我正在从数据库中检索实体，但是我确实有用于链接用户和实体的数据透视表以及我想要检索用户的每个实体，问题是我不知道如何在一个数据库中使用一个集合。 laravel控制器功能：
public function handle()
{
$dir = "public/ical/*";
foreach(glob($dir) as $file)
{
$entity_id = preg_match("/\d/", $file);
$entity = Entity::where('id', $entity_id)
->with('users')
->first();
dd($entity->users->id); //I want to retrieve that.
$icals = new ICal($file, array(
'defaultSpan' => 2,
'defaultTimeZone' => 'UTC',
'defaultWeekStart' => 'MO',
'skipRecurrence' => false,
'useTimeZoneWithRRules' => false,
));
$time_period = array(
'interval' => true,
);
if ($time_period['interval']) {
$events = $icals->eventsFromInterval('2 week');
$count = 1;
}
foreach ($events as $event) {
$dtstart = $icals->iCalDateToDateTime($event->dtstart);
$dtend = $icals->iCalDateToDateTime($event->dtend);
$dtstart_tz = $icals->iCalDateToDateTime($event->dtstart_tz);
$dtend_tz = $icals->iCalDateToDateTime($event->dtend_tz);
$database_event = new Event;
$database_event->type = "External Event";
$database_event->startdate = $dtstart->format('d-m-Y');
$database_event->endate = $dtend->format('d-m-Y');
$database_event->startime = $dtstart_tz->format('H:i');
$database_event->endtime = $dtend_tz->format('H:i');
$database_event->title = $event->summary;
$database_event->description = $event->description ;
$database_event->location = $event->location;
$database_event->entity_id = $entity_id;
$database_event->save();
$this->info("Event Retrieved");
$count++;
}
data dump dd（$ entity）给出：
App\Entity {#620
#table: "entities"
+timestamps: true
#connection: "mysql"
#primaryKey: "id"
#keyType: "int"
+incrementing: true
#with: []
#withCount: []
#perPage: 15
+exists: true
+wasRecentlyCreated: false
#attributes: array:16 [
"id" => 1
"name" => "dasd"
"type" => "dsa"
"email" => "adas"
"logo" => null
"twitter_business" => null
"facebook_business" => null
"instagram_business" => null
"google_places" => null
"ical" => null
"slug" => null
"api_key" => null
"geoloc_id" => null
"deleted" => 0
"created_at" => null
"updated_at" => null
]
#original: array:16 [
"id" => 1
"name" => "dasd"
"type" => "dsa"
"email" => "adas"
"logo" => null
"twitter_business" => null
"facebook_business" => null
"instagram_business" => null
"google_places" => null
"ical" => null
"slug" => null
"api_key" => null
"geoloc_id" => null
"deleted" => 0
"created_at" => null
"updated_at" => null
]
#casts: []
#dates: []
#dateFormat: null
#appends: []
#events: []
#observables: []
#relations: array:1 [
"users" => Illuminate\Database\Eloquent\Collection {#622
#items: array:2 [
0 => App\Entity {#630
#table: "entities"
+timestamps: true
#connection: "mysql"
#primaryKey: "id"
#keyType: "int"
+incrementing: true
#with: []
#withCount: []
#perPage: 15
+exists: true
+wasRecentlyCreated: false
#attributes: array:16 [
"id" => 1
"name" => "dasd"
"type" => "dsa"
"email" => "adas"
"logo" => null
"twitter_business" => null
"facebook_business" => null
"instagram_business" => null
"google_places" => null
"ical" => null
"slug" => null
"api_key" => null
"geoloc_id" => null
"deleted" => 0
"created_at" => null
"updated_at" => null
]
#original: array:18 [
"id" => 1
"name" => "dasd"
"type" => "dsa"
"email" => "adas"
"logo" => null
"twitter_business" => null
"facebook_business" => null
"instagram_business" => null
"google_places" => null
"ical" => null
"slug" => null
"api_key" => null
