[[["容易理解","easyToUnderstand","thumb-up"],["確實解決了我的問題","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["缺少我需要的資訊","missingTheInformationINeed","thumb-down"],["過於複雜/步驟過多","tooComplicatedTooManySteps","thumb-down"],["過時","outOfDate","thumb-down"],["翻譯問題","translationIssue","thumb-down"],["示例/程式碼問題","samplesCodeIssue","thumb-down"],["其他","otherDown","thumb-down"]],["上次更新時間：2025-07-25 (世界標準時間)。"],[],[],null,["\u003cbr /\u003e\n\n\u003cbr /\u003e\n\nFirebase Security Rules provide robust, completely customizable protection for your data in\nCloud Firestore, Realtime Database, and Cloud Storage. You can easily get\nstarted with Rules following the steps in this guide, securing your\ndata and protecting your app from malicious users.\n\nUnderstand the Firebase Security Rules language\n\nBefore you start writing rules, it's worthwhile to take some time to review\nthe specific Firebase Security Rules language for the Firebase products you're using.\nCloud Storage leverages a superset\nof the Common Expression Language (CEL) that relies on `match` and `allow`\nstatements that set a condition for access at a defined path..\n\nStart by learning the [core syntax of the Firebase Security Rules language](/docs/storage/security/core-syntax).\n\nSet up Authentication\n\nIf you haven't done it already, add [Firebase Authentication to your app](/docs/auth).\nFirebase Authentication supports many common authentication methods and integrates with\nFirebase Security Rules to provide comprehensive verification capabilities.\n\nYou can set up additional, custom authentication information for your app.\n\nLearn more about [Firebase Security Rules and Firebase Authentication](/docs/rules/rules-and-auth).\n\nDefine your data and rules structures\n\nThe way you structure your data might affect the way you structure and\nimplement your rules. As you define your data structures, consider the\nimplications they might have on your Rules structure.\n\nFor example, in Cloud Storage, you might want to include\na field that denotes a specific role for each user. Then, your rules can read\nthat field and use it to grant role-based access. You can also create\na Cloud Firestore database, store access criteria in Cloud Firestore\ndocuments, then access those documents from Cloud Storage Security Rules.\n\nAs you define your data and rules architectures, keep in mind the way that\nrules cascade or don't cascade, depending on your product. With Realtime Database,\nrules work from top-down, with shallower rules overriding deeper rules. If a\nrule grants read or write permissions at a particular path, then it also grants\naccess to all child nodes under it. In contrast, with Cloud Firestore and\nCloud Storage, rules apply only at specified levels of the data hierarchy,\nand you write explicit rules to control access to different levels.\n\nAccess your rules\n\nTo view your existing Rules, use either the Firebase CLI or the\nFirebase console. Make sure you edit your rules using the same method,\nconsistently, to avoid mistakenly overwriting updates. If you're not sure\nwhether your locally defined rules reflect the most recent updates, the Firebase\nconsole always shows the most recently deployed version of your Firebase Security Rules.\n\nTo access your rules from the [Firebase console](//console.firebase.google.com/), select your\nproject, then in the left-hand navigation panel, click\n**Storage** . Click **Rules** once you're\nin the correct database or storage bucket.\n\nTo access your rules from the Firebase CLI, go to the\nrules file noted in your [firebase.json file](/docs/cli#the_firebasejson_file).\n\nWrite basic rules\n\nAs you're developing your app and understanding Rules, try\nimplementing Rules to address a few [basic use cases](/docs/rules/basics),\nincluding the following:\n\n- **Content-owner only:** Restrict access to content by user.\n- **Mixed access:** Restrict write access by user, but allow public read access.\n- **Attribute-based access:** Restrict access to a group or type of user.\n\nTest your rules\n\nIf you're setting up your Firebase Security Rules in the Firebase console, you can use\nthe [Firebase Rules Playground](/docs/rules/simulator) to quickly validate\nbehavior. However, we recommend more thorough testing with the\n[Local Emulator Suite](/docs/rules/emulator-setup) before you deploy your\nchanges to production.\n\nDeploy rules\n\nUse the Firebase console or the Firebase CLI to deploy your rules\nto production. Follow the steps outlined in\n[Manage and deploy Firebase Security Rules](/docs/rules/manage-deploy)."]]
