好吧，我正在运行一个循环：
...
if (buyerType === 'coletiva') {
let counter = 0
let buyersInfo = allPurchase.friends
let promises = []
let db = admin.firestore()
let batch = db.batch()
buyersInfo.forEach(runner => {
let purchaseInfo = allPurchase
let purchaseFunction = {}
counter = counter + 1;
console.log('counter é:', counter)
delete purchaseInfo.friends
purchaseInfo.priceCents = runner.price
purchaseInfo.totalTaxPaid = 600
purchaseInfo.iuguTaxPaid = 198
purchaseInfo.kmaisTaxPaid = 402
purchaseInfo.status = 'paid'
purchaseInfo.runnerCpf = runner.runnerCpf
purchaseInfo.modality = runner.modality
purchaseInfo.sex = runner.sex
purchaseInfo.age = runner.age
purchaseInfo.birth = runner.birth
purchaseInfo.buyerName = runner.buyerName
console.log('número de corredor é:', (oldCounter + counter))
purchaseInfo.runnerNumber = (oldCounter + counter)
console.log('purchase info:', purchaseInfo)
batch.set(admin.firestore().collection('purchases').doc(`${purchaseId}` + '_' + counter), purchaseInfo)
})
return batch.commit()
}
“ oldCounter +计数器”必须是普通数字。
例如：
我有一个带有3个运行器的循环，oldCounter +计数器必须为：1 ... 2 ... 3 ...显示正确（如我在Firebase Console中所看到的那样，它们工作正常），但是当Firebase运行时在数据库上设置文件，文件具有相同的价值！！ （runnerNumber总是返回最后一个数字，例如3）。
为什么Firebase只能设置数组中的最后一个字段，而不设置其他文档？
正在创建“ documentKey_1”，“ documentKey_2”，“ documentKey_3” ...，但是在文档内部，所有字段均来自上一个文档！
如何解决？