Clean up legacy conditions data in if-else nodes to prevent misjudgments (#28148)

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

web/app/components/workflow/nodes/_base/components/variable/utils.ts

@@ -42,7 +42,7 @@ import type { RAGPipelineVariable } from '@/models/pipeline'
 import type { WebhookTriggerNodeType } from '@/app/components/workflow/nodes/trigger-webhook/types'
 import type { PluginTriggerNodeType } from '@/app/components/workflow/nodes/trigger-plugin/types'
 import PluginTriggerNodeDefault from '@/app/components/workflow/nodes/trigger-plugin/default'
-
+import type { CaseItem, Condition } from '@/app/components/workflow/nodes/if-else/types'
 import {
   AGENT_OUTPUT_STRUCT,
   FILE_STRUCT,
@@ -1305,10 +1305,7 @@ export const getNodeUsedVars = (node: Node): ValueSelector[] => {
       break
     }
     case BlockEnum.IfElse: {
-      res
-        = (data as IfElseNodeType).conditions?.map((c) => {
-          return c.variable_selector || []
-        }) || []
+      res = []
       res.push(
         ...((data as IfElseNodeType).cases || [])
           .flatMap(c => c.conditions || [])
@@ -1480,9 +1477,22 @@ export const getNodeUsedVarPassToServerKey = (
       break
     }
     case BlockEnum.IfElse: {
-      const targetVar = (data as IfElseNodeType).conditions?.find(
-        c => c.variable_selector?.join('.') === valueSelector.join('.'),
-      )
+      const findConditionInCases = (cases: CaseItem[]): Condition | undefined => {
+        for (const caseItem of cases) {
+          for (const condition of caseItem.conditions || []) {
+            if (condition.variable_selector?.join('.') === valueSelector.join('.'))
+              return condition
+
+            if (condition.sub_variable_condition) {
+              const found = findConditionInCases([condition.sub_variable_condition])
+              if (found)
+                return found
+            }
+          }
+        }
+        return undefined
+      }
+      const targetVar = findConditionInCases((data as IfElseNodeType).cases || [])
       if (targetVar) res = `#${valueSelector.join('.')}#`
       break
     }
@@ -1634,13 +1644,6 @@ export const updateNodeVars = (
       }
       case BlockEnum.IfElse: {
         const payload = data as IfElseNodeType
-        if (payload.conditions) {
-          payload.conditions = payload.conditions.map((c) => {
-            if (c.variable_selector?.join('.') === oldVarSelector.join('.'))
-              c.variable_selector = newVarSelector
-            return c
-          })
-        }
         if (payload.cases) {
           payload.cases = payload.cases.map((caseItem) => {
             if (caseItem.conditions) {