Handle null array scalars in row.

Author: coady

graphique/interface.py

@@ -97,10 +97,9 @@ def row(self, info: Info, index: int = 0) -> dict:
         table = self.table.select(*names)[index:][:1].cache()
         row = {}
         for name in table.columns:
-            if isinstance(table[name], ibis.expr.types.ArrayColumn):
-                row[name] = Column.cast(table[name].first().unnest())
-            else:
-                (row[name],) = table[name].to_list()
+            (row[name],) = table[name].to_list()
+            if isinstance(row[name], list):
+                row[name] = Column.cast(table[name].unnest())
         return row
 
     def filter(self, info: Info, where: Expression | None = None, **queries: Filter) -> Self:

tests/test_models.py

@@ -134,8 +134,8 @@ def test_array(executor):
     assert data == {"columns": {"array": {"count": 1, "type": "array<int32>"}}}
     data = executor("{ row { array { ... on IntColumn { values } } } }")
     assert data == {"row": {"array": {"values": [0, 1, 2]}}}
-    data = executor("{ row(index: -1) { array { ... on IntColumn { values } } } }")
-    assert data == {"row": {"array": {"values": []}}}
+    data = executor("{ row(index: -1) { array { type } } }")
+    assert data == {"row": {"array": None}}
 
     data = executor("""{ project(columns: {array: {index: [{name: "array"}, {value: 1}]}, alias: "list"}) {
         column(name: "list") { ... on BigIntColumn { values } } } }""")