fix: Allow chart import to update the dataset an existing chart point…

…s to (apache#24821)

superset/charts/commands/importers/v1/utils.py

@@ -53,7 +53,9 @@ def import_chart(
     # migrate old viz types to new ones
     config = migrate_chart(config)
 
-    chart = Slice.import_from_dict(session, config, recursive=False)
+    chart = Slice.import_from_dict(
+        session, config, recursive=False, allow_reparenting=True
+    )
     if chart.id is None:
         session.flush()
 

superset/models/helpers.py

@@ -182,7 +182,7 @@ class ImportExportMixin:
     __mapper__: Mapper
 
     @classmethod
-    def _unique_constrains(cls) -> list[set[str]]:
+    def _unique_constraints(cls) -> list[set[str]]:
         """Get all (single column and multi column) unique constraints"""
         unique = [
             {c.name for c in u.columns}
@@ -244,6 +244,7 @@ def import_from_dict(
         parent: Optional[Any] = None,
         recursive: bool = True,
         sync: Optional[list[str]] = None,
+        allow_reparenting: bool = False,
     ) -> Any:
         """Import obj from a dictionary"""
         if sync is None:
@@ -256,7 +257,7 @@ def import_from_dict(
             | {"uuid"}
         )
         new_children = {c: dict_rep[c] for c in cls.export_children if c in dict_rep}
-        unique_constrains = cls._unique_constrains()
+        unique_constraints = cls._unique_constraints()
 
         filters = []  # Using these filters to check if obj already exists
 
@@ -275,8 +276,11 @@ def import_from_dict(
             for k, v in parent_refs.items():
                 dict_rep[k] = getattr(parent, v)
 
-        # Add filter for parent obj
-        filters.extend([getattr(cls, k) == dict_rep.get(k) for k in parent_refs.keys()])
+        if not allow_reparenting:
+            # Add filter for parent obj
+            filters.extend(
+                [getattr(cls, k) == dict_rep.get(k) for k in parent_refs.keys()]
+            )
 
         # Add filter for unique constraints
         ucs = [
@@ -287,7 +291,7 @@ def import_from_dict(
                     if dict_rep.get(k) is not None
                 ]
             )
-            for cs in unique_constrains
+            for cs in unique_constraints
         ]
         filters.append(or_(*ucs))