Afr*_*Afr 6 transactions reference typeerror node.js firebase
我有firebase数据库函数的问题.该文档包含以下用于处理事务数据的最小示例:
var upvotesRef = db.ref("server/saving-data/fireblog/posts/-JRHTHaIs-jNPLXOQivY/upvotes");
upvotesRef.transaction(function (current_value) {
return (current_value || 0) + 1;
});
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现在,我的firebase数据库结构如下所示
/game-results
/RaUALJvTZVea5y6h1lzqGJPMpuI3
/distance
/score
/timestamp
/3ItAqKHL0XRUOum2Ajdz9hHQxMs1
/distance
/score
/timestamp
/statistics
/total-distance
/total-score
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我想总结得分和距离.我正在使用以下功能,这里用于total-distance:
const functions = require('firebase-functions');
exports.updateTotalDistance = functions.database.ref('/game-results/{userId}/distance')
.onWrite(event => {
const newDistance = event.data.val();
const distanceRef = functions.database.ref('/statistics/total-distance')
return distanceRef.transaction(function(currentDistance) {
console.log('currentDistance', currentDistance);
return (currentDistance || 0) + newDistance;
});
});
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但是,我无法解决为什么我在firebase函数日志中出现以下错误:
TypeError: distanceRef.transaction is not a function
at exports.updateTotalDistance.functions.database.ref.onWrite.event (/user_code/index.js:19:22)
at /user_code/node_modules/firebase-functions/lib/cloud-functions.js:35:20
at process._tickDomainCallback (internal/process/next_tick.js:129:7)
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为什么数据库引用不允许我编写事务数据?我想做的就是总结所有得分和距离.
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