Increment a Firestore document field (async)
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Update a Firestore document field using Increment (async).
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For detailed documentation that includes this code sample, see the following:
Code sample
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[[["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"]],[],[[["\u003cp\u003eThis content demonstrates how to update a Firestore document field using the \u003ccode\u003eIncrement\u003c/code\u003e function in Python asynchronously.\u003c/p\u003e\n"],["\u003cp\u003eThe code sample provided updates the "population" field of a document in the "cities" collection by adding 50 to its existing value.\u003c/p\u003e\n"],["\u003cp\u003eAuthentication to Firestore is required and can be set up using Application Default Credentials, as outlined in the linked documentation.\u003c/p\u003e\n"],["\u003cp\u003eAdditional information on adding and updating data in Firestore is available in the linked resources, which include detailed documentation.\u003c/p\u003e\n"]]],[],null,["# Increment a Firestore document field (async)\n\nUpdate a Firestore document field using Increment (async).\n\nExplore further\n---------------\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Add and update data](/firestore/native/docs/manage-data/add-data)\n- [Add data to Cloud Firestore](https://firebase.google.com/docs/firestore/manage-data/add-data)\n\nCode sample\n-----------\n\n### Python\n\n\nTo authenticate to Firestore, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n washington_ref = db.collection(\"cities\").document(\"DC\")\n\n await washington_ref.update({\"population\": firestore.Increment(50)})\n\nWhat's next\n-----------\n\n\nTo search and filter code samples for other Google Cloud products, see the\n[Google Cloud sample browser](/docs/samples?product=firestore)."]]
