feat: enhance start node object value check (#30732)

web/app/components/app/configuration/config-var/config-modal/index.tsx

@@ -83,7 +83,7 @@ const ConfigModal: FC<IConfigModalProps> = ({
     if (!isJsonObject || !tempPayload.json_schema)
       return ''
     try {
-      return JSON.stringify(JSON.parse(tempPayload.json_schema), null, 2)
+      return tempPayload.json_schema
     }
     catch {
       return ''

web/app/components/base/chat/chat/utils.ts

@@ -37,7 +37,7 @@ export const getProcessedInputs = (inputs: Record<string, any>, inputsForm: Inpu
       return
     }
 
-    if (!inputValue)
+    if (inputValue == null)
       return
 
     if (item.type === InputVarType.singleFile) {
@@ -52,6 +52,20 @@ export const getProcessedInputs = (inputs: Record<string, any>, inputsForm: Inpu
       else
         processedInputs[item.variable] = getProcessedFiles(inputValue)
     }
+    else if (item.type === InputVarType.jsonObject) {
+      // Prefer sending an object if the user entered valid JSON; otherwise keep the raw string.
+      try {
+        const v = typeof inputValue === 'string' ? JSON.parse(inputValue) : inputValue
+        if (v && typeof v === 'object' && !Array.isArray(v))
+          processedInputs[item.variable] = v
+        else
+          processedInputs[item.variable] = inputValue
+      }
+      catch {
+        // keep original string; backend will parse/validate
+        processedInputs[item.variable] = inputValue
+      }
+    }
   })
 
   return processedInputs

web/app/components/share/text-generation/run-once/index.tsx

@@ -195,7 +195,7 @@ const RunOnce: FC<IRunOnceProps> = ({
                         noWrapper
                         className="bg h-[80px] overflow-y-auto rounded-[10px] bg-components-input-bg-normal p-1"
                         placeholder={
-                          <div className="whitespace-pre">{item.json_schema}</div>
+                          <div className="whitespace-pre">{typeof item.json_schema === 'string' ? item.json_schema : JSON.stringify(item.json_schema || '', null, 2)}</div>
                         }
                       />
                     )}

web/app/components/workflow/nodes/_base/components/before-run-form/form-item.tsx

@@ -48,6 +48,12 @@ const FormItem: FC<Props> = ({
   const { t } = useTranslation()
   const { type } = payload
   const fileSettings = useHooksStore(s => s.configsMap?.fileSettings)
+  const jsonSchemaPlaceholder = React.useMemo(() => {
+    const schema = (payload as any)?.json_schema
+    if (!schema)
+      return ''
+    return typeof schema === 'string' ? schema : JSON.stringify(schema, null, 2)
+  }, [payload])
 
   const handleArrayItemChange = useCallback((index: number) => {
     return (newValue: any) => {
@@ -211,7 +217,7 @@ const FormItem: FC<Props> = ({
             noWrapper
             className="bg h-[80px] overflow-y-auto rounded-[10px] bg-components-input-bg-normal p-1"
             placeholder={
-              <div className="whitespace-pre">{payload.json_schema}</div>
+              <div className="whitespace-pre">{jsonSchemaPlaceholder}</div>
             }
           />
         )}

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

@@ -353,7 +353,7 @@ const formatItem = (
         try {
           if (type === VarType.object && v.json_schema) {
             varRes.children = {
-              schema: JSON.parse(v.json_schema),
+              schema: typeof v.json_schema === 'string' ? JSON.parse(v.json_schema) : v.json_schema,
             }
           }
         }

web/app/components/workflow/types.ts

@@ -223,7 +223,7 @@ export type InputVar = {
   getVarValueFromDependent?: boolean
   hide?: boolean
   isFileItem?: boolean
-  json_schema?: string // for jsonObject type
+  json_schema?: string | Record<string, any> // for jsonObject type
 } & Partial<UploadFileSetting>
 
 export type ModelConfig = {

web/models/debug.ts

@@ -62,7 +62,7 @@ export type PromptVariable = {
   icon?: string
   icon_background?: string
   hide?: boolean // used in frontend to hide variable
-  json_schema?: string
+  json_schema?: string | Record<string, any>
 }
 
 export type CompletionParams = {

web/service/workflow-payload.ts

@@ -66,7 +66,30 @@ export const sanitizeWorkflowDraftPayload = (params: WorkflowDraftSyncParams): W
   if (!graph?.nodes?.length)
     return params
 
-  const sanitizedNodes = graph.nodes.map(node => sanitizeTriggerPluginNode(node as Node<TriggerPluginNodePayload>))
+  const sanitizedNodes = graph.nodes.map((node) => {
+    // First sanitize known node types (TriggerPlugin)
+    const n = sanitizeTriggerPluginNode(node as Node<TriggerPluginNodePayload>) as Node<any>
+
+    // Normalize Start node variable json_schema: ensure dict, not string
+    if ((n.data as any)?.type === BlockEnum.Start && Array.isArray((n.data as any).variables)) {
+      const next = { ...n, data: { ...n.data } }
+      next.data.variables = (n.data as any).variables.map((v: any) => {
+        if (v && v.type === 'json_object' && typeof v.json_schema === 'string') {
+          try {
+            const obj = JSON.parse(v.json_schema)
+            return { ...v, json_schema: obj }
+          }
+          catch {
+            return v
+          }
+        }
+        return v
+      })
+      return next
+    }
+
+    return n
+  })
 
   return {
     ...params,
@@ -126,7 +149,25 @@ export const hydrateWorkflowDraftResponse = (draft: FetchWorkflowDraftResponse):
           if (node.data)
             removeTempProperties(node.data as Record<string, unknown>)
 
-          return hydrateTriggerPluginNode(node)
+          let n = hydrateTriggerPluginNode(node)
+          // Normalize Start node variable json_schema to object when loading
+          if ((n.data as any)?.type === BlockEnum.Start && Array.isArray((n.data as any).variables)) {
+            const next = { ...n, data: { ...n.data } } as Node<any>
+            next.data.variables = (n.data as any).variables.map((v: any) => {
+              if (v && v.type === 'json_object' && typeof v.json_schema === 'string') {
+                try {
+                  const obj = JSON.parse(v.json_schema)
+                  return { ...v, json_schema: obj }
+                }
+                catch {
+                  return v
+                }
+              }
+              return v
+            })
+            n = next
+          }
+          return n
         })
     }
 

web/service/workflow.ts

@@ -9,6 +9,7 @@ import type {
 } from '@/types/workflow'
 import { get, post } from './base'
 import { getFlowPrefix } from './utils'
+import { sanitizeWorkflowDraftPayload } from './workflow-payload'
 
 export const fetchWorkflowDraft = (url: string) => {
   return get(url, {}, { silent: true }) as Promise<FetchWorkflowDraftResponse>
@@ -18,7 +19,8 @@ export const syncWorkflowDraft = ({ url, params }: {
   url: string
   params: Pick<FetchWorkflowDraftResponse, 'graph' | 'features' | 'environment_variables' | 'conversation_variables'>
 }) => {
-  return post<CommonResponse & { updated_at: number, hash: string }>(url, { body: params }, { silent: true })
+  const sanitized = sanitizeWorkflowDraftPayload(params)
+  return post<CommonResponse & { updated_at: number, hash: string }>(url, { body: sanitized }, { silent: true })
 }
 
 export const fetchNodesDefaultConfigs = (url: string) => {