UnhandledPromiseRejectionWarning：未處理的承諾拒絕（拒絕ID：2）：TypeError：無法讀取未定義的屬性'type'＃3090

Question

我在環迴應用程序中創建模型之間的關係，但執行以下命令時 slc loopback:relation I引發以下錯誤。

錯誤

(node:6444) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 2): TypeError: Cannot read property 'type' of undefined 


events.js:160 
     throw er; // Unhandled 'error' event 
    ^

TypeError: Cannot read property 'type' of undefined 
    at C:\Users\DELL5110\AppData\Roaming\npm\node_modules\strongloop\node_modules\inquirer\lib\objects\choices.js:16:12 
    at Array.map (native) 
    at new module.exports (C:\Users\DELL5110\AppData\Roaming\npm\node_modules\strongloop\node_modules\inquirer\lib\objects\choices.js:15:26) 
    at Prompt.module.exports (C:\Users\DELL5110\AppData\Roaming\npm\node_modules\strongloop\node_modules\inquirer\lib\prompts\base.js:43:24) 
    at new Prompt (C:\Users\DELL5110\AppData\Roaming\npm\node_modules\strongloop\node_modules\inquirer\lib\prompts\list.js:26:8) 
    at PromptUI.fetchAnswer (C:\Users\DELL5110\AppData\Roaming\npm\node_modules\strongloop\node_modules\inquirer\lib\ui\prompt.js:77:16) 
    at tryCatcher (C:\Users\DELL5110\AppData\Roaming\npm\node_modules\strongloop\node_modules\rx\dist\rx.js:63:31) 
    at InnerObserver.Rx.FlatMapObservable.InnerObserver.next (C:\Users\DELL5110\AppData\Roaming\npm\node_modules\strongloop\node_modules\rx\dist\rx.js:2140:43) 
    at InnerObserver.Rx.internals.AbstractObserver.AbstractObserver.onNext (C:\Users\DELL5110\AppData\Roaming\npm\node_modules\strongloop\node_modules\rx\dist\rx.js:1762:31) 
    at InnerObserver.tryCatcher (C:\Users\DELL5110\AppData\Roaming\npm\node_modules\strongloop\node_modules\rx\dist\rx.js:63:31) 
    at AutoDetachObserverPrototype.next (C:\Users\DELL5110\AppData\Roaming\npm\node_modules\strongloop\node_modules\rx\dist\rx.js:5883:51) 
    at AutoDetachObserver.Rx.internals.AbstractObserver.AbstractObserver.onNext (C:\Users\DELL5110\AppData\Roaming\npm\node_modules\strongloop\node_modules\rx\dist\rx.js:1762:31) 
    at InnerObserver.next (C:\Users\DELL5110\AppData\Roaming\npm\node_modules\strongloop\node_modules\rx\dist\rx.js:3547:65) 
    at InnerObserver.Rx.internals.AbstractObserver.AbstractObserver.onNext (C:\Users\DELL5110\AppData\Roaming\npm\node_modules\strongloop\node_modules\rx\dist\rx.js:1762:31) 
    at InnerObserver.tryCatcher (C:\Users\DELL5110\AppData\Roaming\npm\node_modules\strongloop\node_modules\rx\dist\rx.js:63:31) 
    at AutoDetachObserverPrototype.next (C:\Users\DELL5110\AppData\Roaming\npm\node_modules\strongloop\node_modules\rx\dist\rx.js:5883:51) 

slc -v

strongloop v6.0.3 (node v6.9.2) 
├── strong-arc@1.8.9 (3dd25ac) 
├── strong-build@2.1.2 (a98f310) 
├── strong-deploy@3.1.4 (9b29df0) 
├── strong-mesh-models@8.1.0 (62e539b) 
├── strong-pm@5.2.3 
├── strong-registry@1.1.6 (f8c2339) 
├── strong-start@1.3.4 (28c261d) 
├─┬ strong-supervisor@3.3.3 
│ └── strong-agent@2.1.1 (b51fc45) 
├── generator-loopback@1.25.0 (6a0e2c0) 
├── node-inspector@0.7.5 (16841d6) 
└── nodefly-register@0.3.3 

節點：6.9.2 NPM：3.10.9

我使用MongoDB的高配車型

這裏是我的項目

https://github.com/rizvanhaider/node-shop

Answer 1

問題是由https://github.com/strongloop/loopback/issues/3090#issuecomment-274183440 的問題解決了在普通/模型/目錄錯誤的地方的模型config.json文件。 如果有人面臨着同樣的問題，環回，請檢查您是否正確以下項目結構，在車型目錄特別是沒有多餘的或不需要的東西。