javascript - 如何在 firestore 中插入和自动删除不必要的或空的

Question

我正在尝试一些方法来完全删除插入数据时为空的字段1

例如:我是 1 用户 A 我有姓名、年龄和国家/地区为 null 但我不希望它在数据库中添加国家/地区字段

像这样

db.collection("user").doc().set({
    name: "A",
    age: "18",
    country: "" or country: null or country:'null'
}).then(() => {
    console.log("Document successfully written!");
})

我想要这样

Collection(user)=>randomUid=>data(name:'A',age:'18')

Answer 1

您可以使用 spread syntax 实现此目的和一个条件对象。

const country = /* ... value from form/page/etc ... */;

db.collection("user").doc()
  .set({
    name: "A",
    age: "18",
    // if country is truthy and also not "null", include it, otherwise, omit it.
    ...(country && country !== "null" ? { country } : {})
  })
  .then(() => {
    console.log("Document successfully written!");
  })
  .catch(err => console.error) // don't forget to handle errors!