SyntaxError: invalid property id - MongoDB

问题

I am from an Oracle PLSQL background and I have just started learning MongoDB commands.

   >db.Employee.find()
   { "_id" : 10, "EmployeeName" : "Smith" }
   { "_id" : 20, "EmployeeName" : "Nandhi" }
   { "_id" : 30, "EmployeeName" : "Rajan" }
   { "_id" : 50, "EmployeeName" : "Raju" }

I need to query the documents like:

  WHERE EmployeeName = "Smith" OR (EmployeeName = "Rajan" AND _id = 30);

I have written the corresponding code as below:

  db.Employee.find({$or:[{"EmployeeName":"Smith",{"EmployeeName":"Rajan","_id":30}}]})

Error Message

2019-03-13T22:48:26.123+0530 E QUERY [js] SyntaxError: invalid property id @(shell):1:47

回答1:

Your $or terms need to be in separate objects:

db.Employee.find({$or:[{"EmployeeName":"Smith"}, {"EmployeeName":"Rajan", "_id":30}]})

回答2:

Braces are incorrectly enclosed. Use like this

  db.Employee.find({$or:[{"EmployeeName":"Smith"},{"EmployeeName":"Rajan","_id":30}]})

来源：https://stackoverflow.com/questions/55147865/syntaxerror-invalid-property-id-mongodb