我试图通过访问嵌套属性来过滤数组中的项&检查它的属性值是否包含某个字符串

Question

我正在尝试通过summary嵌套属性过滤objects的array，前提是它在summary属性值string中包含单词Save。这是array

const issues = [{
    id: '1',
    key: 'CLS-1',
    fields: {
      summary: 'Save princess',
      assignee: 'Mario',
    }
  },
  {
    id: '2',
    key: 'CLS-2',
    fields: {
      summary: 'Save Mario',
      assignee: 'Luigi',
    }
  },
  {
    id: '3',
    key: 'CLS-3',
    fields: {
      summary: 'Kidnap princess',
      assignee: 'Bowser',
    }
  },
  {
    id: '4',
    key: 'CLS-3',
    fields: {
      summary: 'Get kidnap!',
      assignee: 'Peach',
    }
  },
]

我已经尝试了这一行：

const getItemsBySummary = items.filter(item => item.fields.includes('Save'));

但是我得到了错误消息item.fields.includes is not a function. I'm guessing because fieldsis anobjectinstead of anarrayso it cannot run the methodincludes()`.然而，我试着这样做

const getItemsBySummary = items.filter(item => [item.fields].includes('Save'));

但是我得到了一个空数组。我做错了什么？

Answer 1

既然字段是一个对象，并且你想要根据属性摘要进行过滤，你应该使用下面的代码:/

const getItemsBySummary = items.filter(item => item.fields.summary.includes('Save'));

Answer 2

您需要item.fields.summary才能访问必填字段。

​

const items = [{
    id: '1',
    key: 'CLS-1',
    fields: {
      summary: 'Save princess',
      assignee: 'Mario',
    }
  },
  {
    id: '2',
    key: 'CLS-2',
    fields: {
      summary: 'Save Mario',
      assignee: 'Luigi',
    }
  },
  {
    id: '3',
    key: 'CLS-3',
    fields: {
      summary: 'Kidnap princess',
      assignee: 'Bowser',
    }
  },
  {
    id: '4',
    key: 'CLS-3',
    fields: {
      summary: 'Get kidnap!',
      assignee: 'Peach',
    }
  },
]
const res = items.filter(item => item.fields.summary.includes('Save'));
console.log(res);

​