I’m working on a like/dislike system on an API that works with mongoDB and nodejs and the user is supposed to be able to perform these actions:
- Like the sauce once ( like = 1) and add the user id in a “usersLiked” array
- Cancel his like ( like = 0) and remove the user id from the “usersLiked” array
- Dislike the sauce once (like = -1) and add the user id in an array “usersDisliked”
- Cancel his dislike (like = 0) and supposedly removed the user id from the “usersDisliked” array
The logic of the system like / dislike
I managed to make the user like the sauce, cancel his like and dislike the sauce.
But I am completely blocked on the dislike cancellation because when I try to use again the updateOne method in the condition where we have to cancel the like / dislike I have this error:
Cannot set headers after they are sent to the client
How could Improve the code ?
I’m learning little by little to use the backend commands and here I’m facing a wall.