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Directory portal request using typed uuids instead of uuids strings

I am writing a Plone calendar module to reserve different resources. This module contains a calendar whose events are stored in Postgresql. Each calendar is a Dexterity object stored in ZODB.

To establish a connection between Plone and Postgresql, I naturally turned to the uuid property of Plone objects. Thus, each uuid in Plone acts as a foreign key in Postgresql, which supports uuid natively.

This worked well for me in the last 6 months, until I started using Plone 4.1.4. It introduced plone.uuid 1.0.2, which changes the string representation of uuids from uuids to uuids without dashes.

The problem with this change is that I can no longer be sure which representation will be used on any given object. Objects created before Plone 4.1.4 contain a formatted uuid string differently than objects created after.

In short, to make sure my code works with any uuid view, I would love to be able to search using the uuid type of Python.

So instead:

catalog.searchResults(UID='325dc47e-08f9-4fa1-bc18-3944a725adb4')

Which returns different results than this:

catalog.searchResults(UID='325dc47e08f94fa1bc183944a725adb4')

I would like to do this:

from uuid import UUID
catalog.searchResults(UID=UUID('325dc47e-08f9-4fa1-bc18-3944a725adb4'))

Which would be equivalent to this:

catalog.searchResults(UID=UUID('325dc47e08f94fa1bc183944a725adb4'))

Does anyone know how I can achieve such independence from representing uuid in Plone?

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1 answer

You will need to request both formats; once a UID field has been assigned, it shall not be changed. So your options are:

  • , UID, , , :

    def queryUID(UID):
    if '-' in UID:
        return (UID.replace('-', ''), UID)
    return (UID, '-'.join([
        UID[:8], UID[8:12], UID[12:16], UID[16:20], UID[20:]]))

    :

    catalog.searchResults(UID=queryUID('325dc47e-08f9-4fa1-bc18-3944a725adb4'))

  • , Plone UID , - , Plone UID . , UID .

    UID Plone , . UID , .

  • ZODB UID . , , , UID .

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