Error: attempt to apply non-function

[mansi2504]

I am running this basic function using Mongolite and a plumber script and this just doesn't seem to work:

training_status <- training_status$find(query = '{"TrainingStatus" : "running"}')

It is giving me the following error repeatedly:
Error: attempt to apply non-function

I don't understand the reason behind this. All other functions seem to be working fine. Why does this error occur anyway?

[technocrat]

The key to tracking this down is to look for (, which is a giveaway that a function is getting ready to take its argument. So, just look left and see

training_status$find

which is pretty sure to be a column in a data frame, rather than a function.

[mansi2504]

I actually was able to trace my error somewhat.

Earlier, I had:
training_status <- training_status$find(query = '{"TrainingStatus" : "running"}')

I made the variable 'training_status' with the same name as the connection object of the MongoDB server. So I ran my plumber script, it didn't find training_status$find
I changed the variable name in plumber script to say, status and it worked then.

Thanks for your help, though!

[technocrat]

There might be a better way of handling off to mongo than a string disguised as an R function