Fix XArray LCS join

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Release Notes
 
+## 0.6.5 (unreleased)
+
+### Dependencies
+
+- require XArray >= 2022.9.0, as `LocalCoordinateSystem` now handles merges correctly \[{pull}`861`\].
+
 ## 0.6.4 (09.02.2023)
 
 Version `0.6.4` is a small maintenance release with no changes affecting user code.

pyproject.toml

@@ -38,7 +38,7 @@ dependencies = [
     "numpy >=1.20",
     "asdf >=2.8.2,!=2.14.0,!=2.14.1,!=2.14.2",
     "pandas >=1.0",
-    "xarray >=0.19,<2022.09.0",
+    "xarray >=2022.9.0",
     "scipy >=1.4,!=1.6.0,!=1.6.1",
     "sympy >=1.6",
     "pint >=0.18",

weldx/util/xarray.py

@@ -737,10 +737,14 @@ def xr_interp_coordinates_in_time(
         return da
 
     times = Time(times).as_pandas_index()
+    time_ref = da.weldx.time_ref
     da = da.weldx.time_ref_unset()
     da = xr_interp_like(
         da, {"time": times}, assume_sorted=True, broadcast_missing=False, fillna=True
     )
+    # resync and reset to correct format
+    if time_ref:
+        da.weldx.time_ref = time_ref
     da = da.weldx.time_ref_restore()
 
     if len(da.time) == 1:  # remove "time dimension" for static cases