(node:71307) [DEP0079] DeprecationWarning

Question

Try to update MongoDB document Getting Deprecation Warning as

(node:71307) [DEP0079] DeprecationWarning: Custom inspection function on Objects via

Answer 1

I want to add to this thread that it may also have to do with other dependencies.

For instance, nothing I updated or set for NodeJS, MongoDB or Mongoose were the issue - however - my problem was that connect-mongodb-session had been updated and starting slinging the same error. The solution, in this case, was to simply rollback the version of connect-mongodb-session from version 2.3.0 to 2.2.0.

Answer 2

You have to not worry about this error this is mongoose warning . Actually Mongoose use inspect() to debug output . they will update it may be before node 12.x . For now it is safe to use this.

Nothing to worry.

Check this info. https://nodejs.org/api/deprecations.html#deprecations_dep0079_custom_inspection_function_on_objects_via_inspect

DEP0079: Custom inspection function on Objects via .inspect()# Type: Runtime

Using a property named inspect on an object to specify a custom inspection function for util.inspect() is deprecated. Use util.inspect.custom instead. For backward compatibility with Node.js prior to version 6.4.0, both may be specified.

If you want more detail, see this . This is under progress. Warning will come in node 10

https://github.com/Automattic/mongoose/issues/6420

Answer 3

To solve this problem, You have to use useNewUrlParser and useCreateIndex. See the code below.

mongoose.connect(
 config.databaseUrl,
 { 
    useNewUrlParser: true, 
    useCreateIndex: true 
 }
)

Or

mongoose.set("useCreateIndex", true);    
mongoose.connect(
    config.databaseUrl,
    { 
        useNewUrlParser: true
    }
  );

Answer 4

In order to not get the deprecation message you can upgrade to mongoose version 5.2.10 or later according to this Github mongoose issue and the set the following at a proper location in code:

mongoose.set('useCreateIndex', true)

Answer 5

You should add the options useCreateIndex to your connect method

mongoose.connect(keys.mongoURI, {
    useNewUrlParser: true,
    useCreateIndex: true,
})

Answer 6

Another way to set it is...

mongoose.connect(
    "mongodb://<user>:<password>@<url>",
    { 
      useNewUrlParser: true, 
      useCreateIndex: true 
    }
  )

More information can be found here: https://github.com/Automattic/mongoose/issues/6890