Display content wrong filter for relational value fields with multiple selection

[arno974]

What is the bug?

There is an error when copying the QGIS form configuration to automatically generate the tooltip content in Lizmap for fields of type "relational value" when the "multiple selection" option is enabled.

The filter parameter of the aggregate function automatically generated only considers a single selection [1] and not multiple selections [2]. As a result, the field with the multiple selection does not display any values in Lizmap web.

[1] Content automatically generated by Lizmap

aggregate(
		layer:='my_relational_layer',
		aggregate:='concatenate',
		expression:=to_string("field"),
		filter:="field" = attribute(@parent, 'parent_field')
	)

[2] Content that should be generated by Lizmap to take into account the multiple option value

aggregate(
			layer:='my_relational_layer',
			aggregate:='concatenate',
			expression:="description",
			concatenator:=', ',
			order_by:="description",
			filter:= array_contains(string_to_array(
				replace(
					regexp_replace(
						attribute(@parent, 'parent_field') , '[{"}]', ''
					),
					',', ' '
				),
				' '
			)
			,"field"
		)

Versions, safeguards, checks summary etc

Versions :

• Lizmap Web Client : 3.8.4-pre.8065 - commit 02c2d8242 3liz/lizmap-web-client@02c2d8242
• Lizmap plugin : 4.4.6
• QGIS Desktop : 3.34.4
• Lizmap.com : Yes
• QGIS Server : 3.34.11
• Py-QGIS-Server : 1.9.2
• QGIS Server plugin atlasprint : 3.4.1
• QGIS Server plugin cadastre : 1.20.0
• QGIS Server plugin lizmap_server : 2.11.2
• QGIS Server plugin wfsOutputExtension : 1.8.2

List of Lizmap Web Client modules :

* saas : 1.7.6 * cadastre : 2.1.4 * webdav : 1.2.0

List of safeguards :

* Mode : normal
* Allow parent folder : no
* Prevent other drive : yes
* Prevent PG service : yes
* Prevent PG Auth DB : yes
* Force PG user&pass : yes
* Prevent ECW : yes

Check Lizmap plugin

• I have done the step just before in the Lizmap QGIS desktop plugin before opening this ticket. Otherwise, my ticket is not considered valid and might get closed.