更改 Ag-Grid 无限滚动块大小？

Question

Is there a way to change the block size when the row model used is "infinite" and a datasource is set?

Ie when the datasource's getRows() is called, is there a way to set startRow and/or endRow ? Default behaviour is to fetch 100 rows at a time which results in blank rows for me, since I only have about ~12 new data rows coming in at a time with infinite scroll. So, when getRows() is triggered, it'll try to fetch rows 100 to 200 (as an example) when there are only 45 data points in the first place. To compensate it adds a bunch of blank rows.

I've tried the following two additional grid options without success:

cacheOverflowSize: 2
infiniteInitialRowCount: 32

Fetching 100 rows at a time instead of 12 solves the issue, but I'd reeeeeally rather not do this (due to some design constraints of the product I'm working on).

Answer 1

Shoutout to @kamil-kubicki for their comment. cacheBlockSize was indeed what I was looking for. It didn't solve my whole problem though, so I'll outline my complete solution below.

I had ag-grid's row height set to the default 25px max. That meant that on load, when it was populating the initial data, it was coming close to rendering my entire initial data set of 32 items. On scroll, getRows() would then look for rows outside of the total data collection's bounds, so it added blank rows.

I changed how many data results are loaded on each scroll to 50. This is relatively large but it works and is performant for now, so I think I'll keep it.

For those with a similar problem:

1. Use cacheBlockSize in gridOptions

2. Make sure that your ag-grid isn't rendering anything close to your full initial data collection (eg if your collection is 32 items, don't render anything above like 16 items - control this by changing the height of your rows and the size of your grid)

3. Change how many data items are loaded in to your collection on scroll to a larger number; something that can populate data faster than the user can scroll. For me it was 50. For you it might be more, or less.