如何使用python遍历每个firebase数据库子级? [英] How to loop through each firebase database child with python?

问题描述

我有这个Firebase数据结构

I have this firebase data structure

我想在firebase生成的密钥下打印所有密钥(即从3030-00-809-7702到newNSN)，所以我使用此代码

I want to print all the keys under the firebase generated keys (i.e from 3030-00-809-7702 to newNSN) so I use this code

Inventory = db.child("Inventories").get()
for business in Inventory.each():
businessid = business.key()
productdb = db.child("Inventories").child(businessid).get()


for product in productdb.each():
    productid = product.key()
print(businessid)
print(productid)

但是我得到的是这个

因此仅打印最后一个按键，而不是所有按键.我做错了什么，如何打印所有键?

so only the last keys are being printed instead of all the keys. What am I doing wrongly and how can I get it to print all the keys ?

推荐答案

只需在当前树上打印值即可获得整个内容

Just print the value at the current tree to get the whole thing

inventory = db.child("Inventories").get()
for business in inventory.each():
    print(business.val())

或者您要进行迭代，这对于从N个孩子那里向Firebase请求N个项目的效率低下.

Or you go iterate it, which is really inefficient to request N items from Firebase for N children.

inventorydb = db.child("Inventories")
for businessid in inventorydb.shallow().get().each():
    productdb = inventory.child(businessid)
    # print the ids
    print([id for id in productdb.shallow().get()])

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