Policy要继承IPolicy

WebVue/src/hooks/useFileTypePolicy.ts

@@ -8,6 +8,7 @@ export const useFileTypePolicy = () => {
   const getSelectOption = async (blank: boolean): Promise<SelectOption[]> => {
     let selectOptions: SelectOption[] = [];
     let str = storage.get(fileTypePolicy);
+  
     if (str === null) {
       selectOptions = await fileTypePolicyService.FindSelectOption(blank);
       storage.set(fileTypePolicy, JSON.stringify(selectOptions));