尝试将循环存储到数组时出现错误

Question

每次尝试保存数据时都会遇到此错误。

但是当我使用dd（）时，数组工作正常

详细信息

型号：**父母[条款和等级] **结：： （型号：term_level，表格：term_levels）

TermModel：

 public function level(){
    return $this->belongsToMany(Level::class, 'term_levels','Term_id', 'Level_id');
  } 

LevelModel：

public function term(){
    return $this->belongsToMany(Term::class, 'term_levels', 'Level_id', 'Term_id');
  } 

控制器：

 public function store_term_level(Request $request)

{
    $data=$request->all();

    foreach($data['Term_id'] as $termId){
        $term = Term::find($termId);
        $levelids = $data['Level_id'];
        $term->level()->attach($levelids);
        $term_level=new term_level;
        $term_level->Term_id=$request->input('Term_id');
        $term_level->Level_id=$request->input('Level_id');

        $term_level->save();

}

Answer 1

尝试此代码

public function store_term_level(Request $request)
{
    $data = $request->all();

    foreach ($data['Term_id'] as $termId) {
        foreach ($data['Level_id'] as $levelId) {
            $term_level = new term_level;
            $term_level->Term_id = $termId;
            $term_level->Level_id = $levelId;
            $term_level->save();
        }
    }
}

或

$terms = Term::whereIn('id', $data['Term_id'])->get();
foreach ($terms as $term) {
    $levelids = $data['Level_id'];
    $term->level()->attach($levelids);
}

Answer 2

$terms = Term::whereIn('id', $data['Term_id'])->get();
foreach ($terms as $term) {
    $levelids = $data['Level_id'];
    $term->level()->attach($levelids);
}

这是一个更好的解决方案，因为它对数据库的请求较小

Answer 3

这是正确的答案，我将其转换为jason_array

 $data=$request->all();
    foreach($data['Term_id'] as $term){
        $term = Term::find($term);
        $level = $data['Level_id'];
        $term->level()->attach($level);
        $term_level=new term_level;
        $term_level->Term_id=$request->input('Term_id');
        $term_level->Level_id=$request->input('Level_id');
       //this code solve the problem..
        $term_level = json_encode($data, true);

}