topic Re: Link selections on a mashup with several apps in Integration, Extension & APIs

Link selections on a mashup with several apps

martinien — Fri, 26 Jan 2018 21:14:58 GMT

Hi qlik devs!

I want to build a mashup with several apps. These apps have some common fields used as dimension (Country, Product family....).

I want selections made on these fields to be applied to all the apps used by the mashup.

Has anyone done this kind of things?

I guess it can be done using

app.getList("CurrentSelections", .....

To listen to selection change, and then applying these to all apps. Probably using some buffer to store last state and trigger selections on change in order to avoid infinite loops.

I'd be glad to have some thoughts and feedback on this.

Martin

Re: Link selections on a mashup with several apps

Anonymous — Sat, 27 Jan 2018 10:10:35 GMT

What you are suggesting sounds viable, although I have never tried it.

What I generally do for a mashup is a create dedicated qvf app for it. So maybe you could create a single qvf app that contains the data your mashup needs, as opposed to trying to sync several qvf data source apps. This may sound a bit of a palaver but I reckon would be quicker to do and end up with a more efficient and reliable mashup.

Re: Link selections on a mashup with several apps

ErikWetterberg — Sat, 27 Jan 2018 13:14:29 GMT

Hi Martin,

I have done some work on this. Some recommendations:

- use one app as a master app, where the user makes selections in the common fields

- listen to the selections with List objects, created with createList

- propagate the selections to the other apps with field.select

Hope you find this helpful

Erik Wetterberg

Re: Link selections on a mashup with several apps

martinien — Fri, 02 Feb 2018 13:24:41 GMT

Hi,

Thanks again for the tips!

Using the createList method was clearly a better idea than dealing with the whole CurrentSelections object.

In the end I only had to propagate selections on a defined user action so I used createList to get selections, field.select to apply them and destroyed the list object in the end.

Martin

Re: Link selections on a mashup with several apps

srik00001 — Fri, 17 Jan 2020 14:25:52 GMT

Hi Martin/Erik,

Can you share the code of how you achieved this? I am new to coding and trying to build process that applies the selections from one mashup to another.

Thanks,

Sri