猫鼬4.11.12预验证错误返回空JSON响应

Question

我有一个代码，猫鼬的模式，但在客户端，在Ajax响应返回Empty错误{}

tableSchema.pre('validate', function(next) { 
// You **must** do `new Error()`. `next('something went wrong')` will 
// **not** work 
var err = new Error('something went wrong'); 
next(err); 
}); 

控制台它表明ERROR

Error: something went wrong 
at model.<anonymous> (/Volumes/D/www/node_js/ck_app_server_client/server/model/AccountModel.js:48:13) 
at model._next (/Volumes/D/www/node_js/ck_app_server_client/server/node_modules/hooks-fixed/hooks.js:62:30) 
at model.proto.(anonymous function) [as $__original_validate] (/Volumes/D/www/node_js/ck_app_server_client/server/node_modules/hooks-fixed/hooks.js:108:20) 
at model.<anonymous> (/Volumes/D/www/node_js/ck_app_server_client/server/node_modules/mongoose/lib/plugins/validateBeforeSave.js:31:14) 
at model._next (/Volumes/D/www/node_js/ck_app_server_client/server/node_modules/hooks-fixed/hooks.js:62:30) 
at model.proto.(anonymous function) [as $__original_save] (/Volumes/D/www/node_js/ck_app_server_client/server/node_modules/hooks-fixed/hooks.js:108:20) 
at /Volumes/D/www/node_js/ck_app_server_client/server/node_modules/mongoose/lib/services/model/applyHooks.js:153:27 
at new Promise.ES6 (/Volumes/D/www/node_js/ck_app_server_client/server/node_modules/mongoose/lib/promise.js:45:3) 
at model.wrappedPointCut [as save] (/Volumes/D/www/node_js/ck_app_server_client/server/node_modules/mongoose/lib/services/model/applyHooks.js:131:23) 
at /Volumes/D/www/node_js/ck_app_server_client/server/routes/accounts.js:36:7 
at Layer.handle [as handle_request] (/Volumes/D/www/node_js/ck_app_server_client/server/node_modules/express/lib/router/layer.js:95:5) 
at next (/Volumes/D/www/node_js/ck_app_server_client/server/node_modules/express/lib/router/route.js:137:13) 
at Route.dispatch (/Volumes/D/www/node_js/ck_app_server_client/server/node_modules/express/lib/router/route.js:112:3) 
at Layer.handle [as handle_request] (/Volumes/D/www/node_js/ck_app_server_client/server/node_modules/express/lib/router/layer.js:95:5) 
at /Volumes/D/www/node_js/ck_app_server_client/server/node_modules/express/lib/router/index.js:281:22 
at Function.process_params (/Volumes/D/www/node_js/ck_app_server_client/server/node_modules/express/lib/router/index.js:335:12) 

Answer 1

同样的行为可以由此证明：

JSON.stringify(Error('something went wrong')) 

这导致{}，因为这是Error实例如何序列化为JSON。

如果你想它序列化到一些有意义的事情，你必须做出自己的结构：

JSON.stringify({ error : { message : err.message, stack : err.stack } }) 

也有plenty of modules，提供类似的东西。