Retrieve objects in folders

Plone Support Customizing Plone
1

Hi!
To retrieve the objects (just a few images, in average less than 6) in folders, what is the best/recommended approach:

  1. items() (does not look at the catalog??)
    or
  2. getFolderContents() (looks at the catalog, so maybe more overhead?)
2

If it's just a few images and you're going to need to load the full image objects anyway to render your page, I would definitely use items() (or values()) rather than a catalog query.

3

Given you have all Dexterity:
If its just a few and no other content objects are in the folder: use direct iteration on the containing folder.
if there are "more" (say >50-100) other objects to wake up in order to get the six use the catalog, maybe together with the generic functionality of plone.app.contentlisting.

4

Just be aware that you're not filtering on security with direct iteration.

5

Thanks for your answers.
I will go for items() (or values()).

@gyst
When you say security, you mean permissions, right?

6

@JotaMG I just fixed a bug in a project where using direct iteration raised UnAuthorized errors. The fix for that was to avoid iteration and do a catalog query on the path of the parent. The upside of the catalog query is, that it filters on 'allowed roles and users', so it results in a list that takes into account the permissions of the user requesting the listing view.

7

you can use listFolderContents which is aware of filtering and security; see:

I think it works also on Dexterity-based containers.

1 Like
8

Yes, it works, and if there are no more sugestions it will go into my addon, and I will close the case :wink:
Many thanks to you all for the help!