Using QGIS project saved in Postgres as project file for QGIS server - postgresql

Question

I am trying to set up a Qgis server on debian that uses a Qgis project file stored in a Postgres db.
To get started I followed the official Qgis Training Module Lesson 12.1.
When using a project file stored locally on the server, it works fine.
Now I tried to change the "default qgis project" in the qgis.demo.conf file and indicate my project file stored in the postgres database according to this template : postgresql://localhost:5432?sslmode=disable&dbname=mydb&schema=myschema&project=myproject which I found in the QGIS User Guide.
My edited line in the qgis.demo.conf looks like this:
SetEnv QGIS_PROJECT_FILE postgresql://localhost:5432?sslmode=disable&dbname=Test&schema=public&project=world
When doing a GetCapabilities request I now get:
"WMS configuration error" There was an error reading the project file or the SLD configuration.
I looked in the qgis.server.log to understand what is going wrong.
"Error, configuration file 'postgresql://localhost:5432?(...)' does not exist"
I am able to access the stored project file with qgis and with pgadmin 4 I can see that it is stored in the database.
Do I indicate the project file wrong?

Answer 1

you should complete the connectionstring with user and password
SetEnv QGIS_PROJECT_FILE postgresql://user:password#localhost:5432?sslmode=disable&dbname=Test&schema=public&project=world