Query a Firestore collection with an array_contains filter (async)
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Query a Firestore collection with an array_contains filter (async).
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For detailed documentation that includes this code sample, see the following:
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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 code demonstrates querying a Firestore collection using an \u003ccode\u003earray_contains\u003c/code\u003e filter.\u003c/p\u003e\n"],["\u003cp\u003eThe code sample utilizes the \u003ccode\u003eFieldFilter\u003c/code\u003e to search for documents where the "regions" field contains "west_coast" within an array.\u003c/p\u003e\n"],["\u003cp\u003eAuthentication to Firestore is required, using Application Default Credentials.\u003c/p\u003e\n"],["\u003cp\u003eFurther details and related documentation can be found in the "Perform simple and compound queries" and "Query and filter data" guides.\u003c/p\u003e\n"]]],[],null,["# Query a Firestore collection with an array_contains filter (async).\n\nExplore further\n---------------\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Perform simple and compound queries in Cloud Firestore](https://firebase.google.com/docs/firestore/query-data/queries)\n- [Query and filter data](/firestore/native/docs/query-data/queries)\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 cities_ref = db.collection(\"cities\")\n\n query = cities_ref.where(\n filter=FieldFilter(\"regions\", \"array_contains\", \"west_coast\")\n )\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)."]]
