fix: give RICH_TEXT a distinct enum value so STRING and RICH_TEXT are not aliases

STRING and RICH_TEXT shared the same enum value ("string"), making them
indistinguishable in Python's Enum. This caused STRING attributes to
incorrectly get is_rich_text=True and RICH_TEXT multi-value restrictions
to apply to STRING.

Fixes PART-548

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Aryamanz29

pyatlan/model/enums.py

@@ -402,7 +402,7 @@ class AtlanCustomAttributePrimitiveType(str, Enum):
     URL = "url"
     SQL = "SQL"
     LONG = "long"
-    RICH_TEXT = "string"
+    RICH_TEXT = "rich_text"
 
 
 class AtlanDeleteType(str, Enum):

pyatlan/model/typedef.py

@@ -573,9 +573,16 @@ def create(
                 [type],
             )
             # Explicitly set all defaults to ensure inclusion during pydantic serialization
+            # RICH_TEXT has a distinct enum value but uses "string" as the
+            # API-level primitive type, same as STRING.
+            if attribute_type == AtlanCustomAttributePrimitiveType.RICH_TEXT:
+                primitive_type = AtlanCustomAttributePrimitiveType.STRING.value
+            else:
+                primitive_type = attribute_type.value
+
             options = AttributeDef.Options(
                 custom_metadata_version="v2",
-                primitive_type=attribute_type.value,
+                primitive_type=primitive_type,
                 applicable_entity_types='["Asset"]',
                 allow_search=False,
                 max_str_length="100000000",
@@ -978,6 +985,7 @@ def create(
             AtlanCustomAttributePrimitiveType.GROUPS,
             AtlanCustomAttributePrimitiveType.URL,
             AtlanCustomAttributePrimitiveType.SQL,
+            AtlanCustomAttributePrimitiveType.RICH_TEXT,
         ):
             base_type = AtlanCustomAttributePrimitiveType.STRING.value
         else:
@@ -1104,6 +1112,7 @@ async def _get_all_qualified_names_async(asset_type: str):
             AtlanCustomAttributePrimitiveType.GROUPS,
             AtlanCustomAttributePrimitiveType.URL,
             AtlanCustomAttributePrimitiveType.SQL,
+            AtlanCustomAttributePrimitiveType.RICH_TEXT,
         ):
             base_type = AtlanCustomAttributePrimitiveType.STRING.value
         else:

pyatlan_v9/model/typedef.py

@@ -572,9 +572,14 @@ def creator(
                 ["type"],
                 [type],
             )
+            if attribute_type == AtlanCustomAttributePrimitiveType.RICH_TEXT:
+                primitive_type = AtlanCustomAttributePrimitiveType.STRING.value
+            else:
+                primitive_type = attribute_type.value
+
             options = AttributeDef.Options(
                 custom_metadata_version="v2",
-                primitive_type=attribute_type.value,
+                primitive_type=primitive_type,
                 applicable_entity_types='["Asset"]',
                 allow_search=False,
                 max_str_length="100000000",
@@ -1007,6 +1012,7 @@ def creator(
             AtlanCustomAttributePrimitiveType.GROUPS,
             AtlanCustomAttributePrimitiveType.URL,
             AtlanCustomAttributePrimitiveType.SQL,
+            AtlanCustomAttributePrimitiveType.RICH_TEXT,
         ):
             base_type = AtlanCustomAttributePrimitiveType.STRING.value
         else:
@@ -1135,6 +1141,7 @@ async def _get_all_qualified_names_async(asset_type: str):
             AtlanCustomAttributePrimitiveType.GROUPS,
             AtlanCustomAttributePrimitiveType.URL,
             AtlanCustomAttributePrimitiveType.SQL,
+            AtlanCustomAttributePrimitiveType.RICH_TEXT,
         ):
             base_type = AtlanCustomAttributePrimitiveType.STRING.value
         else:

tests/unit/test_typedef_model.py

@@ -480,6 +480,36 @@ def test_multi_value_select_setter_condition(self, client: AtlanClient):
                 == f"array<{AtlanCustomAttributePrimitiveType.STRING.value}>"
             )
 
+    def test_string_and_rich_text_are_distinct_enum_members(self):
+        """Test that STRING and RICH_TEXT are distinct enum members (not aliases)"""
+        assert (
+            AtlanCustomAttributePrimitiveType.STRING
+            is not AtlanCustomAttributePrimitiveType.RICH_TEXT
+        )
+        assert (
+            AtlanCustomAttributePrimitiveType.STRING
+            != AtlanCustomAttributePrimitiveType.RICH_TEXT
+        )
+        assert (
+            AtlanCustomAttributePrimitiveType.STRING.value
+            != AtlanCustomAttributePrimitiveType.RICH_TEXT.value
+        )
+
+    def test_string_attribute_is_not_rich_text(self, client: AtlanClient):
+        """Test that STRING attributes do NOT have is_rich_text set"""
+        with patch("pyatlan.model.typedef._get_all_qualified_names") as mock_get_qa:
+            mock_get_qa.return_value = set()
+            attr_def = AttributeDef.create(
+                client=client,
+                display_name="Plain String",
+                attribute_type=AtlanCustomAttributePrimitiveType.STRING,
+            )
+
+        assert attr_def.options
+        assert attr_def.options.is_rich_text is False
+        assert attr_def.options.primitive_type == "string"
+        assert attr_def.type_name == "string"
+
     def test_rich_text_attribute_creation(self, client: AtlanClient):
         """Test that RICH_TEXT attributes are created with correct options"""
         with patch("pyatlan.model.typedef._get_all_qualified_names") as mock_get_qa: