Question

Hi Stack Overflow社区！

我有以下测试数组：

let test = [{
    "searchQuery": "test",
    "resultsLoaded": -1,
    "offset": -1,
    "allResults": 10
}, {
    "metaData": {
        "type": "page-content",
        "image": true,
        "name": "lorem-ipsum",
        "rank": 10,
        "tags": ["website:lorem/ipsum"]
    },
    "componentData": {
        "header": "Lorem Ipsum",
        "path": "/content/asdf",
        "breadcrumbDouble": {
            "breadcrumbItem1": {
                "href": "lorem ipsum",
                "text": "lorem ipsum"
            },
            "breadcrumbItem2": {
                "href": "/content/asdf",
                "text": "Lorem Ipsum"
            }
        },
        "content": {
            "subheadline": "Lorem Ipsum",
            "img": {
                "alt": "",
                "imgSrc": "/content/dam/production/images/asdf.jpeg.imgTransformer/listPageItem/desktop/1511962617778/asdf.jpg"
            },
            "tags": [{
                "category": "lorem",
                "value": "ipsum"
            }]
        }
    }
}, {
    "metaData": {
        "type": "page-content",
        "image": true,
        "name": "lorem-ipsum",
        "rank": 50,
        "tags": ["website:lorem/ipsum"]
    },
    "componentData": {
        "header": "Lorem Ipsum",
        "path": "/content/asdf",
        "breadcrumbDouble": {
            "breadcrumbItem1": {
                "href": "lorem ipsum",
                "text": "lorem ipsum"
            },
            "breadcrumbItem2": {
                "href": "/content/asdf",
                "text": "Lorem Ipsum"
            }
        },
        "content": {
            "subheadline": "Lorem Ipsum",
            "img": {
                "alt": "",
                "imgSrc": "/content/dam/production/images/asdf.jpeg.imgTransformer/listPageItem/desktop/1511962617778/asdf.jpg"
            },
            "tags": [{
                "category": "lorem",
                "value": "ipsum"
            }]
        }
    }
}, {
    "metaData": {
        "type": "page-content",
        "image": true,
        "name": "lorem-ipsum",
        "rank": 30,
        "tags": ["website:lorem/ipsum"]
    },
    "componentData": {
        "header": "Lorem Ipsum",
        "path": "/content/asdf",
        "breadcrumbDouble": {
            "breadcrumbItem1": {
                "href": "lorem ipsum",
                "text": "lorem ipsum"
            },
            "breadcrumbItem2": {
                "href": "/content/asdf",
                "text": "Lorem Ipsum"
            }
        },
        "content": {
            "subheadline": "Lorem Ipsum",
            "img": {
                "alt": "",
                "imgSrc": "/content/dam/production/images/asdf.jpeg.imgTransformer/listPageItem/desktop/1511962617778/asdf.jpg"
            },
            "tags": [{
                "category": "lorem",
                "value": "ipsum"
            }]
        }
    }
}];

我现在想要实现的是按 metaData.rank 从最高到最低排序对象。

我想像这样使用lodash的orderBy()：

let result = orderBy(test, function(e) {
    let array = parseInt(e.metaData.rank);
    return array;
}, ['desc']);

但是我收到以下错误：

TypeError：无法读取未定义的属性'rank'

我的console.log(e)函数中的

orderBy向我显示了这个：

{
    searchQuery: 'test',
    resultsLoaded: -1,
    offset: -1,
    allResults: 10
}

有任何快速建议来解决这个问题吗？

我知道第一个对象是因为结构不同而引起问题。所以我需要解决它！

Answer 1

代替e.metaData.rank使用：

_.get(e, ['metaData', 'rank'], /*value if rank field is not exist*/ -1);

使用lodash按键对数组中的对象进行排序

1 个答案: