"image_path": "",
"status": "ACTIVE",
"expires_at": "2015-03-21 02:34:53",
"popularity": 0,
"is_favorite": "true",
"category": {
"id": 3,
"name": "Subcategoria 1",
"status": "ACTIVE",
"color": "#00F",
"parent_id": 1,
"type": "INTEREST",
"slug": "subcategoria-1",
"icon_path": null
},
"favorite": [
{
"id": 1,
"user_id": 3,
"favorite_id": 4,
"type": "INTEREST",
"created_at": null,
"updated_at": null
}
]
}
]
在结果is_favorite
的第一个索引中,字段值必须为" is_favorite":" false"因为不是exists()
favorite
关系,而在第二个索引中is_favorite值必须是" is_favorite":" true"因为存在关系。
我的代码获得当前的json结果我认为可以更好...我在Laravel 5.0中的noob
<?php
$Interests = \Reverse\Interest::with('category')
->where('status', '<>', 'DELETED')
->take($limit)
->offset($offset);
if (isset($allFilters['user'])) {
$Interests->where('user_id', $allFilters['user']);
}
if (isset($allFilters['popularity'])) {
$Interests->orderBy('popularity', 'desc')
->orderBy('expires_at', 'asc');
}
if (isset($allFilters['favorites'])) {
if($Interests->with('favorite')->exists()) {
$Interests->select(DB::raw('*, "true" AS is_favorite'));
}
}
$responseContent = $Interests->get();
Reverse是我的API命名空间。使用在响应标头上传递的application / json进行json返回:
<?php
// My Json Response Example
$Response = new \Illuminate\Http\Response();
$Response->header('Content-Type', 'application/json');
$Response->setContent($Interests->get());
return $Response;
答案 0 :(得分:1)
在Laravel中,在模型中添加自定义字段使用appends
属性,在这种情况下:
<?php
protected $appends = ['is_favorite'];
定义新属性的属性访问器,在本例中为:
<?php
public function getIsFavoriteAttribute() {
return $this->favorite()
->where('user_id', '=', $this->user_id)
->exists();
}
在我的案例中,最喜欢的是一种关系:
<?php
public function favorite()
{
return $this->hasMany('\Reverse\Favorite', 'favorite_id');
}
最后,当以这种方式满足以下条件时,我的favorites
过滤器被激活:
<?php
if (isset($allFilters['favorites']) and filter_var($allFilters['favorites'], FILTER_VALIDATE_BOOLEAN)) {
$Interests->has('favorite');
}
我认为存在编写此代码的更好方法......如果您知道,可以解释一下吗?