From 7aaac3a580d5c0a4b28853c8f53d8feb0327530f Mon Sep 17 00:00:00 2001
From: Jinzhu <wosmvp@gmail.com>
Date: Tue, 30 Jun 2020 23:06:48 +0800
Subject: [PATCH] Allow to use sql function in Group, Pluck

---
 chainable_api.go | 4 +++-
 finisher_api.go  | 4 +++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/chainable_api.go b/chainable_api.go
index dbd783fd..e2ba44cc 100644
--- a/chainable_api.go
+++ b/chainable_api.go
@@ -162,8 +162,10 @@ func (db *DB) Joins(query string, args ...interface{}) (tx *DB) {
 // Group specify the group method on the find
 func (db *DB) Group(name string) (tx *DB) {
 	tx = db.getInstance()
+
+	fields := strings.FieldsFunc(name, utils.IsChar)
 	tx.Statement.AddClause(clause.GroupBy{
-		Columns: []clause.Column{{Name: name}},
+		Columns: []clause.Column{{Name: name, Raw: len(fields) != 1}},
 	})
 	return
 }
diff --git a/finisher_api.go b/finisher_api.go
index 6d961811..af040106 100644
--- a/finisher_api.go
+++ b/finisher_api.go
@@ -8,6 +8,7 @@ import (
 	"strings"
 
 	"gorm.io/gorm/clause"
+	"gorm.io/gorm/utils"
 )
 
 // Create insert the value into database
@@ -325,9 +326,10 @@ func (db *DB) Pluck(column string, dest interface{}) (tx *DB) {
 		tx.AddError(ErrorModelValueRequired)
 	}
 
+	fields := strings.FieldsFunc(column, utils.IsChar)
 	tx.Statement.AddClauseIfNotExists(clause.Select{
 		Distinct: tx.Statement.Distinct,
-		Columns:  []clause.Column{{Name: column}},
+		Columns:  []clause.Column{{Name: column, Raw: len(fields) != 1}},
 	})
 	tx.Statement.Dest = dest
 	tx.callbacks.Query().Execute(tx)