undefined id error in main.js

[rohit13k]

main.js:990 Uncaught TypeError: Cannot read property '_id' of undefined
at updateMap (main.js:990)
at Object.success (main.js:614)
at c (jquery-1.9.1.min.js:3)
at Object.fireWith [as resolveWith] (jquery-1.9.1.min.js:3)
at k (jquery-1.9.1.min.js:5)
at XMLHttpRequest.r (jquery-1.9.1.min.js:5)

Getting this error in the index page.

[mirkomarras]

Hi Rohit,
I think that this error could be generated when the following events happen:

1. On the frontend, you select a data source to be visualized.
2. Then, you select a given time interval.
3. On the backend, if the DB does not include data for that data source in that time interval, the API returns an empty JSON object.
4. The frontend tries to access the "_id" property of an empty JSON object, so it generates an error.

[rohit13k]

@mirkomarras great thanks it will be easier for us to fix now 👍