Lightroom Classic: Rename exported file with catalog name

The general consensus is that it is best to work with a single catalog. That is why I doubt that this suggestion will be put high on the priority list.

I doubt that professional photographers would use a single catalog, when you have hundreds of thousands of raw files it gets very hard to manage and if the catalog crashes it's very risky. Ideally I would like to use a single catalog, but none of the photographers I know does it, and for a reason.

How many catalogs do you have?  You could just create an Export Preset for each Catalog and Pick that one out when you export from that catalog.  As Johan said, I doubt Adobe will spend valuable development time on this request so you might as well develop a workaround.  

That could be a solution, but I have one catalog for each commission so quite a lot. How would this workaround work?

You just create a preset for each catalog using your screen clipped export File Rename template and change the Custom Text for each one.  If you have more than 20 catalogs it would probably be unwieldy but that is one of the many issues that pop up when using multiple catalogs.

Plenty of users who make their living from photography use a single catalogue to manage all their work and have proper backups to eliminate the risk. The job field is ideal for identifying commissions and is available in filters, smart collections, and in export's renaming template.

To add on what John said: When you import the images into a new catalog, add the catalog name to some metadata field that you are not using right now, and that can be selected in the file renaming options on export. You can do this by applying a metadata preset on import. There are plenty fields, so there should be one you're not using. The job field could be the one.

Then create an export preset where that field is used for renaming the exported image. Just like you would select the catalog name if that was an option.

This makes sense and is very useful, thank you!

Going back to the organisation issue, I shoot mainly interiors and architecture. The trouble comes when I have to organise the images within a job because I need to separate i.e. Details/Interiors/Exteriors/Aerial/etc. and I found that the best way is to create collections so that I can manually rearrange even the order of single images when exporting in a contact sheet for the client.
If I had to do this on a single catalog it would be a huge quantity of collections and hard to handle. Any advice for this?

Right, ok, now you guys are responsible for all the work I'll need to do to go back to a single catalog structure. Shame on you! Just kidding ; )

Right, ok, now you guys are responsible for all the work I'll need to do to go back to a single catalog structure. Shame on you! Just kidding ; )

So, before doing the whole merging I was trying to set up a trial collection structure that allows me to make the most out of the catalog, but I'm facing a couple of difficulties that make me think it's not really worth it:

1. The folder structure of the smart catalogs seems to be not duplicable as a whole, do I need to duplicate the folders one by one every time I create a new job? This seems quite absurd and I hope I'm doing something wrong – again.

2. One of the main filters I'm using is the Title that corresponds to the job name, and applies to all the smart collections to pick the right files from the catalog. Having 14 smart collections in the structure I worry that this means having to manually change the rule in all the 14 folders every time I create a new job.

3. One of the good things of the normal collections was the chance to manually reorder the images to give them a logical sense. With smart collections this seems not possible, but if I don't use them I lose the whole purpose of using accurate metadata.

I feel like I'm using the wrong tools for the job. Any idea of how to structure the database to achieve this kind of organisation?

Thank you for the patience and support