fix(api): Fix the issue that conversation variable saving not working

api/core/workflow/nodes/variable_assigner/common/helpers.py

@@ -28,7 +28,7 @@ def variable_to_processed_data(selector: Sequence[str], seg: Segment) -> Updated
 
 
 def set_updated_variables(m: _T, updates: Sequence[UpdatedVariable]) -> _T:
-    # m[_UPDATED_VARIABLES_KEY] = updates
+    m[_UPDATED_VARIABLES_KEY] = updates
     return m
 
 

api/core/workflow/nodes/variable_assigner/v2/node.py

@@ -168,7 +168,7 @@ class VariableAssignerNode(BaseNode[VariableAssignerNodeData]):
             if (seg := self.graph_runtime_state.variable_pool.get(selector)) is not None
         ]
 
-        common_helpers.set_updated_variables(process_data, updated_variables)
+        process_data = common_helpers.set_updated_variables(process_data, updated_variables)
         return NodeRunResult(
             status=WorkflowNodeExecutionStatus.SUCCEEDED,
             inputs=inputs,