由于某种原因，当我通过 props 传递数组时，我不明白为什么 v-for 不起作用，而我可以从直接写入数据中看到的唯一区别是，从 props 传递的数据之间没有空格。

我正在使用 laravel 并通过 blade 将数据传递给 vue，数据是包含信息的所有照片的数组。但是这些数据不会列出所有的照片并显示 div。

让我给你展示一下我的代码：

这是我在 blade 模板中的内容：

<picture-upload
    :input_value="'{{ json_encode($profilephotos) }}'"
    :bind_user="'{{ $profile->id }}'"
    :input_name="'profilephoto'"
    :post_url="'{{ route('photouploads') }}'"
    :type="'profilephoto'"
></picture-upload>

我认为 json_encode 在这种情况下没有什么不同，但我还是尝试了一下。

这是我在 photos.vue 文件中的内容

props: ['input_name', 'post_url', 'bind_user', 'type', 'input_value'],
    data() {
        return {
            files: [],
            uploads: this.input_value,
            items: [
              {"id":110,"user_id":28,"type":"profilephoto","name":"5.jpg","mime":"image/jpeg","extension":"jpg","path":"3f49191095d302fb7e66ce037dd5efa111287e8230964ad8a3170687ca4336a1","size":192445,"created_at":"2019-04-23 16:04:01","updated_at":"2019-04-23 16:04:01"},
              {"id":111,"user_id":28,"type":"profilephoto","name":"4.jpg","mime":"image/jpeg","extension":"jpg","path":"0bd693c2cd1ab5ec2c7223fc6a92356ab68c52e8cc0b7d5d5aa5b4a230cf015b","size":193223,"created_at":"2019-04-23 21:58:52","updated_at":"2019-04-23 21:58:52"},
              {"id":112,"user_id":28,"type":"profilephoto","name":"5.jpg","mime":"image/jpeg","extension":"jpg","path":"0bd693c2cd1ab5ec2c7223fc6a92356ab68c52e8cc0b7d5d5aa5b4a230cf015b","size":192445,"created_at":"2019-04-23 21:58:52","updated_at":"2019-04-23 21:58:52"},
              {"id":113,"user_id":28,"type":"profilephoto","name":"4.jpg","mime":"image/jpeg","extension":"jpg","path":"ffe6f95d10c5249390fcea140fe15a1fb57f5d29626a947e4a999db50f3ea295","size":193223,"created_at":"2019-04-23 22:00:10","updated_at":"2019-04-23 22:00:10"},
              {"id":114,"user_id":28,"type":"profilephoto","name":"4.jpg","mime":"image/jpeg","extension":"jpg","path":"75a00a901f1a01a0267d44bebc8574efa9eb7a7edfd395e29dabb289efb353ac","size":193223,"created_at":"2019-04-23 22:05:32","updated_at":"2019-04-23 22:05:32"}
            ]
        }
    },

