Normalizr 转换模式的麻烦答案

【问题标题】：Normalizr convert schema troublesNormalizr 转换模式的麻烦
【发布时间】：2018-11-04 20:59:14
【问题描述】：

我如何转换一些 json 数组

[
   {
      "travelExpenseId":11,
      "tripId":2,
      "paymentPurpose":"some payment purpose 2",
      "receiptNumber":"EF12312_2",
      "receiptDate":"2018-09-30T00:00:00",
      "receiptPrice":107000.0,
      "receiptCurrency":"руб."
   },
   {
      "travelExpenseId":10,
      "tripId":2,
      "paymentPurpose":"some payment purpose 1",
      "receiptNumber":"EF12312_1",
      "receiptDate":"2018-09-30T00:00:00",
      "receiptPrice":107000.0,
      "receiptCurrency":"руб."
   }
]

到适合通过 travelExpenseId 快速获取费用和通过 tripId 获取费用的东西。

现在我使用这样的东西：

export const expenseSchema = new schema.Entity('expenses', {}, { idAttribute: 'travelExpenseId' });
export const expensesListSchema = [expenseSchema];

并得到结果：

data: {
  entities: {
    expenses: {
      '10': {
        travelExpenseId: 10,
        tripId: 2,
        paymentPurpose: 'some payment purpose 1',
        receiptNumber: 'EF12312_1',
        receiptDate: '2018-09-30T00:00:00',
        receiptPrice: 107000,
        receiptCurrency: 'руб.'
      },
      '11': {
        travelExpenseId: 11,
        tripId: 2,
        paymentPurpose: 'some payment purpose 2',
        receiptNumber: 'EF12312_2',
        receiptDate: '2018-09-30T00:00:00',
        receiptPrice: 107000,
        receiptCurrency: 'руб.'
      }
    }
  },
  result: [
    11,
    10
  ]
}

我想向 data.entities 添加额外的架构 expensesByTripId，所以结果应该类似于：

data: {
  entities: {
    expensesByTripId: {
       '2': [10, 11],
    },
    expenses: {
      '10': {
        travelExpenseId: 10,
        tripId: 2,
        paymentPurpose: 'some payment purpose 1',
        receiptNumber: 'EF12312_1',
        receiptDate: '2018-09-30T00:00:00',
        receiptPrice: 107000,
        receiptCurrency: 'руб.'
      },
      '11': {
        travelExpenseId: 11,
        tripId: 2,
        paymentPurpose: 'some payment purpose 2',
        receiptNumber: 'EF12312_2',
        receiptDate: '2018-09-30T00:00:00',
        receiptPrice: 107000,
        receiptCurrency: 'руб.'
      }
    }
  },
  result: [
    11,
    10
  ]
}

或者请提供适合我情况的任何其他方式

【问题讨论】：

标签： javascript reactjs redux schema normalizr

【解决方案1】：

let data = {
      entities: {
        expenses: {
          '10': {
            travelExpenseId: 10,
            tripId: 2,
            paymentPurpose: 'some payment purpose 1',
            receiptNumber: 'EF12312_1',
            receiptDate: '2018-09-30T00:00:00',
            receiptPrice: 107000,
            receiptCurrency: 'руб.'
          },
          '11': {
            travelExpenseId: 11,
            tripId: 2,
            paymentPurpose: 'some payment purpose 2',
            receiptNumber: 'EF12312_2',
            receiptDate: '2018-09-30T00:00:00',
            receiptPrice: 107000,
            receiptCurrency: 'руб.'
          }
        }
      },
      result: [
        11,
        10
      ]
    }

    let object = {};

    Object.values(data.entities.expenses).forEach(expenses => {
      
      let result = object[expenses.tripId] || [];
      object[expenses.tripId] = [...result, expenses.travelExpenseId];
    });

		data.entities["expensesByTripId"] = object;
    console.log(data);

我不确定Normalizr 的工作原理，但我正在使用 VanillaJS 根据您的要求定制一个

【讨论】：