FYI: Pydantic v2 is breaking things

[effigies]

Just a heads up that we're getting failures in PyBIDS on our pre-release tests due to a dependency using pydantic. A quick glance didn't indicate that you're testing pre-releases, so I wanted to make sure you weren't caught off-guard when the full release comes out.

• https://docs.pydantic.dev/blog/pydantic-v2
• https://github.com/pydantic/pydantic/releases

[yarikoptic]

Thank you @effigies for the heads up! I guess, while addressing incompatibility, we better add a dev run on CI here to also be able to be proactive. @jwodder -- please look into adding such a CI run and possibly fixing up any issue which might be arising? If no issues, I guess we would better still keep the upper bound before 2.0 you added in #177 until 2.0 is actually released, whenever we could boost it to < 3.0.

[yarikoptic]

ok, @candleindark let's look into just migrating over to use pydantic 2.0 -- first approach here, and then see what it would take in the projects which use dandischema (see #178 (comment))

[candleindark]

ok, @candleindark let's look into just migrating over to use pydantic 2.0 -- first approach here, and then see what it would take in the projects which use dandischema (see #178 (comment))

Do you mean migrating to Pydantic 2.0 for real now, without the support for Pydantic 1.0? Do you also mean to abandon the approach in #178? That approach supports Pydanic 1.0 by importing it though pydantic.v1 when Pydantic 2.0 is installed in the Python environment. It doesn't actually use Pydantic 2.0.

[satra]

Do you mean migrating to Pydantic 2.0 for real now, without the support for Pydantic 1.0?

yup! no backwards compatibility wanted at this time.

[candleindark]

Do you mean migrating to Pydantic 2.0 for real now, without the support for Pydantic 1.0?

yup! no backwards compatibility wanted at this time.

Great. That would be cleaner.

[yarikoptic]

reconfirming -- full migration to v2 without using a shim

[oruebel]

FYI, this has come up as an issue here NeurodataWithoutBorders/pynwb#1799