Value Relation Widget

[signedav]

Value Relation like Relation Reference.

• lists the referenced fields and stores the value
• Allow Null and OrderBy
• Multi value
• keep index in list (on checking don't jump to start)
• clean up model on add Feature
• JSON implementation
• fix that display value sometimes not displayed

Then we do the TESTS

(Dave your project is qfield_valuerelation_test)

• tested with string on GPKG
• tested with string on GPKG using UUIDs
• tested with string on PG
• tested with string on PG using UUIDs
• tested on device
• tested with json on GPKG (needing device)
• tested with json on PG (needing QGIS fix = vs {})

Optional:

• Issue with UUIDs ({} as values in hstore list)
• Fix issue on QGIS storing stringts in {}

Looks like this

[qfield-fairy]

Uploaded test apks for armv7 and x86 (Android 5: armv7 and x86)

[m-kuhn]

Looking good 👍

[qfield-fairy]

Uploaded test apks for armv7 and x86 (Android 5: armv7 and x86)

[qfield-fairy]

Uploaded test apks for armv7 and x86 (Android 5: armv7 and x86)

[qfield-fairy]

Uploaded test apks for armv7 and x86 (Android 5: armv7 and x86)

[qfield-fairy]

Uploaded test apks for armv7 and x86 (Android 5: armv7 and x86)

[qfield-fairy]

Uploaded test apks for armv7 and x86 (Android 5: armv7 and x86)

[qfield-fairy]

Uploaded test apks for armv7 and x86 (Android 5: armv7 and x86)

[qfield-fairy]

Uploaded test apks for armv7 and x86 (Android 5: armv7 and x86)

[m-kuhn]

Good job so far @signedav

There is still one open issue with this, it's not working with Android 5 builds because Android 5 QGIS builds are too old.

I think before merging / releasing we need to announce this. There will be more changes like this coming at some point, it's inevitable. So if people want Android 5 support to continue, we will need to fix those builds, but we are only able to invest if this project is properly funded.

[signedav]

There is an open Pull Request on QGIS, where utility functions would be available, we can use to convert the lists to formatted strings. Should be merged soon. Probably this week :-)

[jhonalex06]

Hi, I have a question

i try to use the filter expression, but it didn't work, is possible implement the filter expression?

Thanks

[m-kuhn]

@signedav the new SDK should include the required methods for (de)serializing pg arrays

[Emic37]

Hi @signedav !
Have you planned to support the completer ?

[signedav]

@Emic37 Would be nice. But not in this implementation, sorry.

[Emic37]

@signedav Oh so disappointed! xD is it a big job to add this functionality ?

[m-kuhn]

@Emic37 No, it's certainly not trivial.

[qfield-fairy]

Uploaded test apks for armv7 and x86 (Android 5: armv7 and x86)

[signedav]

The unsuccessful tests storing data to JSON fields in Geopackage and Postgres, should not have influences on this widget implementation. Because the part, that the widget does, works fine.

So in my opinion this is okay.

[qfield-fairy]

Uploaded test apks for armv7 and x86 (Android 5: armv7 and x86)

[Emic37]

@m-kuhn Ok. Thanks for reply.