From 7415f7f584d100782380958937a07878d194ceda Mon Sep 17 00:00:00 2001
From: Wing-Kam Wong <wingkwong.code@gmail.com>
Date: Fri, 1 Jul 2022 19:45:11 +0800
Subject: [PATCH] wip: handle empty & not empty for hm

---
 .../db/sql-data-mapper/lib/sql/conditionV2.ts | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/packages/nocodb/src/lib/db/sql-data-mapper/lib/sql/conditionV2.ts b/packages/nocodb/src/lib/db/sql-data-mapper/lib/sql/conditionV2.ts
index dc617c2ca1..49ea65bd16 100644
--- a/packages/nocodb/src/lib/db/sql-data-mapper/lib/sql/conditionV2.ts
+++ b/packages/nocodb/src/lib/db/sql-data-mapper/lib/sql/conditionV2.ts
@@ -87,6 +87,31 @@ const parseConditionV2 = async (
       const parentModel = await parentColumn.getModel();
       await parentModel.getColumns();
       if (colOptions.type === RelationTypes.HAS_MANY) {
+        if (
+          filter.comparison_op === 'empty' ||
+          filter.comparison_op === 'notempty'
+        ) {
+          const selectParentQb = knex(parentModel.table_name);
+          console.log('HERE1');
+          console.log(selectParentQb.toQuery());
+
+          const selectHmCount = knex(childModel.table_name)
+            .select(childColumn.column_name)
+            .count(childColumn.column_name)
+            .whereNotNull(childColumn.column_name)
+            .groupBy(childColumn.column_name);
+          console.log('HERE2');
+          console.log(selectHmCount.toQuery());
+
+          const q = selectParentQb.leftJoin(
+            selectHmCount.as('t2'),
+            parentModel.table_name + '.' + parentColumn.column_name,
+            't2.' + childColumn.column_name
+          );
+          console.log('HERE3');
+          console.log(q.toQuery());
+          return q;
+        }
         const selectQb = knex(childModel.table_name).select(
           childColumn.column_name
         );