"geoloc_id" => null
"deleted" => 0
"created_at" => null
"updated_at" => null
"pivot_user_id" => 1
"pivot_entity_id" => 1
]
#casts: []
#dates: []
#dateFormat: null
#appends: []
#events: []
#observables: []
#relations: array:1 [
"pivot" => Illuminate\Database\Eloquent\Relations\Pivot {#629
+parent: App\Entity {#597
#table: "entities"
+timestamps: true
#connection: null
#primaryKey: "id"
#keyType: "int"
+incrementing: true
#with: []
#withCount: []
#perPage: 15
+exists: false
+wasRecentlyCreated: false
#attributes: []
#original: []
#casts: []
#dates: []
#dateFormat: null
#appends: []
#events: []
#observables: []
#relations: []
#touches: []
#hidden: []
#visible: []
#fillable: []
#guarded: array:1 [
0 => "*"
]
}
#foreignKey: "user_id"
#relatedKey: "entity_id"
#guarded: []
#connection: null
#table: "entity_user"
#primaryKey: "id"
#keyType: "int"
+incrementing: true
#with: []
#withCount: []
#perPage: 15
+exists: true
+wasRecentlyCreated: false
#attributes: array:2 [
"user_id" => 1
"entity_id" => 1
]
#original: array:2 [
"user_id" => 1
"entity_id" => 1
]
#casts: []
#dates: []
#dateFormat: null
#appends: []
#events: []
#observables: []
#relations: []
#touches: []
+timestamps: false
#hidden: []
#visible: []
#fillable: []
}
]
#touches: []
#hidden: []
#visible: []
#fillable: []
#guarded: array:1 [
0 => "*"
]
}
1 => App\Entity {#633
#table: "entities"
+timestamps: true
#connection: "mysql"
#primaryKey: "id"
#keyType: "int"
+incrementing: true
#with: []
#withCount: []
#perPage: 15
+exists: true
+wasRecentlyCreated: false
#attributes: array:16 [
"id" => 2
"name" => "ddasd"
"type" => "fsdf"
"email" => "fsdf"
"logo" => null
"twitter_business" => null
"facebook_business" => null
"instagram_business" => null
"google_places" => null
"ical" => null
"slug" => null
"api_key" => null
"geoloc_id" => null
"deleted" => 0
"created_at" => null
"updated_at" => null
]
#original: array:18 [
"id" => 2
"name" => "ddasd"
"type" => "fsdf"
"email" => "fsdf"
"logo" => null
"twitter_business" => null
"facebook_business" => null
"instagram_business" => null
"google_places" => null
"ical" => null
"slug" => null
"api_key" => null
"geoloc_id" => null
"deleted" => 0
"created_at" => null
"updated_at" => null
"pivot_user_id" => 1
"pivot_entity_id" => 2
]
#casts: []
#dates: []
#dateFormat: null
#appends: []
#events: []
#observables: []
#relations: array:1 [
"pivot" => Illuminate\Database\Eloquent\Relations\Pivot {#625
+parent: App\Entity {#597}
#foreignKey: "user_id"
#relatedKey: "entity_id"
#guarded: []
#connection: null
#table: "entity_user"
#primaryKey: "id"
#keyType: "int"
+incrementing: true
#with: []
#withCount: []
#perPage: 15
+exists: true
+wasRecentlyCreated: false
#attributes: array:2 [
"user_id" => 1
"entity_id" => 2
]
#original: array:2 [
"user_id" => 1
"entity_id" => 2
]
#casts: []
#dates: []
#dateFormat: null
#appends: []
#events: []
#observables: []
#relations: []
#touches: []
+timestamps: false
#hidden: []
#visible: []
#fillable: []
}
]
#touches: []
#hidden: []
#visible: []
#fillable: []
#guarded: array:1 [
0 => "*"
]
}
]
}
]
#touches: []
#hidden: []
#visible: []
#fillable: []
#guarded: array:1 [
0 => "*"
]
}
答案 0 :(得分：0)
实体对象和用户对象之间的关系是多对多的。你做不到
$entity->users->id
这是因为您正在尝试用户集合上的id属性。
试试这个：
$entity->users->first()->id
要遍历您的用户，请执行以下操作：
foreach ($entity->users as $user)
{
echo($user->id);
}