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MongoDB: db.getLastError() method

db.getLastError

The db.getLastError() method is used to check and return the status of the last operation.

Syntax:

db.getLastError(>w>, >wtimeout>)

Parameters:

Name Description Required /
Optional		 Type
w The write concern’s w value. Optional int or string
wtimeout The time limit in milliseconds. Optional int

Example: MongoDB: db.getLastError() method

The following example will display the error information on the previous write operation.

db.getLastError(2);

Output:

> db.getLastError(2);
2016-01-13T13:09:04.997+0530 getlasterror failed: {
        "connectionId" : 1,
        "n" : 0,
        "badGLE" : {
                "getlasterror" : 1,
                "w" : 2
        },
        "ok" : 0,
        "errmsg" : "cannot use 'w' > 1 when a host is not replicated",
        "code" : 2
} at src/mongo/shell/db.js:533

Retrieve the restaurants data from here

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