自从Firebase功能达到1.0版以来，这种行为就不再没有记载，而已进行了重大更改。请务必阅读文档。
上下文已添加到云功能，您可以像这样使用它
exports.dbWrite = functions.database.ref('/path/with/{id}').onWrite((data, context) => { const authVar = context.auth; // Auth information for the user. const authType = context.authType; // Permissions level for the user. const pathId = context.params.id; // The ID in the Path. const eventId = context.eventId; // A unique event ID. const timestamp = context.timestamp; // The timestamp at which the event happened. const eventType = context.eventType; // The type of the event that triggered this function. const resource = context.resource; // The resource which triggered the event. // ...});
