Format field pubdate

[Jacko4237]

Hello,
For send the books on my Kobo reader, I would like format the title in this form :
{pubdate}_{Title}
For Example : 2024-04_Title

This my formule :
format_date_field(raw_field('pubdate'),'yyyy-MM')_{title}

But the field 'pubdate' is not change in yyy-MM

Can you help me.

Thanks you

[Jacko4237]

I progress but not done.

With this model :
{pubdate:format_date(raw_field('pubdate'),'yyyy-MMM')}_{title}

I obtain : BAD DATE_Title

In Parameter Behavior, I have this value :
gui_pubdate_display_format = 'MMM yyyy'

Best regards

[Jacko4237]

I found the solution in the Bug #1246882 of 2013-10-31.

The terminal model of conversion is :
{:'format_date(raw_field('pubdate'),'yyyy-MM')'}

Thanks to myself.

And I hope this post will be useful to you

Best regards