Question

我有一系列文章，这些文章通过多对多系统链接到某些标签。当我想获取所有文章时，返回的JSON如下所示：

[
    {
        "id": 1,
        "title": "Subin",
        "content": "Integer ac leo...",
        "illustration": "http://dummyimage.com/1920x1080.png/ff4444/ffffff",
        "lang": "fr",
        "tags": [
            {
                "name": "project",
                "description": "Praesent id massa...",                   
                "slug": "854963934-6",
                "id": 4,
            },
            {
                "name": "Grass-roots",
                "description": "Proin eu mi...",
                "slug": "528521892-6",
                "id": 2,
            }
        ]
    },
    {
        "id": 2,
        "title": "Voyatouch",
        "content": "Curabitur gravida nisi at nibh...",
        "illustration": "http://dummyimage.com/1920x1080.png/cc0000/ffffff",
        "lang": "fr",
        "tags": [
            {
                "name": "Grass-roots",
                "description": "Proin eu mi...",
                "slug": "528521892-6",
                "id": 2,
            },
            {
                "name": "User-friendly",
                "description": "Vestibulum quam sapien...",
                "slug": "237872269-9",
                "id": 1,
            }
        ]
    },
]

我想按文章的标签过滤文章。如果我单击标签，则所有带有该标签的文章都会一直显示，而其他文章消失。

通常，如果标签只是一个字符串数组，我将执行以下操作：

filter (tag) {
  // This is a VueJS context
  return this.articles.filter(article => article.tag === tag)
}

但是，由于它是一个对象数组，因此我尝试执行以下操作：

filter (tag) {
  let self = this
  return this.articles.filter(article => {
    return article.tags.filter(tag => tag.name === self.selected)
  })
}

但是它什么也不返回。

正确的方法是什么？

提前谢谢

Answer 1

您可以使用filter()来过滤数组。使用some()检查文章是否具有特定标签。

var arr = [{"id":1,"title":"Subin","content":"Integer ac leo...","illustration":"http://dummyimage.com/1920x1080.png/ff4444/ffffff","lang":"fr","tags":[{"name":"project","description":"Praesent id massa...","slug":"854963934-6","id":4},{"name":"Grass-roots","description":"Proin eu mi...","slug":"528521892-6","id":2}]},{"id":2,"title":"Voyatouch","content":"Curabitur gravida nisi at nibh...","illustration":"http://dummyimage.com/1920x1080.png/cc0000/ffffff","lang":"fr","tags":[{"name":"Grass-roots","description":"Proin eu mi...","slug":"528521892-6","id":2},{"name":"User-friendly","description":"Vestibulum quam sapien...","slug":"237872269-9","id":1}]}]

var tagName = "project"; //Tag name to search
var result = arr.filter(o => o.tags.some(x => x.name === tagName));;

console.log(result);

文档：.filter()，.some()

如何过滤包含对象本身数组的对象数组？

1 个答案: