To get actual document data, call the data() method on the docSnap object. The getDoc() method will return a promise, add await keyword in front of it.Īssign it to a constant called docSnap (short form for document snapshot).
Invoke the getDoc() method passing docRef as an argument to it. const docRef = doc(db, "cities", "2l3bcSGs2vZBIc3RODwp") ID of a document → 2l3bcSGs2vZBIc3RODwp in this case (see the screenshot above)Ĭall the doc() method, pass three arguments and assign it to a constant called docRef (short form for document reference).Collection name → cities in this case (see the screenshot above).The three arguments of the doc() method are: The getDoc() method takes a single argument which is the doc() method. Initialize Firestore Database const db = getFirestore() The import statement uses the CDN version of the Firebase SDK in this example. getDoc() → getDoc() query gets data of a specific document from collection based on references mentioned in the doc() method.In particular, if all of the keys are integers, and more than half of the keys between 0 and the maximum key in the object have non-empty values, then Firebase. val() or use the REST api to read data, if the data looks like an array, Firebase will render it as an array. doc() → It takes references of database, collection name and ID of a document as arguments However, to help people that are storing arrays in Firebase, when you call.Import Firestore Database and de-structure the three methods that we need: In this case: Edmonton document using its ID ( 2l3bcSGs2vZBIc3RODwp) Let’s get the first document of the cities collection by id. The sample Firestore Database has a cities collection that has four documents in it like in the screenshot below.
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Learn how to get document by ID using the getDoc() method in Firebase version 9 Cloud Firestore Database.
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