有人可以向我解释为什么我收到此警告警告：在处理程序中创建了一个承诺，但在我执行以下代码时没有从它返回：
cache['deviceSlave'].getBySystemId(systemId).then(function(slavesMapping) {
// do other stuff
}).catch(function(err) {
// throw error
});
这是其余的代码：
var Promise = require('bluebird');
var _ = require('lodash');
var Redis = require('ioredis');
var config = require('/libs/config');
var redis = new Redis({
port: config.get('redis:port'),
host: config.get('redis:host'),
password: config.get('redis:key'),
db: 0
});
var self = this;
module.exports.getBySystemId = function(systemId) {
return new Promise(function(resolve, reject) {
var systemIds = [systemId];
self.getBySystemIds(systemIds).then(function(result) {
return resolve(_.values(result)[0]);
}).catch(function(err) {
return reject(err);
});
});
};
module.exports.getBySystemIds = function(systemIds) {
return new Promise(function(resolve, reject) {
var pipeline = redis.pipeline();
_.each(systemIds, function(systemId) {
var cacheKey = 'device_slaves:' + systemId.replace(/:/g, '');
// get through pipeline for fast retrieval
pipeline.get(cacheKey);
});
pipeline.exec(function(err, results) {
if (err) return reject(err);
else {
var mapping = {};
_.each(systemIds, function(systemId, index) {
var key = systemId;
var slaves = JSON.parse(results[index][1]);
mapping[key] = slaves;
});
return resolve(mapping);
}
});
});
};
我正在使用以下库：ioredis & bluebird。代码执行良好，一切正常！我只是不喜欢我收到无法解决的警告的事实！