From a86c87fe1442afce9285e39255914e01012b4449 Mon Sep 17 00:00:00 2001
From: Philip Korsholm <88927411+pKorsholm@users.noreply.github.com>
Date: Tue, 13 Feb 2024 16:07:34 +0800
Subject: [PATCH] Feat(utils): psql unique index instead of constraint (#6386)

**What**
- always return an index expression, also for unique constraints

**why**
- constraints can't be partial, meaning `UNIQUE ... WHERE` is not possible with constraints
- constraints are indicies under the hood so it doesn't change the behavior of the system when we're not using constraint specific features but just using them for `UNIQUE`
---
 .changeset/hot-coins-itch.md                               | 5 +++++
 .../utils/src/common/__tests__/create-psql-index-helper.ts | 6 +++---
 packages/utils/src/common/create-psql-index-helper.ts      | 7 ++-----
 3 files changed, 10 insertions(+), 8 deletions(-)
 create mode 100644 .changeset/hot-coins-itch.md

diff --git a/.changeset/hot-coins-itch.md b/.changeset/hot-coins-itch.md
new file mode 100644
index 0000000000..4f4a08dbf5
--- /dev/null
+++ b/.changeset/hot-coins-itch.md
@@ -0,0 +1,5 @@
+---
+"@medusajs/utils": patch
+---
+
+feat(utils): make psql index util return index instead of constraint for unique indicies becuase partial constraints don't exist :'(
diff --git a/packages/utils/src/common/__tests__/create-psql-index-helper.ts b/packages/utils/src/common/__tests__/create-psql-index-helper.ts
index ec2c70178e..321e87c913 100644
--- a/packages/utils/src/common/__tests__/create-psql-index-helper.ts
+++ b/packages/utils/src/common/__tests__/create-psql-index-helper.ts
@@ -73,9 +73,9 @@ describe("createPsqlIndexStatementHelper", function () {
 
     const indexStatement = createPsqlIndexStatementHelper(options)
     expect(indexStatement).toEqual(
-      `ALTER TABLE IF EXISTS "${options.tableName}" ADD CONSTRAINT "${
-        options.name
-      }" UNIQUE (${options.columns.join(", ")}) WHERE ${options.where}`
+      `CREATE UNIQUE INDEX IF NOT EXISTS "${options.name}" ON "${
+        options.tableName
+      }" (${options.columns.join(", ")}) WHERE ${options.where}`
     )
   })
 })
diff --git a/packages/utils/src/common/create-psql-index-helper.ts b/packages/utils/src/common/create-psql-index-helper.ts
index 8d7529d582..f482bd3606 100644
--- a/packages/utils/src/common/create-psql-index-helper.ts
+++ b/packages/utils/src/common/create-psql-index-helper.ts
@@ -45,10 +45,7 @@ export function createPsqlIndexStatementHelper({
   columns = Array.isArray(columns) ? columns.join(", ") : columns
   const typeStr = type ? ` USING ${type}` : ""
   const optionsStr = where ? ` WHERE ${where}` : ""
+  const uniqueStr = unique ? "UNIQUE " : ""
 
-  if (!unique) {
-    return `CREATE INDEX IF NOT EXISTS "${name}" ON "${tableName}"${typeStr} (${columns})${optionsStr}`
-  } else {
-    return `ALTER TABLE IF EXISTS "${tableName}" ADD CONSTRAINT "${name}" UNIQUE (${columns})${optionsStr}`
-  }
+  return `CREATE ${uniqueStr}INDEX IF NOT EXISTS "${name}" ON "${tableName}"${typeStr} (${columns})${optionsStr}`
 }