laravel 附加缺少 id SQL NOT NULL CONSTRAINT

Question

我尝试在 Laravel 中以多对多关系附加 2 个对象。所以我有用户和团队。当我尝试时，$user->teams()->attach($team->id, ['instrument_user_id' => $randomInstrument, 'is_leader' => $is_leader]);我得到了下一个错误：SQLSTATE[23000]: Integrity constraint violation: 19 NOT NULL constraint failed: team_members.user_id (SQL: insert into "team_members" ("team_id", "instrument_user_id", "is_leader") values (73, 1, 0))当我尝试时，$team->members()->attach($user->id, ['instrument_user_id' => $randomInstrument, 'is_leader' => $is_leader]);我得到了下一个错误：SQLSTATE[23000]: Integrity constraint violation: 19 NOT NULL constraint failed: team_members.team_id (SQL: insert into "team_members" ("user_id", "instrument_user_id", "is_leader") values (1, 1, 0))那么我必须在哪里添加我要附加的项目的 id，或者我做错了什么？用户型号：public function teams(){        return $this->belongsToMany('App\Team', 'team_members', 'team_id')                    ->as('details')                    ->withPivot('instrument_user_id', 'is_leader')                    ->using('App\TeamMember');    }团队模型：public function members()    {        return $this->belongsToMany('\App\User', 'team_members', 'user_id')                    ->as('details')                    ->withPivot('instrument_user_id','is_leader')                    ->using('App\TeamMember');    }

Answer 1

尝试这种关系：

团队模型：

public function teams(){

        return $this->belongsToMany('App\Team', 'team_members', 'team_id', 'user_id')

                    ->as('details')

                    ->withPivot('instrument_user_id', 'is_leader')

                    ->using('App\TeamMember');

    }

团队模型：

public function members()

    {

        return $this->belongsToMany('\App\User', 'team_members', 'user_id', 'team_id')

                    ->as('details')

                    ->withPivot('instrument_user_id','is_leader')

                    ->using('App\TeamMember');

    }