public sealed class ExistenceFilter : IMessage<ExistenceFilter>, IEquatable<ExistenceFilter>, IDeepCloneable<ExistenceFilter>, IBufferMessage, IMessage
Reference documentation and code samples for the Firestore v1 API class ExistenceFilter.
A digest of all the documents that match a given target.
[[["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complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-07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\u003eThis webpage provides reference documentation for the \u003ccode\u003eExistenceFilter\u003c/code\u003e class within the Google Cloud Firestore v1 API, detailing its purpose as a digest for documents matching a target.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eExistenceFilter\u003c/code\u003e class implements multiple 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\u003eThe latest version of the API available is 3.10.0, with numerous previous versions, dating back to 2.3.0, also being accessible and documented here.\u003c/p\u003e\n"],["\u003cp\u003eThe class has two properties, \u003ccode\u003eCount\u003c/code\u003e which represents the total count of documents that match the \u003ccode\u003etarget_id\u003c/code\u003e, and \u003ccode\u003eTargetId\u003c/code\u003e, which is the ID of the target the filter applies to.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eExistenceFilter\u003c/code\u003e class includes two constructors: a parameterless constructor \u003ccode\u003eExistenceFilter()\u003c/code\u003e and a copy constructor \u003ccode\u003eExistenceFilter(ExistenceFilter other)\u003c/code\u003e.\u003c/p\u003e\n"]]],[],null,[]]
