mikebridge commented on code in PR #44270:
URL: https://github.com/apache/superset/pull/44270#discussion_r4041219273
##########
superset/mcp_service/semantic_layer/tool/get_table.py:
##########
@@ -180,8 +194,52 @@ def _resolve_external_view(
error_type="ValidationError",
)
+ duration: str | None
+ valid_grains: dict[str, str] = {
+ duration: grain["name"]
+ for grain in view.get_time_grains()
+ if (duration := grain["duration"]) is not None
+ }
+ grain_column: str | None = request.time_column
+ if request.time_grain:
+ selected: list[str] = sorted(set(request.dimensions) &
valid_dttm_columns)
+ if grain_column is None:
+ if len(selected) != 1:
+ return SemanticLayerError.create(
+ error=f"time_grain on view '{display_name}' requires one
temporal "
+ f"dimension; selected: {selected}. Set time_column
explicitly.",
+ error_type="ValidationError",
+ )
+ grain_column = selected[0]
+ # The mapper chooses variants by dimension name, not the view-wide
union.
+ valid_grains = {
+ dimension.grain.representation: dimension.grain.name
+ for dimension in view.implementation.get_dimensions()
+ if dimension.name == grain_column and dimension.grain is not None
+ }
+ if request.time_grain not in valid_grains:
+ choices: str = ", ".join(
+ f"{duration} ({name})"
+ for duration, name in sorted(valid_grains.items())
+ )
Review Comment:
addressed in 56ba2b91c0ec05f94f9c3707bef06384030fbb5e
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