create<T> method
Create a document with the provided object values. This will fail the batch if a document exists at its location.
documentRef
: A reference to the document to be created.data
The object to serialize as the document.
Throws if the provided input is not a valid Firestore document.
final writeBatch = firestore.batch();
final documentRef = firestore.collection('col').doc();
writeBatch.create(documentRef, {foo: 'bar'});
writeBatch.commit().then(() {
print('Successfully executed batch.');
});
Implementation
void create<T>(DocumentReference<T> ref, T data) {
final firestoreData = ref._converter.toFirestore(data);
_validateDocumentData('data', firestoreData, allowDeletes: false);
_verifyNotCommited();
final transform = _DocumentTransform.fromObject(ref, firestoreData);
transform.validate();
final precondition = Precondition.exists(false);
firestore1.Write op() {
final document = DocumentSnapshot._fromObject(ref, firestoreData);
final write = document._toWriteProto();
if (transform.transforms.isNotEmpty) {
write.updateTransforms = transform.toProto(firestore._serializer);
}
write.currentDocument = precondition._toProto();
return write;
}
_operations.add((docPath: ref.path, op: op));
}