this.host.fetchMoreData() not working on initial load

giammariam — Sun, 20 Feb 2022 16:48:58 GMT

I just wanted to share this in case anyone else runs into a similar issue. I am running powerbi-visuals-api v4.2.0. While implementing fetchMoreData() to pull in more than the default allowed 30,000 rows, I was running into an issue where upon initial load, nothing would appear. If I triggered an update (e.g. data filter), everything worked as expected. I could trigger multiple subsequent updates and the data and visual returned correctly, only the initial load was having an issue. After trying a bunch of different things, below is how I ended up solving it. The key ended up being to call refreshHostData() followed by update() on the initial load.

This thread was very helpful, especially the responses from jppp and dm-p

this._visualUpdateOptions = options; const dataView = options.dataViews[0]; const lastCall = (dataView.metadata.segment) ? false : true; if (this._initialLoad) { this._initialLoad = false; if (!lastCall) { this._visualUpdateOptions.dataViews[0].metadata.segment = true; this._host.refreshHostData(); this.update(this._visualUpdateOptions); } } if (!lastCall) { let moreData: boolean = this._host.fetchMoreData(); if ((moreData)) { this._initialLoad = false; this._segmentCounter += 1; return; } } console.log(`segments: ${this._segmentCounter} rows: ${options.dataViews[0].table.rows.length}`) this._segmentCounter = 1;

topic this.host.fetchMoreData() not working on initial load in Custom Visuals Development Discussion

this.host.fetchMoreData() not working on initial load