Question

试图从每个人那里获取身份

$person = $request->input('person'); 
//values for person: Murdock,Wayne
$values = explode(',' , $person);

if(count($values) > 1) {
    //count($values) = 2
    foreach($values as $val) {
        $get_id = Tag::where('name', $val)->get();

        foreach($get_id as $get) {
            echo "id=".$get->id;
            $result= FileTags::with('file')->where('tag_id', $get->id)->get(); 
        }
    }
 }

当我{id}获得id = 1时，被认为是id = 1且id = 2

默多克 - 身份：1

Wayne - id：2

echo $get->id

我应该获取id为2,3和4的文件

模型标签

|table filetags|
|  id  | tag_id | file_id |
|  1   |   1    |    2    |
|  2   |   1    |    3    |
|  3   |   2    |    4    |
|  4   |   3    |    1    |

$result = FileTags::with('file')->where('tag_id', $id->id)->get();

模型存档

public function fileTag() {
    return $this->hasMany('App\FileTags');
}

模型文件标签

protected $table = 'files';

public function fileTag() {
    return $this->hasMany('App\FileTags');
}

感谢您的帮助。

修改

public function tag() {
    return $this->belongsTo('App\Tag' , 'tag_id');
}

public function file() {
    return $this->belongsTo('App\Archive', 'file_id');
}

echo $ obt_id;

的结果

 |table tag|
    | id  |   name    |
    |  1  |  Murdock  |
    |  2  |  Wayne    |

来自var_dump（$ obt_id）

 [{"id":1,"name":"Murdock","description":"Description","type":"0","status":"1","created_at":"2016-07-20 18:01:14","updated_at":"2016-07-20 18:01:14"}][]

Answer 1

您可以创建变量$result;将其初始化为空Array，然后将所有评估代码的结果FileTags::with('file')->where('tag_id', $get->id)->get()推送到$result数组中。最后，检查$result数组是否为空。如果不是，你可以简单地用逗号破坏它（假设它是一个字符串）并回显你的结果......

<?php

    $person = $request->input('person');
    //values for person: Murdock,Wayne
    $values = explode(',' , $person);
    $result = array();    // <== INITIALIZE TO AN EMPTY ARRAY... 

    if(count($values) > 1) {        //<== $values NOT values...
        //count(values) = 2
        foreach($values as trim($val)) { //<== TRY TRIMMING OFF WHITE SPACES. 
            $get_id = Tag::where('name', $val)->get();
            foreach($get_id as $get) {
                echo "id=".$get->id;
                // PUSH THE DATA INTO THE ARRAY...
                $result[] = FileTags::with('file')->where('tag_id', $get->id)->get();
            }
        }
    }

    // CHECK IF $result IS NOT EMPTY 
    if(!empty($result)){
        // CONVERT THE ARRAY TO A STRING (ASSUMING ITS CONTENT ARE NOT OBJECTS OR ARRAYS)
        $result = implode(", ", $result);

        // ECHO OUR YOUR RESULT...
        echo $result;
    }

从foreach获取值时遇到问题

1 个答案: