fix: loop node doesn't exit when it react the condition #24717 (#24844)

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

api/core/workflow/nodes/loop/loop_node.py

@@ -289,6 +289,8 @@ class LoopNode(BaseNode):
         Returns:
             dict:  {'check_break_result': bool}
         """
+        condition_selectors = self._extract_selectors_from_conditions(break_conditions)
+        extended_selectors = {**loop_variable_selectors, **condition_selectors}
         # Run workflow
         rst = graph_engine.run()
         current_index_variable = variable_pool.get([self.node_id, "index"])
@@ -314,24 +316,6 @@ class LoopNode(BaseNode):
                 and event.node_type == NodeType.LOOP_END
                 and not isinstance(event, NodeRunStreamChunkEvent)
             ):
-                # Check if variables in break conditions exist and process conditions
-                # Allow loop internal variables to be used in break conditions
-                available_conditions = []
-                for condition in break_conditions:
-                    variable = self.graph_runtime_state.variable_pool.get(condition.variable_selector)
-                    if variable:
-                        available_conditions.append(condition)
-
-                # Process conditions if at least one variable is available
-                if available_conditions:
-                    _, _, check_break_result = condition_processor.process_conditions(
-                        variable_pool=self.graph_runtime_state.variable_pool,
-                        conditions=available_conditions,
-                        operator=logical_operator,
-                    )
-                    if check_break_result:
-                        break
-                else:
                 check_break_result = True
                 yield self._handle_event_metadata(event=event, iter_run_index=current_index)
                 break
@@ -339,6 +323,23 @@ class LoopNode(BaseNode):
             if isinstance(event, NodeRunSucceededEvent):
                 yield self._handle_event_metadata(event=event, iter_run_index=current_index)
 
+                # Check if all variables in break conditions exist
+                exists_variable = False
+                for condition in break_conditions:
+                    if not self.graph_runtime_state.variable_pool.get(condition.variable_selector):
+                        exists_variable = False
+                        break
+                    else:
+                        exists_variable = True
+                if exists_variable:
+                    input_conditions, group_result, check_break_result = condition_processor.process_conditions(
+                        variable_pool=self.graph_runtime_state.variable_pool,
+                        conditions=break_conditions,
+                        operator=logical_operator,
+                    )
+                    if check_break_result:
+                        break
+
             elif isinstance(event, BaseGraphEvent):
                 if isinstance(event, GraphRunFailedEvent):
                     # Loop run failed
@@ -400,12 +401,8 @@ class LoopNode(BaseNode):
             else:
                 yield self._handle_event_metadata(event=cast(InNodeEvent, event), iter_run_index=current_index)
 
-        # Remove all nodes outputs from variable pool
-        for node_id in loop_graph.node_ids:
-            variable_pool.remove([node_id])
-
         _outputs: dict[str, Segment | int | None] = {}
-        for loop_variable_key, loop_variable_selector in loop_variable_selectors.items():
+        for loop_variable_key, loop_variable_selector in extended_selectors.items():
             _loop_variable_segment = variable_pool.get(loop_variable_selector)
             if _loop_variable_segment:
                 _outputs[loop_variable_key] = _loop_variable_segment
@@ -415,6 +412,10 @@ class LoopNode(BaseNode):
         _outputs["loop_round"] = current_index + 1
         self._node_data.outputs = _outputs
 
+        # Remove all nodes outputs from variable pool
+        for node_id in loop_graph.node_ids:
+            variable_pool.remove([node_id])
+
         if check_break_result:
             return {"check_break_result": True}
 
@@ -433,6 +434,13 @@ class LoopNode(BaseNode):
 
         return {"check_break_result": False}
 
+    def _extract_selectors_from_conditions(self, conditions: list) -> dict[str, list[str]]:
+        return {
+            condition.variable_selector[1]: condition.variable_selector
+            for condition in conditions
+            if condition.variable_selector and len(condition.variable_selector) >= 2
+        }
+
     def _handle_event_metadata(
         self,
         *,