Merge pull request #175 from sdispater/feature/default-supertable

CHANGELOG.md

@@ -1,6 +1,10 @@
 # Change Log
 
-## [Unreleased]
+## [0.9.2] - 2022-02-08
+
+### Changed
+
+- When a table's only child is a table or array of table, it is created as a super table. ([#175](https://github.com/sdispater/tomlkit/issues/175))
 
 ## [0.9.1] - 2022-02-07
 
@@ -241,7 +245,8 @@
 - Fixed handling of super tables with different sections.
 - Fixed raw strings escaping.
 
-[unreleased]: https://github.com/sdispater/tomlkit/compare/0.9.1...master
+[unreleased]: https://github.com/sdispater/tomlkit/compare/0.9.2...master
+[0.9.2]: https://github.com/sdispater/tomlkit/releases/tag/0.9.2
 [0.9.1]: https://github.com/sdispater/tomlkit/releases/tag/0.9.1
 [0.9.0]: https://github.com/sdispater/tomlkit/releases/tag/0.9.0
 [0.8.0]: https://github.com/sdispater/tomlkit/releases/tag/0.8.0

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "tomlkit"
-version = "0.9.1"
+version = "0.9.2"
 description = "Style preserving TOML library"
 authors = ["Sébastien Eustace <sebastien@eustace.io>"]
 license = "MIT"

tests/test_api.py

@@ -382,3 +382,13 @@ def test_value_rejects_values_with_appendage(raw):
     """Values that appear valid at the beginning but leave chars unparsed are rejected."""
     with pytest.raises(tomlkit.exceptions.ParseError):
         tomlkit.value(raw)
+
+
+def test_create_super_table_with_table():
+    data = {"foo": {"bar": {"a": 1}}}
+    assert dumps(data) == "[foo.bar]\na = 1\n"
+
+
+def test_create_super_table_with_aot():
+    data = {"foo": {"bar": [{"a": 1}]}}
+    assert dumps(data) == "[[foo.bar]]\na = 1\n"

tomlkit/__init__.py

@@ -25,7 +25,7 @@
 from .api import ws
 
 
-__version__ = "0.9.1"
+__version__ = "0.9.2"
 __all__ = [
     "aot",
     "array",

tomlkit/items.py

@@ -90,6 +90,14 @@ def item(
             key=lambda i: (isinstance(i[1], dict), i[0] if _sort_keys else 1),
         ):
             val[k] = item(v, _parent=val, _sort_keys=_sort_keys)
+        only_child = len(value) == 1 and val[next(iter(value))]
+        if (
+            table_constructor is Table
+            and only_child
+            and isinstance(only_child, (AoT, Table))
+        ):
+            # The table becomes super table if the only child is a table or AoT.
+            val._is_super_table = True
 
         return val
     elif isinstance(value, (list, tuple)):