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Options for creating a new transaction.
JSON representation
{// Union field mode can be only one of the following:"readOnly": {object (ReadOnly)},"readWrite": {object (ReadWrite)}// End of list of possible types for union field mode.}
Fields
Union field mode. The mode of the transaction. mode can be only one of the following:
The transaction can be used for both read and write operations.
ReadOnly
Options for a transaction that can only be used to read documents.
JSON representation
{// Union field consistency_selector can be only one of the following:"readTime": string// End of list of possible types for union field consistency_selector.}
Fields
Union field consistency_selector. The consistency mode for this transaction. If not set, defaults to strong consistency. consistency_selector can be only one of the following:
This must be a microsecond precision timestamp within the past one hour, or if Point-in-Time Recovery is enabled, can additionally be a whole minute timestamp within the past 7 days.
Uses RFC 3339, where generated output will always be Z-normalized and uses 0, 3, 6 or 9 fractional digits. Offsets other than "Z" are also accepted. Examples: "2014-10-02T15:01:23Z", "2014-10-02T15:01:23.045123456Z" or "2014-10-02T15:01:23+05:30".
ReadWrite
Options for a transaction that can be used to read and write documents.
Firestore does not allow 3rd party auth requests to create read-write. transactions.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-06-02 UTC."],[[["Transactions can be initiated in two modes: `readOnly` for read operations and `readWrite` for both read and write operations."],["`ReadOnly` transactions can specify a `readTime` for consistency, allowing reading documents at a specific past time within the last hour or, if enabled, within the last 7 days, with options for precision."],["`ReadWrite` transactions allow both reading and writing, and they support the `retryTransaction` field, which is a base64-encoded string."],["Firestore restricts third-party authorization requests from creating `readWrite` transactions."]]],[]]
