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$user->teams()->attach($team->id, ['instrument_user_id' => $randomInstrument, 'is_leader' => $is_leader]); 时，出现下一个错误：

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$team->members()->attach($user->id, ['instrument_user_id' => $randomInstrument, 'is_leader' => $is_leader]); 时，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？

用户模型：

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');
    }