fix(distributor): resolve model for GET /v1/video/generations/:task_id (#5133)

middleware/distributor.go

@@ -298,6 +298,7 @@ func getModelRequest(c *gin.Context) (*ModelRequest, bool, error) {
 		} else if c.Request.Method == http.MethodGet {
 			relayMode = relayconstant.RelayModeVideoFetchByID
 			shouldSelectChannel = false
+			modelRequest.Model = getTaskOriginModelName(c)
 		}
 		c.Set("relay_mode", relayMode)
 	} else if strings.Contains(c.Request.URL.Path, "/v1/video/generations") {
@@ -312,6 +313,7 @@ func getModelRequest(c *gin.Context) (*ModelRequest, bool, error) {
 		} else if c.Request.Method == http.MethodGet {
 			relayMode = relayconstant.RelayModeVideoFetchByID
 			shouldSelectChannel = false
+			modelRequest.Model = getTaskOriginModelName(c)
 		}
 		if _, ok := c.Get("relay_mode"); !ok {
 			c.Set("relay_mode", relayMode)
@@ -396,6 +398,31 @@ func getModelRequest(c *gin.Context) (*ModelRequest, bool, error) {
 	return &modelRequest, shouldSelectChannel, nil
 }
 
+// 修复 #4834: GET /v1/video/generations/:task_id && /v1/video/:task_id 此前不解析 model，
+// 当 token 启用「可用模型限制」时，下游 modelLimitEnable 校验会因
+// modelRequest.Model 为空而误报 "This token has no access to model"。
+// 从已存储的任务记录中回填 OriginModelName 即可让校验走在正确的模型上。
+func getTaskOriginModelName(c *gin.Context) string {
+	if !common.GetContextKeyBool(c, constant.ContextKeyTokenModelLimitEnabled) {
+		return ""
+	}
+
+	taskId := c.Param("task_id")
+	if taskId == "" {
+		// jimeng adapter
+		taskId = c.GetString("task_id")
+	}
+	if taskId == "" {
+		return ""
+	}
+
+	userId := c.GetInt("id")
+	if task, exist, err := model.GetByTaskId(userId, taskId); err == nil && exist && task != nil {
+		return task.Properties.OriginModelName
+	}
+	return ""
+}
+
 func SetupContextForSelectedChannel(c *gin.Context, channel *model.Channel, modelName string) *types.NewAPIError {
 	c.Set("original_model", modelName) // for retry
 	if channel == nil {