Question

我正在制作电影WebApp。用户选择电影并将其添加到数据库中。列movie_list是JSON，因为

我希望每次用户添加电影时，它都会被添加到数组中，如果已经存在，我希望它不会被添加到数组中。

问题在于，不是将其添加到现有数组中，而是有时会覆盖该数组，仅添加嵌套的数组或仅创建自定义键(0,1,2,3)。

我试图发挥作用

  array_merge and array_add

  // It does overwrite it
  array['checkedMovie'] = 3

每个人都在考虑，但可悲的是不知道如何实现。

我的大脑被挤压了。

public function update(Request $request, TrackMovie $trackMovie)
    {

      $currentCheckedMoviesArray = DB::table('track_movies')->where('user_id', $trackMovie->user_id)->get('checkedMovie');


      $currentCheckedMoviesArray = json_decode($currentCheckedMoviesArray, true)[0];

      $newarraychecked=array_add($currentCheckedMoviesArray,$currentCheckedMoviesArray['checkedMovie'], $trackMovie->checkedMovie);



      return dd($newarraychecked);

      $current_length = DB::table('track_movies')->where('user_id', $trackMovie>user_id)->value('lengthOfMovie');
      DB::table('track_movies')->where('user_id', $trackMovie->user_id)->update([
        'lengthOfMovie' => $current_length + $trackMovie->lengthOfMovie,
'checkedMovie' => $newarraychecked;
      ]);
        return dd(TrackMovie::all());
    }

为了使它清晰一点，我对其进行了编辑，因为我认为是因为我的格式。

$currentCheckedMoviesArray = json_decode($currentCheckedMoviesArray, true)[0];
// DD Result
array:1 [▼
  "checkedMovie" => "["1", "2"]"
]

$trackMovie->checkedMovie
//DD Result
array:2 [▼
  0 => "2"
  1 => "4"
]

$newarraychecked=Arr::collapse($currentCheckedMoviesArray, $trackMovie->checkedMovie);
//DD Result
    []

实际结果：

This is the result what I get on the above code
array:1 [▼
  "checkedMovie" => "["1", "2"]"
]

There some more because I tested many things

array:1 [▼
  "checkedMovie" => "["1", "2"]"
   1             => "2"
   2             => "4"

]

预期结果：

The User is checking some movies.
// He already has some movies
checkedMovie = ["1","2","3"]

Now the Application Checks if it already existed the movie in the Database. 
If it does not contain in the database I want to add it. User selects Movie ID (5,6)
checkedMovie = ["1","2","3","5","6"]

After that, it will overwrite the Database column value

如果我忘记了要添加到问题中的内容，请对其进行评论，以便我可以编辑问题！

Answer 1

您可以将新值推送到数组，然后使用array_unique过滤出重复项

示例：

public function update(Request $request, TrackMovie $trackMovie)
    {
      //Get Current Array from DB
      $currentCheckedMoviesArray = DB::table('track_movies')->where('user_id', $trackMovie->user_id)->get('checkedMovie');
      $currentCheckedMoviesArray = json_decode($currentCheckedMoviesArray, true)[0];

      //Decode JSON array
      $currentCheckedMoviesArray['checkedMovie'] = json_decode($currentCheckedMoviesArray['checkedMovie'])

      //Push the new Movie to the array
      $currentCheckedMoviesArray['checkedMovie'][] = $trackMovie->checkedMovie;

      //Remove duplicates from the array
      $newarraychecked = array_unique($currentCheckedMoviesArray['checkedMovie']);

      ....
    }

Answer 2

尝试以下操作：

$checkedMovie=array(1,2,3);  
$selectedMovie=array(3,4,5,6);
$checkedMovie=array_unique(array_merge($checkedMovie,$selectedMovie));

如何从特定于数据库的选定值中添加到解码的Json数组

2 个答案: