Getting error "Converting circular structure to JSON" while working with express,mongodb

Question

I'm trying to find tours within a specific distance.here is my code

exports.getTourWithin = catchAsync(async (req, res, next) => {
  const { distance, latlng, unit } = req.params;
  const [lat, lng] = latlng.split(',');
  if (!lat || !lng) {
    next(
      new AppError(
        `please provide latitude amd longitude in the form of lat,lng`,
        400
      )
    );
  }
  const radius = unit === 'mi' ? distance / 3963.2 : distance / 6378.1;

  const tours = Tour.find({
    $geoWithin: { $centerSphere: [[lng, lat], radius] }
  });
  res.status(200).json({
    status: 'success',
    data: {
      data: tours
    }
  });
});

but i'm getting this error in postman:

"message": "Converting circular structure to JSON\n    --> starting at object with constructor 'NativeTopology'\n    |     property 's' -> object with constructor 'Object'\n    |     property 'sessionPool' -> object with constructor 'ServerSessionPool'\n    --- property 'topology' closes the circle",
    "stack": "TypeError: Converting circular structure to JSON\n    --> starting at object with constructor 'NativeTopology'\n    |     property 's' -> object with constructor 'Object'\n    |     property 'sessionPool' -> object with constructor 'ServerSessionPool'\n    --- property 'topology' closes the circle\n    at JSON.stringify (<anonymous>)\n    at stringify (D:\\Node-Jonas\\Node-Rest-Api\\node_modules\\express\\lib\\response.js:1119:12)\n    at ServerResponse.json (D:\\Node-Jonas\\Node-Rest-Api\\node_modules\\express\\lib\\response.js:260:14)\n    at D:\\Node-Jonas\\Node-Rest-Api\\controllers\\tourControllers.js:190:19\n    at D:\\Node-Jonas\\Node-Rest-Api\\utilis\\catchAsync.js:3:5\n    at Layer.handle [as handle_request] (D:\\Node-Jonas\\Node-Rest-Api\\node_modules\\express\\lib\\router\\layer.js:95:5)\n    at next (D:\\Node-Jonas\\Node-Rest-Api\\node_modules\\express\\lib\\router\\route.js:137:13)\n    at Route.dispatch (D:\\Node-Jonas\\Node-Rest-Api\\node_modules\\express\\lib\\router\\route.js:112:3)\n    at Layer.handle [as handle_request] (D:\\Node-Jonas\\Node-Rest-Api\\node_modules\\express\\lib\\router\\layer.js:95:5)\n    at D:\\Node-Jonas\\Node-Rest-Api\\node_modules\\express\\lib\\router\\index.js:281:22\n    at param (D:\\Node-Jonas\\Node-Rest-Api\\node_modules\\express\\lib\\router\\index.js:354:14)\n    at param (D:\\Node-Jonas\\Node-Rest-Api\\node_modules\\express\\lib\\router\\index.js:365:14)\n    at param (D:\\Node-Jonas\\Node-Rest-Api\\node_modules\\express\\lib\\router\\index.js:365:14)\n    at param (D:\\Node-Jonas\\Node-Rest-Api\\node_modules\\express\\lib\\router\\index.js:365:14)\n    at Function.process_params (D:\\Node-Jonas\\Node-Rest-Api\\node_modules\\express\\lib\\router\\index.js:410:3)\n    at next (D:\\Node-Jonas\\Node-Rest-Api\\node_modules\\express\\lib\\router\\index.js:275:10)"
}

how i can solve this issue?Thanks

duncanlarge · Accepted Answer · 2020-09-25 20:04:36Z

30

I came across this exact error. You need to add "await" to your call to the Tours model as you're using async/await. You also need to include the field name you're querying on per @Anatoly's point:

const tours = await Tour.find({
    yourfieldname: {
        $geoWithin: { $centerSphere: [[lng, lat], radius] }
    }
});

answered Sep 25, 2020 at 20:04

duncanlarge

3162 silver badges2 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Gursidak Singh · Accepted Answer · 2022-04-16 18:01:31Z

4

In my case, I forget to put await in front of find() operation of mongo in a controller . It worked for me after adding await in that statement So it returned promise instead of desired results

for good understanding, read it once https://www.geeksforgeeks.org/mongodb-db-collection-find-method/

edited Apr 16, 2022 at 18:01

answered Apr 4, 2022 at 6:11

Gursidak Singh

413 bronze badges

1 Comment

Community Over a year ago

Your answer could be improved with additional supporting information. Please edit to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers in the help center.

