Use JSON encoding for objects when writing zarr (#310)

Author: sjperkins

HISTORY.rst

@@ -4,6 +4,7 @@ History
 
 X.Y.Z (YYYY-MM-DD)
 ------------------
+* Use JSON codec for writing zarr strings (:pr:`310`)
 * Address warnings (:pr:`309`)
 
 0.2.20 (2024-01-30)

daskms/experimental/zarr/__init__.py

@@ -68,7 +68,7 @@ def zarr_chunks(column, dims, chunks):
 def create_array(ds_group, column, column_schema, schema_chunks, coordinate=False):
     import numcodecs
 
-    codec = numcodecs.Pickle() if column_schema.dtype == object else None
+    codec = numcodecs.JSON() if column_schema.dtype == object else None
 
     if column_schema.chunks is None:
         try: