javascript - MongooseJS 奇怪的转换错误，路由名称错误

Question

我正在开发后端，并且我有这条路由，它应该只从数据库返回一个 ID 数组，以便稍后延迟加载。我的路线定义如下:

 router.get('/list', (req, res) => {
   Insider.find({}, {_id}).then(insiders => {
     if (!insiders) {
       res.status(400).json({ error: 'unable to find list of insiders' });
     }
     res.json(insiders);
   }).catch(err => res.status(400).json(err));
 });

它应该返回一个像这样的数组[_id, _id, _id...]

但是我遇到了一个非常奇怪的错误:

Cast to ObjectId failed for value "list" at path "_id" for model "insiders" CastError: Cast to ObjectId failed for value "list" at path "_id" for model "insiders" at new CastError (C:\Users\rutherfordc\Documents\GitHub\ccs-express-mongo\node_modules\mongoose\lib\error\cast.js:27:11) at ObjectId.cast (C:\Users\rutherfordc\Documents\GitHub\ccs-express-mongo\node_modules\mongoose\lib\schema\objectid.js:158:13) at ObjectId.SchemaType.applySetters (C:\Users\rutherfordc\Documents\GitHub\ccs-express-mongo\node_modules\mongoose\lib\schematype.js:724:12) at ObjectId.SchemaType._castForQuery (C:\Users\rutherfordc\Documents\GitHub\ccs-express-mongo\node_modules\mongoose\lib\schematype.js:1113:15) at ObjectId.SchemaType.castForQuery (C:\Users\rutherfordc\Documents\GitHub\ccs-express-mongo\node_modules\mongoose\lib\schematype.js:1103:15) at ObjectId.SchemaType.castForQueryWrapper (C:\Users\rutherfordc\Documents\GitHub\ccs-express-mongo\node_modules\mongoose\lib\schematype.js:1082:15) at cast (C:\Users\rutherfordc\Documents\GitHub\ccs-express-mongo\node_modules\mongoose\lib\cast.js:300:32) at model.Query.Query.cast (C:\Users\rutherfordc\Documents\GitHub\ccs-express-mongo\node_modules\mongoose\lib\query.js:3309:12) at model.Query.Query._castConditions (C:\Users\rutherfordc\Documents\GitHub\ccs-express-mongo\node_modules\mongoose\lib\query.js:1293:10) at model.Query.Query._findOne (C:\Users\rutherfordc\Documents\GitHub\ccs-express-mongo\node_modules\mongoose\lib\query.js:1518:8) at process.nextTick (C:\Users\rutherfordc\Documents\GitHub\ccs-express-mongo\node_modules\kareem\index.js:333:33) at _combinedTickCallback (internal/process/next_tick.js:131:7) at process._tickCallback (internal/process/next_tick.js:180:9)

我已经确认它实际上是泄漏到我的路由处理程序中的路由名称。 (即，我将 S&G 的路由更改为 /jerry，并且错误中的“list”被替换为“jerry”)

Answer 1

我认为问题出在你的find方法中尝试将其更改为这样

 router.get('/list', (req, res) => {
 Insider.find({}, {id:0}).then(insiders => {
  if (!insiders) {
   res.status(400).json({ error: 'unable to find list of insiders' });
   }
     res.json(insiders);
  }).catch(err => res.status(400).json(err));
});

我认为你应该使用 id 而不是 _id 并将其值设置为 0