From 87430a11cf1036fcb61fc69c65710be4af63319a Mon Sep 17 00:00:00 2001
From: Colin Claverie <coclav.public@gmail.com>
Date: Wed, 21 Feb 2024 09:51:58 +0000
Subject: [PATCH] Update README.md

Add example for case-when in a select
---
 README.md | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/README.md b/README.md
index 1c41dcf..154eaca 100644
--- a/README.md
+++ b/README.md
@@ -129,6 +129,33 @@ Schema::table('users', function (Blueprint $table) {
 });
 ```
 
+To use the case-when in a `Select` wrap it in an `Alias`. Example:
+
+```php
+use Tpetry\QueryExpressions\Language\{CaseGroup, CaseRule};
+use Tpetry\QueryExpressions\Language\Alias;
+use Tpetry\QueryExpressions\Operator\Comparison\{Equal};
+use Tpetry\QueryExpressions\Value\Value;
+use App\Models\User;
+
+User::query()
+  ->select([
+    "id",
+    new Alias(
+      new CaseGroup(
+        when: [
+          new CaseRule(new Value("Admin"), new Equal("role", new Value(3))),
+          new CaseRule(new Value("Editor"), new Equal("role", new Value(2))),
+          new CaseRule(new Value("Viewer"), new Equal("role", new Value(1)))
+        ],
+        else: new Value("Unknown Role")
+      ),
+      "role_name"
+    )
+  ])
+  ->get();
+```
+
 ### Operators
 
 #### Arithmetic Operators