Reference type in firestore

Question

I'm trying to implement documentreference in firestore. I created two collections : Customers and Purchased-Property. How can i reference the Customer_id in the Purchased-Property_Customer_id everytime a new document is created in the Purchased-Property collection. The code is shown below:

 const CustomerDoc = firebase.firestore().collection("Customers").doc()
CustomerDoc.set({
       Customer_id: CustomerDoc.id,
       Customer_Name: Name
       Customer_PhoneNumber: PhoneNumber

    })

const PurchasedPropertyDoc = firebase.firestore().collection("Purchased-Property").doc()
    PurchasedPropertyDoc.set({
           Purchased_Property_id: PurchasedPropertyDoc.id,
           Purchased_Property_Name: Property_Name,
           Purchased_Property_Location: Property_Location,
           Purchased_Property_Customer_Id: Customer_Id   //How do i make  reference to this Customer_Id in the Customers collection everytime a new document under the Purchased-Property collection is made 


    
        })

Doug Stevenson · Accepted Answer · 2020-11-04 20:06:19Z

2

CustomerDoc is a DocumentReference object. Every DocumentReference has an id property. You can simply use it like this:

    PurchasedPropertyDoc.set({
           Purchased_Property_id: PurchasedPropertyDoc.id,
           Purchased_Property_Name: Property_Name,
           Purchased_Property_Location: Property_Location,
           Purchased_Property_Customer_Id: CustomerDoc.id
    })

It's no different than the way you first used CustomerDoc.id in your first document. If you don't have this reference available at the time you create the document, then you won't be able to make the association.

edited Nov 4, 2020 at 20:06

answered Nov 4, 2020 at 15:57

Doug Stevenson

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2 Comments

user23424 Over a year ago

How then can i use the reference data type for easier location of the Customer_Id since the answer above, which is correct, store it as a string

Doug Stevenson Over a year ago

Using a reference type isn't necessarily any easier. You still have to make a query for the other document. But you can just pass CustomerDoc directly if you want a reference.

marc_s · Accepted Answer · 2023-07-10 05:35:55Z

0

You have to create a ref like:

const CustomerRef = db.collection( "users" ).doc( userId )

and then set as Purchased_Property_Customer_Id:CustomerRef

edited Jul 10, 2023 at 5:35

marc_s

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answered Jun 1, 2023 at 15:28

Wagner Guimarães

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1 Comment

DSDmark Over a year ago

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