where does "db" come from? #265

carcinocron · 2022-01-22T21:39:50Z

Almost all the docs do this, I have no idea where "db" came from. I'm also not sure if I should be using web9 or nodejs, but it's often a lot of samples are missing one or both, or are less clearly labeled.

snippets-web/snippets/firestore-next/test-firestore/transaction.js

Lines 8 to 23 in 1c4c683

    
           import
 {
 runTransaction
 }
 from
 "firebase/firestore"
;
 
           try
 {
 
             await
 runTransaction
(
db
,
 async
 (
transaction
)
 =>
 {
 
               const
 sfDoc
 =
 await
 transaction
.
get
(
sfDocRef
)
;
 
               if
 (
!
sfDoc
.
exists
(
)
)
 {
 
                 throw
 "Document does not exist!"
;
 
               }
 
               const
 newPopulation
 =
 sfDoc
.
data
(
)
.
population
 +
 1
;
 
               transaction
.
update
(
sfDocRef
,
 {
 population
: 
newPopulation
 }
)
;
 
             }
)
;
 
             console
.
log
(
"Transaction successfully committed!"
)
;
 
           }
 catch
 (
e
)
 {
 
             console
.
log
(
"Transaction failed: "
,
 e
)
;
 
           }

Tim4497 · 2022-07-25T08:55:27Z

const firebaseConfig = {
  apiKey: 
  authDomain: 
  projectId: 
  storageBucket: 
  messagingSenderId: 
  appId: 
};

const app = initializeApp(firebaseConfig);

const db = getFirestore(app);

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where does "db" come from? #265

where does "db" come from? #265

carcinocron commented Jan 22, 2022

Tim4497 commented Jul 25, 2022 •

edited

where does "db" come from? #265

where does "db" come from? #265

Comments

carcinocron commented Jan 22, 2022

Tim4497 commented Jul 25, 2022 • edited

Tim4497 commented Jul 25, 2022 •

edited