From 735fc9d9308504fd43a76006af4488e3f6651c13 Mon Sep 17 00:00:00 2001
From: Ilya Semenov <semenov@inetss.com>
Date: Fri, 4 Jun 2021 18:19:19 +0700
Subject: [PATCH] fix: support optional GraphQL arguments in filter

---
 src/filter.ts                                 |  4 ++
 src/tests/main.test.ts                        | 30 ++++-----
 tap-snapshots/src/tests/main.test.ts.test.cjs | 65 +++++++++++++++++++
 3 files changed, 84 insertions(+), 15 deletions(-)

diff --git a/src/filter.ts b/src/filter.ts
index 3f3e6dc..f619391 100644
--- a/src/filter.ts
+++ b/src/filter.ts
@@ -31,6 +31,10 @@ export function apply_filter({
 	const ThisModel = query.modelClass()
 	const table_name = ThisModel.tableName
 	for (const [field, value] of Object.entries(filter_obj)) {
+		if (value === undefined) {
+			// Support optional GraphQL arguments in filter
+			continue
+		}
 		if (ThisModel.modifiers?.[field]) {
 			// Call modifier
 			query.modify(field, value)
diff --git a/src/tests/main.test.ts b/src/tests/main.test.ts
index ef984eb..4cde448 100644
--- a/src/tests/main.test.ts
+++ b/src/tests/main.test.ts
@@ -260,25 +260,25 @@ tap.test("Main", async (tap) => {
 
 	tap.test("root filter", async (tap) => {
 		tap.test("by field", async (tap) => {
-			tap.matchSnapshot(
-				await client.request(
-					gql`
-						{
-							posts(filter: { author_id: 2 }, take: 10) {
-								nodes {
-									id
-									text
-									author {
-										id
-										name
-									}
-								}
+			const query = gql`
+				query($author_id: Int) {
+					posts(filter: { author_id: $author_id }, take: 10) {
+						nodes {
+							id
+							text
+							author {
+								id
+								name
 							}
 						}
-					`,
-				),
+					}
+				}
+			`
+			tap.matchSnapshot(
+				await client.request(query, { author_id: 2 }),
 				"author_id: 2",
 			)
+			tap.matchSnapshot(await client.request(query), "author_id not defined")
 		})
 		tap.test("__in", async (tap) => {
 			tap.matchSnapshot(
diff --git a/tap-snapshots/src/tests/main.test.ts.test.cjs b/tap-snapshots/src/tests/main.test.ts.test.cjs
index ad0109a..ac41e3c 100644
--- a/tap-snapshots/src/tests/main.test.ts.test.cjs
+++ b/tap-snapshots/src/tests/main.test.ts.test.cjs
@@ -231,6 +231,71 @@ Object {
 }
 `
 
+exports[`src/tests/main.test.ts TAP Main root filter by field > author_id not defined 1`] = `
+Object {
+  "posts": Object {
+    "nodes": Array [
+      Object {
+        "author": Object {
+          "id": "1",
+          "name": "John",
+        },
+        "id": "7",
+        "text": "This is a draft",
+      },
+      Object {
+        "author": Object {
+          "id": "1",
+          "name": "John",
+        },
+        "id": "6",
+        "text": "COVID vs Flu?",
+      },
+      Object {
+        "author": Object {
+          "id": "2",
+          "name": "Mary",
+        },
+        "id": "5",
+        "text": "More good news!",
+      },
+      Object {
+        "author": Object {
+          "id": "2",
+          "name": "Mary",
+        },
+        "id": "4",
+        "text": "Good news from China.",
+      },
+      Object {
+        "author": Object {
+          "id": "2",
+          "name": "Mary",
+        },
+        "id": "3",
+        "text": "Latest COVID figures.",
+      },
+      Object {
+        "author": Object {
+          "id": "1",
+          "name": "John",
+        },
+        "id": "2",
+        "text": "Is communism dead yet?",
+      },
+      Object {
+        "author": Object {
+          "id": "1",
+          "name": "John",
+        },
+        "id": "1",
+        "text": "Oil price rising.",
+      },
+    ],
+  },
+}
+`
+
 exports[`src/tests/main.test.ts TAP Main root filter by field > author_id: 2 1`] = `
 Object {
   "posts": Object {