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Transaction class

A reference to a transaction.

The Transaction object passed to a transaction's updateFunction provides the methods to read and write data within the transaction context. See runTransaction().

Signature:

export declare class Transaction 

Methods

Method	Modifiers	Description
delete(documentRef)		Deletes the document referred to by the provided DocumentReference.
get(documentRef)		Reads the document referenced by the provided DocumentReference.
set(documentRef, data)		Writes to the document referred to by the provided DocumentReference. If the document does not exist yet, it will be created.
set(documentRef, data, options)		Writes to the document referred to by the provided DocumentReference. If the document does not exist yet, it will be created. If you provide merge or mergeFields, the provided data can be merged into an existing document.
update(documentRef, data)		Updates fields in the document referred to by the provided DocumentReference. The update will fail if applied to a document that does not exist.
update(documentRef, field, value, moreFieldsAndValues)		Updates fields in the document referred to by the provided DocumentReference. The update will fail if applied to a document that does not exist.Nested fields can be updated by providing dot-separated field path strings or by providing FieldPath objects.