Reads entities as they were at the given time. This may not be older
than 270 seconds. This value is only supported for Cloud Firestore in
Datastore mode.
The identifier of the transaction in which to read. A
transaction identifier is returned by a call to
[Datastore.BeginTransaction][google.datastore.v1.Datastore.BeginTransaction].
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07 UTC."],[[["\u003cp\u003eThe \u003ccode\u003eReadOptions\u003c/code\u003e class defines the options for read requests in the Google Cloud Datastore V1.\u003c/p\u003e\n"],["\u003cp\u003eThe latest version of the \u003ccode\u003eReadOptions\u003c/code\u003e documentation is 4.15.0, and previous versions are available for review, ranging back to version 3.2.0.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eReadOptions\u003c/code\u003e implements several interfaces, including \u003ccode\u003eIMessage\u003c/code\u003e, \u003ccode\u003eIEquatable\u003c/code\u003e, \u003ccode\u003eIDeepCloneable\u003c/code\u003e, and \u003ccode\u003eIBufferMessage\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eReadOptions\u003c/code\u003e allows specification of read consistency, transaction identifiers, and read time for read operations, with read consistency of \u003ccode\u003eSTRONG\u003c/code\u003e not available for global queries, and the read time can not be older than 270 seconds.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eReadOptions\u003c/code\u003e offers two constructors, a default one and another that allows copying the attributes of an existing \u003ccode\u003eReadOptions\u003c/code\u003e object.\u003c/p\u003e\n"]]],[],null,[]]
