Setting default compressor for v2 arrays sets filters

[jhamman]

Zarr version

3.0.0b4.dev7+g122760fc.d20241213

Numcodecs version

v0.14

Python Version

3.11

Operating System

Mac

Installation

hatch

Description

Setting the v2_default_compressor to blosc results in the filters attribute being set, not the compressor attribute.

Steps to reproduce

with zarr.config.set({'array.v2_default_compressor.numeric': 'blosc'}):
    z = zarr.zeros(100000000, chunks=1000000, zarr_format=2)

z.metadata.filters
# (Blosc(cname='lz4', clevel=5, shuffle=SHUFFLE, blocksize=0),)

z.metadata.compressor
# None

Additional output

No response