Tyler2P · Accepted Answer · 2023-07-08 13:50:59Z

3

You just need to add await before the find() function.

edited Jul 8, 2023 at 13:50

Tyler2P

2,37030 gold badges26 silver badges34 bronze badges

answered Jul 5, 2023 at 6:59

Code Decor

312 bronze badges

Comments

Anatoly · Accepted Answer · 2020-09-20 15:49:55Z

2

In tours you got a cursor not the data themselves. You should call toArray to retrieve the data.

const tours = Tour.find({
    $geoWithin: { $centerSphere: [[lng, lat], radius] }
  });
res.status(200).json({
    status: 'success',
    data: {
      data: tours.toArray()
    }
  });

answered Sep 20, 2020 at 15:49

Anatoly

23.2k3 gold badges33 silver badges46 bronze badges

5 Comments

JsStudent Over a year ago

Thanks for your reply but after trying your code it's said ""message": "tours.toArray is not a function","

Anatoly Over a year ago

Hmm. Can you look at tours content by setting a breakpoint at res.status line?

JsStudent Over a year ago

i missed to use await before Tour.find({ $geoWithin: { $centerSphere: [[lng, lat], radius] } }); after using await now i'm getting different error message ""message": "unknown top level operator: $geoWithin","

Anatoly Over a year ago

You didn't indicate a field before $geoWithin operator

JsStudent Over a year ago

Thanks Anatoly.i already fixed that but really thanks for your times and concerns.

Sohaib ahmad · Accepted Answer · 2023-02-23 14:26:01Z

1

I missing await in the async function by adding await this finding the search id

answered Feb 23, 2023 at 14:26

Sohaib ahmad

413 bronze badges

1 Comment

Quad Over a year ago

This is same as the previous answers, and an answer to a question with an already accepted answer. Please check other answers before answering a question.

Tyler2P · Accepted Answer · 2022-05-06 19:50:46Z

0

Since you are using Async so you have to add await in Find() function. In my case, the same error was occurred and solved by await.

edited May 6, 2022 at 19:50

Tyler2P

2,37030 gold badges26 silver badges34 bronze badges

answered May 5, 2022 at 13:19

Sam J

1

Comments

starterProgrammer · Accepted Answer · 2023-05-20 07:13:35Z

0

For me I missing await in the async function

// Delete Data 
 app.delete('/todos/delete/:id', async (req, res) => {
    const result =Todo.findByIdAndDelete(req.params.id)
    res.json(result)
 })

Fixed By Add await then it worked fine

// Delete Data 
app.delete('/todos/delete/:id', async (req, res) => {
   const result = await Todo.findByIdAndDelete(req.params.id)
   res.json(result)
})

answered May 20, 2023 at 7:13

starterProgrammer

3083 silver badges16 bronze badges

Comments

ankushlokhande · Accepted Answer · 2023-06-04 16:13:00Z

0

tour.find will be executed asynchronously so we should handle the requests by then and catch.

edited Jun 4, 2023 at 16:13

ankushlokhande

2,02813 silver badges35 bronze badges

answered Jun 3, 2023 at 10:32

heisenberg

134 bronze badges

3 Comments

ankushlokhande Over a year ago

As it’s currently written, your answer is unclear. Please edit to add additional details that will help others understand how this addresses the question asked. You can find more information on how to write good answers in the help center.

pierpy Over a year ago

Hi, in the accepted answer there is await Tour.find. It perfectly handles async code

heisenberg Over a year ago

yes, as the compilation stops until the query gets compiled it works perfectly

Shaxboz · Accepted Answer · 2022-11-08 15:26:01Z

-1

You may miss "await" keyword.

answered Nov 8, 2022 at 15:26

Shaxboz

194 bronze badges

1 Comment

Eric Aya Over a year ago

This is the same solution as in this other answer.

Collectives™ on Stack Overflow

Getting error "Converting circular structure to JSON" while working with express,mongodb

9 Answers 9

Comments

1 Comment

Comments

5 Comments

1 Comment

Comments

Comments

3 Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

9 Answers 9

Comments

1 Comment

Comments

5 Comments

1 Comment

Comments

Comments

3 Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related