App search based on mime type returns nothing

[Michel-Ekimia]

When trying to open a file which has no apps associated in nautilus like a .epub

You have the button " look for compatible apps" which is great

however , gnome-software returns no apps for "application/epub+zip" mime type althou calibre and others can handle them

is this a problem with appsstream ?

I think THIS IS a very important feature ..

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: gnome-software 41.5-2ubuntu2
ProcVersionSignature: Ubuntu 5.15.0-48.54-generic 5.15.53
Uname: Linux 5.15.0-48-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Wed Oct 5 16:34:08 2022
InstalledPlugins:
 gnome-software-plugin-flatpak 41.5-2ubuntu2
 gnome-software-plugin-snap 41.5-2ubuntu2
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-software
UpgradeStatus: No upgrade log present (probably fresh install)

[Matthias Klumpp (ximion)]

You can verify whether this is an issue with GNOME Software or your metadata by opening a terminal and running this command:
appstreamcli what-provides mediatype application/epub+zip

If that yields results, it means that you have the metadata but GNOME Software doesn't read ir properly for some reason.