From dd8be14fdbc7c3841bca441bf65884a71101a72d Mon Sep 17 00:00:00 2001
From: kolaente <k@knt.li>
Date: Thu, 18 Jul 2024 15:21:37 +0200
Subject: [PATCH] fix(filters): make sure filters are replaced
 case-insensitively before filtering on the server

Resolves https://community.vikunja.io/t/filtering-startdate-now-is-invalid/2613
---
 frontend/src/helpers/filters.test.ts | 10 ++++++++++
 frontend/src/helpers/filters.ts      |  8 +++++++-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/frontend/src/helpers/filters.test.ts b/frontend/src/helpers/filters.test.ts
index 8c3267755..3804c8a8e 100644
--- a/frontend/src/helpers/filters.test.ts
+++ b/frontend/src/helpers/filters.test.ts
@@ -137,6 +137,16 @@ describe('Filter Transformation', () => {
 
 			expect(transformed).toBe('labels in 2 || labels in l')
 		})
+		
+		it('should correctly transform the cases of fields', () => {
+			const transformed = transformFilterStringForApi(
+				'startdate > now',
+				nullTitleToIdResolver,
+				nullTitleToIdResolver,
+			)
+
+			expect(transformed).toBe('start_date > now')
+		})
 	})
 
 	describe('To API', () => {
diff --git a/frontend/src/helpers/filters.ts b/frontend/src/helpers/filters.ts
index 587d260c6..029d3536b 100644
--- a/frontend/src/helpers/filters.ts
+++ b/frontend/src/helpers/filters.ts
@@ -66,10 +66,16 @@ export function transformFilterStringForApi(
 	labelResolver: (title: string) => number | null,
 	projectResolver: (title: string) => number | null,
 ): string {
+	
+	filter = filter.trim()
 
-	if (filter.trim() === '') {
+	if (filter === '') {
 		return ''
 	}
+	
+	AVAILABLE_FILTER_FIELDS.forEach(f => {
+		filter = filter.replace(new RegExp(f, 'ig'), f)
+	})
 
 	// Transform labels to ids
 	LABEL_FIELDS.forEach(field => {