Pb importing data in a custom collection

[Robby Stephenson]

Hi José-Marcio,

Sorry it took me a little while to respond. I've been traveling.

On Mon, Dec 1, 2025 at 5:20 PM Marcelin Jose-Marcio Martins da Cruz
<jose.marcio.mc at gmail.com> wrote:
> I've created a custom collection, a collection of photographs (many
> thousands). I'm filling it thanks to .CSV data files.
>
> But, each time I add new photographs, I need two steps : the first one
> to create new entries with some fields and the second one to add other
> fields (EXIF data). Unfortunately, I can't do it in a single step.

I'll try to think through your process, see if I can improve something
to make that easier. The CSV import is is one of the more "bare bones"
imports, since there's little to no metadata coming along with the
values.

> So the first step must be adding entries (option : append to current
> collection) and the second one to update these new entries (option :
> merge to current collection). The first step works fine, but the second
> one does nothing.
>
> Maybe I'm doing something wrong. Is there a key field which must be
> present in both files ?

Each individual entry being imported is evaluated for merging by
comparing field values against other entries, together with some
weighting factors. For a custom collection, if there's a "title"
field, that's given double weight, any URL field is double, and every
other value has single weight. Then the total is compared against a
threshold for matching. As it is right now, an identical title plus
any kind of match on another field is enough to signal a possible
match. For a strong match, it needs 3-4 more field matches, depending
on the quality of the match.

If you want to email me directly with a sample collection file and
.csv, I can take a look for you.

Robby