如果这些数据需要每个数据的价格，我应该使用什么数据结构？

发布于 2025-01-11 14:00:54 字数 283 浏览 0 评论 0原文

我有这个产品数据，一旦为特定产品下了订单，我还需要减去颜色的数量。

现在，这是我的数据结构，其中 colorMap 是一个 Map。

问题：如果我需要每种颜色有不同的价格怎么办？我应该将 colorMap 更改为数组吗？

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回眸一笑 2025-01-18 14:00:54

据我了解，颜色的价格丢失了。假设每种颜色的价格不同，解决此问题的最合适方法是在文档中创建一个名为 colors 的 Color 对象数组，如下所示：

$docId
  |
  --- cat: "ML"
  |
  --- colors (array)
  |    |
  |    --- 0
  |    |   |
  |    |   --- colorName: "Black"
  |    |   |
  |    |   --- quantity: 20
  |    |   |
  |    |   --- price: 11.99
  |    |
  |    --- 1
  |        |
  |        --- colorName: "Green"
  |        |
  |        --- quantity: 5
  |        |
  |        --- price: 14.99
  |
  --- price: 200 //Remove that if not necessary
  |
  --- prodName: "Thumbler"
  |
  --- size: "500"

通过这种方式，您可以简单地读取数组并计算总数。

由于您没有设置标签，因此我们不知道您正在构建适用于 Android、iOS 还是 Web 的应用程序。如果碰巧它适用于 Android，这里有一篇有用的文章：

如何将 Cloud Firestore 中的对象数组映射到对象列表？

As far as I understand, the price of the color is missing. Assuming that you have a different price for each color, the most appropriate way to solve this would be to create inside the document, an array of Color objects called colors like this:

$docId
  |
  --- cat: "ML"
  |
  --- colors (array)
  |    |
  |    --- 0
  |    |   |
  |    |   --- colorName: "Black"
  |    |   |
  |    |   --- quantity: 20
  |    |   |
  |    |   --- price: 11.99
  |    |
  |    --- 1
  |        |
  |        --- colorName: "Green"
  |        |
  |        --- quantity: 5
  |        |
  |        --- price: 14.99
  |
  --- price: 200 //Remove that if not necessary
  |
  --- prodName: "Thumbler"
  |
  --- size: "500"

In this way, you can simply read the array and calculate the total.

Since you didn't set a tag, we don't know if you are building an app that is for Android, iOS, or web. If by chance it's for Android, here is a useful article: