service <<name>> {
// Match the resource path.
match <<path>> {
// Allow the request if the following conditions are true.
allow <<methods>> : if <<condition>>
}
}
如果是 Realtime Database,以 JSON 為基礎的 Rules 會使用下列語法:
{
"rules": {
"<<path>>": {
// Allow the request if the condition for each method is true.
".read": <<condition>>,
".write": <<condition>>
}
}
}
Rules 要套用為 OR 陳述式,而非 AND 陳述式。
因此如果有多個規則與路徑相符,且只要有任一規則相符
條件會授予存取權,Rules 則會授予該層級資料的存取權
路徑。因此,如果廣泛規則授予資料存取權,就無法
採用更具體的規則不過,請確保您的
Rules不會重疊。有 Firebase Security Rules 個旗標與
比對路徑做為編譯器警告
[[["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:2025-07-24 (世界標準時間)。"],[],[],null,["Firebase Security Rules \nplat_ios plat_android plat_web plat_flutter plat_node \nUse our flexible, extensible Firebase Security Rules to\nsecure your data in Cloud Firestore, Firebase Realtime Database, and\nCloud Storage.\n\nFirebase Security Rules stand between your data and malicious users. You can write simple or\ncomplex rules that protect your app's data to the level of granularity that\nyour specific app requires.\n\nFirebase Security Rules leverage\nextensible, flexible configuration languages to define what data your users\ncan access for Realtime Database, Cloud Firestore, and Cloud Storage.\nFirebase Realtime Database Security Rules leverage JSON in rule definitions, while\nCloud Firestore Security Rules and Firebase Security Rules for Cloud Storage leverage a unique\nlanguage built to accommodate more complex rules-specific structures.\n\nLearn more about how to set up Rules for the specific Firebase products\nyou use in your app, and how Rules behavior differs across Firebase\nproducts.\n\n[Get started](/docs/rules/get-started)\n\nKey capabilities\n\n|----------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| Flexibility | Write custom rules that make sense for your app's structure and behavior. Rules use languages that allow you to leverage your own data to authorize access. |\n| Granularity | Your rules can be as broad or as narrow as you need. |\n| Independent security | Because Rules are defined outside of your app (in the Firebase console or Firebase CLI), clients aren't responsible for enforcing security, bugs don't compromise data, and your data is always protected. |\n\nHow do they work?\n\nFirebase Security Rules work by matching a pattern against database paths, and then applying\ncustom conditions to allow access to data at those paths. All Rules\nacross Firebase products have a path-matching component and a conditional\nstatement allowing read or write access. You must define Rules for\neach Firebase product you use in your app.\n\nFor Cloud Firestore and Cloud Storage, Rules use the following\nsyntax: \n\n service \u003c\u003cname\u003e\u003e {\n // Match the resource path.\n match \u003c\u003cpath\u003e\u003e {\n // Allow the request if the following conditions are true.\n allow \u003c\u003cmethods\u003e\u003e : if \u003c\u003ccondition\u003e\u003e\n }\n }\n\nFor Realtime Database, JSON-based Rules use the following syntax: \n\n {\n \"rules\": {\n \"\u003c\u003cpath\u003e\u003e\": {\n // Allow the request if the condition for each method is true.\n \".read\": \u003c\u003ccondition\u003e\u003e,\n \".write\": \u003c\u003ccondition\u003e\u003e\n }\n }\n }\n\nRules are applied as `OR` statements, not `AND` statements.\nConsequently, if multiple rules match a path, and any of the matched\nconditions grants access, Rules grant access to the data at that\npath. Therefore, if a broad rule grants access to data, you can't restrict with\na more specific rule. You can, however, avoid this problem by making sure your\nRules don't overlap too much. Firebase Security Rules flag overlaps in your\nmatched paths as compiler warnings.\n\nFirebase Security Rules can also leverage Authentication to grant user-based permissions, and the\nconditions you set can be very basic or incredibly complex. Learn more\nabout Rules [language](/docs/rules/rules-language) and [behavior](/docs/rules/rules-behavior)\nbefore you start writing Rules.\n\nImplementation path\n\n|---|-------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------|\n| | Integrate the product SDKs | Set up [Cloud Firestore](/docs/firestore), [Cloud Storage](/docs/storage), or [Realtime Database](/docs/database) for your app. |\n| | Write your Firebase Security Rules | Learn more about [how Rules work](/docs/rules/rules-behavior) and [set up some basic Rules](/docs/rules/basics) |\n| | Test your Firebase Security Rules | Use the Realtime Database and Cloud Firestore emulators to test your app's behavior and validate your rules before you deploy them to production. |\n| | Deploy your Firebase Security Rules | Use the Firebase console or the Firebase CLI to deploy your rules to production. |\n\nNext steps\n\n- [Understand the Firebase Security Rules language](/docs/rules/rules-language).\n- Learn more about [how Firebase Security Rules work](/docs/rules/rules-behavior).\n- Explore the [common mistakes you should avoid](/docs/rules/insecure-rules)."]]