refactor: if missing mm table handle it by static error message

packages/nocodb-sdk/src/lib/globals.ts

@@ -123,6 +123,10 @@ export enum TiptapMarksTypes {
   underline = 'underline',
 }
 
+export enum NcDataErrorCodes {
+  NC_ERR_MM_MODEL_NOT_FOUND = 'NC_ERR_MM_MODEL_NOT_FOUND',
+}
+
 type Roles = OrgUserRoles | ProjectRoles | WorkspaceUserRoles;
 
 type RolesObj = Partial<Record<Roles, boolean>>;

packages/nocodb-sdk/src/lib/index.ts

@@ -16,7 +16,7 @@ export {
   isLinksOrLTAR,
   isCreatedOrLastModifiedTimeCol,
   isCreatedOrLastModifiedByCol,
-  isMMSystemCol
+  isMMSystemCol,
 } from '~/lib/UITypes';
 export { default as CustomAPI, FileType } from '~/lib/CustomAPI';
 export { default as TemplateGenerator } from '~/lib/TemplateGenerator';

packages/nocodb/src/db/genRollupSelectv2.ts

@@ -1,4 +1,4 @@
-import { RelationTypes } from 'nocodb-sdk';
+import { NcDataErrorCodes, RelationTypes } from 'nocodb-sdk';
 import type { BaseModelSqlv2 } from '~/db/BaseModelSqlv2';
 import type { LinksColumn } from '~/models';
 import type { RollupColumn } from '~/models';
@@ -56,6 +56,12 @@ export default async function ({
       const mmChildCol = await relationColumnOption.getMMChildColumn();
       const mmParentCol = await relationColumnOption.getMMParentColumn();
 
+      if (!mmModel) {
+        return this.dbDriver.raw(`?`, [
+          NcDataErrorCodes.NC_ERR_MM_MODEL_NOT_FOUND,
+        ]);
+      }
+
       return {
         builder: knex(
           knex.raw(`?? as ??`, [