feat: lookup support - mm/hm lookup - WIP

packages/nocodb/src/db/generateMMLookupSelectQuery.ts

@@ -11,18 +11,23 @@ import type {
 import formulaQueryBuilderv2 from '~/db/formulav2/formulaQueryBuilderv2';
 import genRollupSelectv2 from '~/db/genRollupSelectv2';
 import { NcError } from '~/helpers/catchError';
+import {getAliasGenerator} from "~/utils";
 
 export default async function generateBTLookupSelectQuery({
   column,
   baseModelSqlv2,
   alias,
   model,
+    getAlias = getAliasGenerator('__lk_slt_')
 }: {
   column: Column;
   baseModelSqlv2: BaseModelSqlv2;
   alias: string;
   model: Model;
+    getAlias: ReturnType<typeof getAliasGenerator>
 }): Promise<any> {
+
+
   const knex = baseModelSqlv2.dbDriver;
 
   const rootAlias = alias;
@@ -30,7 +35,7 @@ export default async function generateBTLookupSelectQuery({
   {
     let aliasCount = 0,
       selectQb;
-    const alias = `__nc_lk_${aliasCount++}`;
+    const alias = getAlias();
     const lookup = await column.getColOptions<LookupColumn>();
     {
       const relationCol = await lookup.getRelationColumn();
@@ -62,7 +67,7 @@ export default async function generateBTLookupSelectQuery({
     let lookupColumn = await lookup.getLookupColumn();
     let prevAlias = alias;
     while (lookupColumn.uidt === UITypes.Lookup) {
-      const nestedAlias = `__nc_lk_nested_${aliasCount++}`;
+      const nestedAlias = getAlias();
       const nestedLookup = await lookupColumn.getColOptions<LookupColumn>();
       const relationCol = await nestedLookup.getRelationColumn();
       const relation =
@@ -70,9 +75,7 @@ export default async function generateBTLookupSelectQuery({
 
       // if any of the relation in nested lookup is
       // not belongs to then throw error as we don't support
-      if (relation.type !== RelationTypes.BELONGS_TO) {
+      if (relation.type === RelationTypes.BELONGS_TO) {
-        // NcError.badRequest('HasMany/ManyToMany lookup is not supported');
-      }
 
           const childColumn = await relation.getChildColumn();
           const parentColumn = await relation.getParentColumn();
@@ -87,13 +90,14 @@ export default async function generateBTLookupSelectQuery({
               `${prevAlias}.${childColumn.column_name}`,
           );
 
+      } else     if (relation.type === RelationTypes.HAS_MANY) {
 
+      }else     if (relation.type === RelationTypes.MANY_TO_MANY) {
+ const mmTableAlias = getAlias()
 
-
+          const mmModel = await relation.getMMModel();
-
+          const mmChildCol = await relation.getMMChildColumn();
-      const mmModel = await relationColumnOption.getMMModel();
+          const mmParentCol = await relation.getMMParentColumn();
-      const mmChildCol = await relationColumnOption.getMMChildColumn();
-      const mmParentCol = await relationColumnOption.getMMParentColumn();
 
           knex(
               `${baseModelSqlv2.getTnPath(
@@ -126,6 +130,10 @@ export default async function generateBTLookupSelectQuery({
                       }`,
                   ),
               )
+      }
+
+
+
 
       lookupColumn = await nestedLookup.getLookupColumn();
       prevAlias = nestedAlias;