所以 input_value 是从 blade 模板传递的内容， items 是我为测试手动添加的内容， items 与我在前端输出数据时看到的完全相同。

这是我在 . vue <template> 部分中的内容

{{ items }}

<li v-for="item in items">
   {{ item.type }}
</li>

{{ uploads }}

<div v-for="upload in uploads">
  {{ upload.type }}
</div>

所以 items 应输出完整数组，而 v-for 应过滤并输出该数组中的每个项目，这对于 uploads 应该相同，但问题是 uploads 不起作用。

这是我在前面实际得到的内容

对于 {{ items }>

[ { "id": 110, "user_id": 28, "type": "profilephoto", "name": "5.jpg", "mime": "image/jpeg", "extension": "jpg", "path": "3f49191095d302fb7e66ce037dd5efa111287e8230964ad8a3170687ca4336a1", "size": 192445, "created_at": "2019-04-23 16:04:01", "updated_at": "2019-04-23 16:04:01" }, { "id": 111, "user_id": 28, "type": "profilephoto", "name": "4.jpg", "mime": "image/jpeg", "extension": "jpg", "path": "0bd693c2cd1ab5ec2c7223fc6a92356ab68c52e8cc0b7d5d5aa5b4a230cf015b", "size": 193223, "created_at": "2019-04-23 21:58:52", "updated_at": "2019-04-23 21:58:52" }, { "id": 112, "user_id": 28, "type": "profilephoto", "name": "5.jpg", "mime": "image/jpeg", "extension": "jpg", "path": "0bd693c2cd1ab5ec2c7223fc6a92356ab68c52e8cc0b7d5d5aa5b4a230cf015b", "size": 192445, "created_at": "2019-04-23 21:58:52", "updated_at": "2019-04-23 21:58:52" }, { "id": 113, "user_id": 28, "type": "profilephoto", "name": "4.jpg", "mime": "image/jpeg", "extension": "jpg", "path": "ffe6f95d10c5249390fcea140fe15a1fb57f5d29626a947e4a999db50f3ea295", "size": 193223, "created_at": "2019-04-23 22:00:10", "updated_at": "2019-04-23 22:00:10" }, { "id": 114, "user_id": 28, "type": "profilephoto", "name": "4.jpg", "mime": "image/jpeg", "extension": "jpg", "path": "75a00a901f1a01a0267d44bebc8574efa9eb7a7edfd395e29dabb289efb353ac", "size": 193223, "created_at": "2019-04-23 22:05:32", "updated_at": "2019-04-23 22:05:32" } ]

并且 v-for="item in items" 逻辑有效，如果我这样做

<li v-for="item in items">
   {{ item.type }}
</li>

我将获得 item.type 列表

问题发生在如果我对 uploads 执行完全相同的操作时，某些功能不起作用。

如果我测试 {{ uploads }> 的输出，我将获得与 items 完全相同的数组，只是数组中的内容之间有空格。

这是 {{ uploads }>

[{"id":110,"user_id":28,"type":"profilephoto","name":"5.jpg","mime":"image/jpeg","extension":"jpg","path":"3f49191095d302fb7e66ce037dd5efa111287e8230964ad8a3170687ca4336a1","size":192445,"created_at":"2019-04-23 16:04:01","updated_at":"2019-04-23 16:04:01"},{"id":111,"user_id":28,"type":"profilephoto","name":"4.jpg","mime":"image/jpeg","extension":"jpg","path":"0bd693c2cd1ab5ec2c7223fc6a92356ab68c52e8cc0b7d5d5aa5b4a230cf015b","size":193223,"created_at":"2019-04-23 21:58:52","updated_at":"2019-04-23 21:58:52"},{"id":112,"user_id":28,"type":"profilephoto","name":"5.jpg","mime":"image/jpeg","extension":"jpg","path":"0bd693c2cd1ab5ec2c7223fc6a92356ab68c52e8cc0b7d5d5aa5b4a230cf015b","size":192445,"created_at":"2019-04-23 21:58:52","updated_at":"2019-04-23 21:58:52"},{"id":113,"user_id":28,"type":"profilephoto","name":"4.jpg","mime":"image/jpeg","extension":"jpg","path":"ffe6f95d10c5249390fcea140fe15a1fb57f5d29626a947e4a999db50f3ea295","size":193223,"created_at":"2019-04-23 22:00:10","updated_at":"2019-04-23 22:00:10"},{"id":114,"user_id":28,"type":"profilephoto","name":"4.jpg","mime":"image/jpeg","extension":"jpg","path":"75a00a901f1a01a0267d44bebc8574efa9eb7a7edfd395e29dabb289efb353ac","size":193223,"created_at":"2019-04-23 22:05:32","updated_at":"2019-04-23 22:05:32"},{"id":115,"user_id":28,"type":"profilephoto","name":"4.jpg","mime":"image/jpeg","extension":"jpg","path":"c0db13b85c255a30b8466ca5778cad05d06f20f2cf12a3db46e9b6a7d182fdd8","size":193223,"created_at":"2019-04-23 22:14:37","updated_at":"2019-04-23 22:14:37"},{"id":116,"user_id":28,"type":"profilephoto","name":"4.jpg","mime":"image/jpeg","extension":"jpg","path":"3591cedc64c8f3638d71643291ce2e37d697dbcdfe08c715254d94237b93b1a1","size":193223,"created_at":"2019-04-23 22:21:37","updated_at":"2019-04-23 22:21:37"}]

如果我尝试执行

<div v-for="upload in uploads">
  {{ upload.type }}
</div>

如果没有 upload.type 输出，我会得到一大堆空的 div。另外，我总共有 20 张图片，我得到了 200 个空的 div。

这让我很困惑，为什么会发生这种情况，有什么建议吗？