问题
我想利用雄辩而不是依赖联接
查询
$relationship = DB::table('tournament_user')
->join('tournaments','tournament_user.tournament_id' , '=', 'tournaments.id')
->join('users', 'tournament_user.user_id', '=', 'users.id')
->select('tournament_user.user_id','tournament_user.tournament_id')
->where('tournament_user.user_id','=',$request->user()->id)
->get();
此查询返回已登录用户的所有锦标赛ID列表。
如何避免加入？
我试过了：$relations = User::with('tournaments')->where('id',$request->user()->id)->get();
只返回一行。而有3场比赛属于id = 2的用户。
我想简单地将上面的Joins查询转换为使用eloquent模型。
用户模型
public function tournaments()
{
return $this->belongsToMany('App\Tournament', 'tournament_user','tournament_id','user_id');
}
锦标赛模特
public function users()
{
return $this->belongsToMany('App\User','tournament_user','tournament_id','user_id');
}
的var_dump
object(Illuminate\Database\Eloquent\Collection)#350 (1){
[
"items":protected
] => array(1) {
[
0
] => object(App\User)#345 (23) {
[
"table":protected
] => string(5) "users" [
"fillable":protected
] => array(5) {
[
0
] => string(4) "name" [
1
] => string(5) "email" [
2
] => string(3) "dob" [
3
] => string(6) "gender" [
4
] => string(8) "password"
} [
"hidden":protected
] => array(2) {
[
0
] => string(8) "password" [
1
] => string(14) "remember_token"
} [
"connection":protected
] => NULL [
"primaryKey":protected
] => string(2) "id" [
"perPage":protected
] => int(15) [
"incrementing"
] => bool(true) [
"timestamps"
] => bool(true) [
"attributes":protected
] => array(12) {
[
"id"
] => int(2) [
"name"
] => string(4) "john" [
"email"
] => string(14) "john@gmail.com" [
"role"
] => string(4) "user" [
"gender"
] => string(4) "male" [
"status"
] => string(6) "active" [
"dob"
] => string(10) "2001-01-01" [
"password"
] => string(60) "$2y$10$QCtSuNroLftEm.xFLiAbheCt32dSp24rXfn9aJX8pvfbVNVMKyZ.6" [
"remember_token"
] => string(60) "3CPQZ1GSFjTV4qBkCoxt30fOSMrKHsPCkgeMb3uJwKz2nyKUqsDABizIVssH" [
"created_at"
] => string(19) "2016-03-16 10:49:29 " [" updated_at"
] => string(19) "2016-07-23 10:49:35 " [" image"
] => string(13) "/img/user.png"
} [
"original":protected
] => array(12) {
[
"id"
] => int(2) [
"name"
] => string(4) "john" [
"email"
] => string(14) "john@gmail.com" [
"role"
] => string(4) "user" [
"gender"
] => string(4) "male" [
"status"
] => string(6) "active" [
"dob"
] => string(10) "2001-01-01" [
"password"
] => string(60) "$2y$10$QCtSuNroLftEm.xFLiAbheCt32dSp24rXfn9aJX8pvfbVNVMKyZ.6" [
"remember_token"
] => string(60) "3CPQZ1GSFjTV4qBkCoxt30fOSMrKHsPCkgeMb3uJwKz2nyKUqsDABizIVssH" [
"created_at"
] => string(19) "2016-03-16 10:49:29 " [" updated_at"
] => string(19) "2016-07-23 10:49:35 " [" image"
]=> string(13) "/img/user.png"
}[
"relations":protected
]=> array(1){
[
"tournaments"
]=> object(Illuminate\Database\Eloquent\Collection)#353 (1){
[
"items":protected
] => array(1) {
[
0
] => object(App\Tournament)#352 (23) {
[
"table":protected
] => string(11) "tournaments" [
"fillable":protected
] => array(7) {
[
0
] => string(6) "t_name" [
1
] => string(6) "t_desc" [
2
] => string(6) "t_club" [
3
] => string(10) "t_location" [
4
] => string(6) "t_date" [
5
] => string(11) "t_starttime" [
6
] => string(9) "t_endtime"
} [
"connection":protected
] => NULL [
"primaryKey":protected
] => string(2) "id" [
"perPage":protected
] => int(15) [
"incrementing"
] => bool(true) [
"timestamps"
] => bool(true) [
"attributes":protected
] => array(12) {
[
"id"
] => int(2) [
"t_name"
] => string(22) "Flag Stroke Play Event" [
"t_desc"
] => string(499) "It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters,
as opposed to using 'Content here. Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s,
when an unknown printer took a galley of type and scrambled it to make a type specimen book." [
"t_club"
] => string(21) "Hermitage golf course" [
"t_location"
] => string(7) "Sharjah" [
"t_date"
] => string(10) "2016-07-20" [
"t_starttime"
] => string(8) "10:00:00 " [" t_endtime"
] => string(8) "01:00:00 " [" lat"
] => float(25.2) [
"lng"
] => float(55.27) [
"created_at"
] => string(19) "2016-02-22 16:00:00 " [" updated_at"
] => string(19) "2016-06-07 12:36:06 " } [" original":protected
]=> array(14){
[
"id"
] => int(2) [
"t_name"
] => string(22) "Flag Stroke Play Event" [
"t_desc"
] => string(499) "It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters,
as opposed to using 'Content here. Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s,
when an unknown printer took a galley of type and scrambled it to make a type specimen book." [
"t_club"
] => string(21) "Hermitage golf course" [
"t_location"
] => string(7) "Sharjah" [
"t_date"
] => string(10) "2016-07-20" [
"t_starttime"
] => string(8) "10:00:00 " [" t_endtime"
]=> string(8) "01:00:00" ["lat"
]=> float(25.2)[
"lng"
]=> float(55.27)[
"created_at"
]=> string(19) "2016-02-22 16:00:00" ["updated_at"
]=> string(19) "2016-06-07 12:36:06" ["pivot_tournament_id"
]=> int(2)[
"pivot_user_id"
]=> int(2)
}[
"relations":protected
]=> array(1){
[
"pivot"
]=> object(Illuminate\Database\Eloquent\Relations\Pivot)#351 (26){
[
"parent":protected
]=> object(App\User)#331 (23){
[
"table":protected
]=> string(5) "users"[
"fillable":protected
]=> array(5){
[
0
]=> string(4) "name"[
1
]=> string(5) "email"[
2
]=> string(3) "dob"[
3
]=> string(6) "gender"[
4
]=> string(8) "password"
}[
"hidden":protected
]=> array(2){
[
0
]=> string(8) "password"[
1
]=> string(14) "remember_token"
}[
"connection":protected
]=> NULL[
"primaryKey":protected
]=> string(2) "id"[
"perPage":protected
]=> int(15)[
"incrementing"
]=> bool(true)[
"timestamps"
]=> bool(true)[
"attributes":protected
]=> array(0){
}[
"original":protected
]=> array(0){
}[
"relations":protected
]=> array(0){
}[
"visible":protected
]=> array(0){
}[
"appends":protected
]=> array(0){
}[
"guarded":protected
]=> array(1){
[
0
]=> string(1) "*"
}[
"dates":protected
]=> array(0){
}[
"dateFormat":protected
]=> NULL[
"casts":protected
]=> array(0){
}[
"touches":protected
]=> array(0){
}[
"observables":protected
]=> array(0){
}[
"with":protected
]=> array(0){
}[
"morphClass":protected
]=> NULL[
"exists"
]=> bool(false)[
"wasRecentlyCreated"
]=> bool(false)
}[
"foreignKey":protected
]=> string(13) "tournament_id"[
"otherKey":protected
]=> string(7) "user_id"[
"guarded":protected
]=> array(0){
}[
"connection":protected
]=> NULL[
"table":protected
]=> string(15) "tournament_user"[
"primaryKey":protected
]=> string(2) "id"[
"perPage":protected
]=> int(15)[
"incrementing"
]=> bool(true)[
"timestamps"
]=> bool(false)[
"attributes":protected
]=> array(2){
[
"tournament_id"
]=> int(2)[
"user_id"
]=> int(2)
}[
"original":protected
]=> array(2){
[
"tournament_id"
]=> int(2)[
"user_id"
]=> int(2)
}[
"relations":protected
]=> array(0){
}[
"hidden":protected
]=> array(0){
}[
"visible":protected
]=> array(0){
}[
"appends":protected
]=> array(0){
}[
"fillable":protected
]=> array(0){
}[
"dates":protected
]=> array(0){
}[
"dateFormat":protected
]=> NULL[
"casts":protected
]=> array(0){
}[
"touches":protected
]=> array(0){
}[
"observables":protected
]=> array(0){
}[
"with":protected
]=> array(0){
}[
"morphClass":protected
]=> NULL[
"exists"
]=> bool(true)[
"wasRecentlyCreated"
]=> bool(false)
}
}[
"hidden":protected
]=> array(0){
}[
"visible":protected
]=> array(0){
}[
"appends":protected
]=> array(0){
}[
"guarded":protected
]=> array(1){
[
0
]=> string(1) "*"
}[
"dates":protected
]=> array(0){
}[
"dateFormat":protected
]=> NULL[
"casts":protected
]=> array(0){
}[
"touches":protected
]=> array(0){
}[
"observables":protected
]=> array(0){
}[
"with":protected
]=> array(0){
}[
"morphClass":protected
]=> NULL[
"exists"
]=> bool(true)[
"wasRecentlyCreated"
]=> bool(false)
}
}
}
}[
"visible":protected
]=> array(0){
}[
"appends":protected
]=> array(0){
}[
"guarded":protected
]=> array(1){
[
0
]=> string(1) "*"
}[
"dates":protected
]=> array(0){
}[
"dateFormat":protected
]=> NULL[
"casts":protected
]=> array(0){
}[
"touches":protected
]=> array(0){
}[
"observables":protected
]=> array(0){
}[
"with":protected
]=> array(0){
}[
"morphClass":protected
]=> NULL[
"exists"
]=> bool(true)[
"wasRecentlyCreated"
]=> bool(false)
}
}
}
答案 0 :(得分：1)
对于多对多关系看起来是正确的。
以下内容应该为您提供所有users，然后为每个用户使用竞赛关系中的预先加载来返回锦标赛。
$users = User::with('tournaments')->get();
foreach ($users as $user) {
foreach ($user->tournaments as $tournament) {
// Do what you want todo with the tournament
}
}
然后对于你的情况，它将返回一个用户及其锦标赛。
$user = User::with('tournaments')->where('id', $request->user()->id)->get();
foreach ($user->tournaments as $tournament) {
// Do what you want todo with the tournament
}
答案 1 :(得分：1)
我猜你在模特中的关系是错误的。
你的关系
public function tournaments()
{
return $this->belongsToMany('App\Tournament', 'tournament_user','tournament_id','user_id');
}
但是根据Laravel Documentation，
第三个参数是您所在模型的外键名称 正在定义关系，而第四个论点是 要加入的模型的外键名称：
这意味着您在用户模型中的关系应该像
public function tournaments()
{
return $this->belongsToMany('App\Tournament', 'tournament_user', 'user_id', 'tournament_id');
}