ExternalError: TypeError: Cannot read property 'reduce' of undefined

[asarenicholls]

Hi,

I’m working on an app that allows users to add items to a row using the multirow column function and have it working to a certain extent but I’m having 2 issues:

1. Whenever I add or remove a multirow column item I get the error “ExternalError: TypeError: Cannot read property ‘reduce’ of undefined”. Does anybody know how I can fix this?
2. Loading the datagrids in the app can take upwards of 8 seconds despite only loading 5 rows at a time. Is there a way to reduce this time?

Link to the app is below. Any help is much appreciated.
https://anvil.works/build#clone:A47OFUH6744MFGJM=HX4X2MSC2X3KPMI22D6NTWUN

[campopianoa]

@asarenicholls

Loading the datagrids in the app can take upwards of 8 seconds despite only loading 5 rows at a time. Is there a way to reduce this time?

If the components are connected to live DataTable rows, this will make many round trips to the server and thus be slow. In case it helps, here are several posts that have suggestions for improving performance:

Suggestions to optimize performance

Very likely these two posts describes what you need: Here are other posts that talk about client-server communication optimization. EDIT @shaun and @bridget, I listed only my posts because those are the ones I know, but it would be nice to have a few posts organized by topic (performance, data tables, DataGrid, javascript, custom components, etc.) listing the best posts about each topic. These should be maintained as Anvil grows and they get stale.

[asarenicholls]

Thanks @alcampopiano, I’ll have a look. Does anyone have an idea what the TypeError is being caused by?