Resolving typescript
Clash Royale CLAN TAG#URR8PPPResolving typescript
How do I work with Firebase and my own Typescript interfaces?
ie. I have a function here that I'm going to need the full Payment object, (not just the delta), so I get that via the DocumentReference object.
Payment
DocumentReference
exports.resolveStripeCharge = functions.firestore.document('/payments/{paymentId}')
.onWrite((change : Change <DocumentSnapshot>) => {
change.after.ref.get().then((doc: DocumentSnapshot )=> {
const payment : Payment = doc.data();
})
[ts]
Type 'DocumentData' is not assignable to type 'Payment'.
Property 'amount' is missing in type 'DocumentData'.
const payment: Payment
I get that the returned object wont necessarily conform the interface - but in anycase -what should I do here - if I want to enforce typing?
Do I just use:
const payment : Payment = <Payment>doc.data();
Or is there a much nicer solution?
1 Answer
1
The solution you have is just typecasting the doc.data(). That is
not a solution, its a workaround. Because, by doing so you might face
run time errors.
doc.data()
So, what I would suggest is, just use :
const payment = doc.data()
const payment = doc.data()
In case of const, the typing will be automatically enforced.
const
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