[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07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 latest version available is 3.12.0, but the current page content is related to version 3.3.0 of the Firestore Admin v1 API.\u003c/p\u003e\n"],["\u003cp\u003eThis page provides reference documentation and code samples for the \u003ccode\u003eDatabase.Types.ConcurrencyMode\u003c/code\u003e enum within the Firestore Admin v1 API.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eConcurrencyMode\u003c/code\u003e enum defines the type of concurrency control mode for transactions, with options including \u003ccode\u003eOptimistic\u003c/code\u003e, \u003ccode\u003eOptimisticWithEntityGroups\u003c/code\u003e, \u003ccode\u003ePessimistic\u003c/code\u003e, and \u003ccode\u003eUnspecified\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003e\u003ccode\u003eOptimistic\u003c/code\u003e and \u003ccode\u003ePessimistic\u003c/code\u003e modes are available for Cloud Firestore, while \u003ccode\u003eOptimisticWithEntityGroups\u003c/code\u003e is the only available mode for Cloud Datastore, though also available (but not recommended) for Firestore in Datastore mode, and \u003ccode\u003eUnspecified\u003c/code\u003e is not used.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003ePessimistic\u003c/code\u003e concurrency control mode is the default for Cloud Firestore databases.\u003c/p\u003e\n"]]],[],null,[]]
