White screen after inserting feature with id field hidden

[smaspons]

Hi!

So I have a layer (postgresql view) that has a few fields and they all are filled by a trigger in database. In the QGIS project I have all the fields set to hidden so I can insert features without inputing any fields (the trigger handles them).

I'm trying to do this in QWC2 via the Editing plugin and I have a few problems:

• I can insert features but when I commit the screen goes white and it gives me an error like Uncaught TypeError: id is null
• When I go to select a feature to update it, it detects a lot of the neighbouring features, not just the one I clicked. I don't know if it's intended or it's a bug or something I'm doing wrong, but it seems to me that the Editing plugin doesn't manage the zoom level properly.
• Also, if the id is hidden, the combobox with all the features that it found is full of empty strings, although they are properly managed as I can see the highlight on the map.
• If I try to update a feature (its geometry) it gives me the error ERROR: source for a multiple-column UPDATE item must be a sub-SELECT or ROW() expression, which I'm guessing is solved with the last commit.

Just so you know, I'm using the docker image: sourcepole/qwc-data-service:v2023.1-lts and the latest commit of qwc2 for the app.

Please, let me know if you need more details. Thanks!

[manisandro]

I can insert features but when I commit the screen goes white and it gives me an error like Uncaught TypeError: id is null

Can you post the full stack trace from the JS console (F12)? Make sure you are either running through a webpack dev server or a prod build with source-maps

When I go to select a feature to update it, it detects a lot of the neighbouring features, not just the one I clicked. I don't know if it's intended or it's a bug or something I'm doing wrong, but it seems to me that the Editing plugin doesn't manage the zoom level properly

Features are queried with a 10px tolerance, see https://github.com/qgis/qwc2/blob/master/utils/EditingInterface.js#L60

Also, if the id is hidden, the combobox with all the features that it found is full of empty strings, although they are properly managed as I can see the highlight on the map.

You should set the display field (QGIS -> layer properties -> display -> display name) to a non-hidden field

If I try to update a feature (its geometry) it gives me the error ERROR: source for a multiple-column UPDATE item must be a sub-SELECT or ROW() expression , which I'm guessing is solved with the last commit.

Please use the lastest qwc-data-service (v2023.10.12)

[smaspons]

Can you post the full stack trace from the JS console (F12)? Make sure you are either running through a webpack dev server or a prod build with source-maps

Yes! There are multiple errors, all of them occur when I commit the feature: console-export-2023-10-13_12-59-59.txt Btw, it inserts the feature correctly, the issue is after inserting it i guess...

Features are queried with a 10px tolerance

Hmm, I'll look more into it, because no matter where I click it finds all the features

[manisandro]

I take the id is null of the GeoJSON feature returned by the data service after insert?

[smaspons]

Yes, the id is null, but the geometry is correct I think

[manisandro]

My guess is that since you are using a view, and a view cannot have a primary key, the data-service won't be able to return an id for the feature (hence null) and hence everything else falls down as well.

In short, editing on views is currently unsupported.

[smaspons]

Okay, I understand. Well, I'll see what I can do to work around this.

Thanks anyway for the quick responses!

[tpo]

My guess is that since you are using a view, and a view cannot have a primary key, the data-service won't be able to return an id for the feature (hence null) and hence everything else falls down as well.

In short, editing on views is currently unsupported.

@mwa @HusseinKabbout - we have been recently discussing this AFAI remember. You might want to shortcircuit with @manisandro ... !

[cymed]

@smaspons As you are working on postgres, you might try defining a default value on the view

ALTER VIEW my_schema.vw_foobar
    ALTER COLUMN pseudo_pkey SET DEFAULT nextval('my_schema.pkey_seq'::regclass)