How to fetch data from two firestore collection, merge and display it

问题

I have two collections namely CURRENCY_PAIR and CURRENCY_PAIR_LIMIT. The CURRENCY_PAIR collection has the following fields in each document:

• CurrencyPair_Name
• CurrencyPair_id
• Currency_AskPrice
• Currency_BidPrice

and theCURRENCY_PAIR_LIMIT collection contain the following fields in each document:

• Limit_id
• Limit_Buy_Price_Threshhold
• Limit_Sell_Price_Threshhold
• Limit_Currency_Pair_Id (references to the Currencypair_Id in the CURRENCY_PAIR collection)

I wanted to map each CurrencyPair_Name to its respective Limit_Buy_Price_Threshhold and Limit_Sell_Price_Threshhold then display them in react but i'm stuck. How can i get around this.

来源：https://stackoverflow.com/questions/64953805/how-to-fetch-data-from-two-firestore-collection-merge-and-display-it