fix(exports): convert bool values for SAV exports

Author: ukanga

onadata/libs/tests/utils/test_export_builder.py

@@ -727,6 +727,37 @@ def test_zipped_sav_export_with_date_field(self):
 
         shutil.rmtree(temp_dir)
 
+    def test_zipped_sav_export_with_bool_string_value(self):
+        """Boolean values in string fields are exported as strings."""
+        md = """
+        | survey |
+        |        | type              | name         | label        |
+        |        | text              | active       | Active       |
+
+        | choices |
+        |         | list name | name   | label  |
+        """
+        survey = self.md_to_pyxform_survey(md, {"name": "exp"})
+        data = [{"active": True}]
+        export_builder = ExportBuilder()
+        export_builder.set_survey(survey)
+        with NamedTemporaryFile(suffix=".zip") as temp_zip_file:
+            export_builder.to_zipped_sav(temp_zip_file.name, data)
+            temp_zip_file.seek(0)
+            temp_dir = tempfile.mkdtemp()
+            with zipfile.ZipFile(temp_zip_file.name, "r") as zip_file:
+                zip_file.extractall(temp_dir)
+
+        self.assertTrue(os.path.exists(os.path.join(temp_dir, "exp.sav")))
+
+        with SavReader(os.path.join(temp_dir, "exp.sav"), returnHeader=True) as reader:
+            rows = list(reader)
+            self.assertTrue(len(rows) > 1)
+            self.assertEqual(_str_if_bytes(rows[0][0]), "active")
+            self.assertEqual(_str_if_bytes(rows[1][0]), "True")
+
+        shutil.rmtree(temp_dir)
+
     # pylint: disable=invalid-name
     def test_zipped_sav_export_dynamic_select_multiple(self):
         md = """

onadata/libs/utils/export_builder.py

@@ -1440,9 +1440,16 @@ def to_zipped_sav(self, path, data, *args, **kwargs):
         def write_row(row, sav_writer, fields):
             # replace character for osm fields
             fields = [field.replace(":", "_") for field in fields]
-            sav_writer.writerow(
-                [encode_if_str(row, field, sav_writer=sav_writer) for field in fields]
-            )
+            record = []
+            for field, var_name in zip(fields, sav_writer.varNames):
+                value = encode_if_str(row, field, sav_writer=sav_writer)
+                if (
+                    isinstance(value, bool)
+                    and sav_writer.varTypes[var_name] != SAV_NUMERIC_TYPE
+                ):
+                    value = str(value)
+                record.append(value)
+            sav_writer.writerow(record)
 
         sav_defs = {}