Fix Pluck with Table only

finisher_api.go

@@ -289,6 +289,9 @@ func (db *DB) Pluck(column string, dest interface{}) (tx *DB) {
 				column = f.DBName
 			}
 		}
+	} else if tx.Statement.Table == "" {
+		tx.AddError(ErrorModelValueRequired)
+	}
 
 	tx.Statement.AddClauseIfNotExists(clause.Select{
 		Distinct: tx.Statement.Distinct,
@@ -296,9 +299,6 @@ func (db *DB) Pluck(column string, dest interface{}) (tx *DB) {
 	})
 	tx.Statement.Dest = dest
 	tx.callbacks.Query().Execute(tx)
-	} else {
-		tx.AddError(ErrorModelValueRequired)
-	}
 	return
 }
 

scan.go

@@ -84,6 +84,7 @@ func Scan(rows *sql.Rows, db *DB, initialized bool) {
 
 			db.Statement.ReflectValue.Set(reflect.MakeSlice(db.Statement.ReflectValue.Type(), 0, 0))
 
+			if db.Statement.Schema != nil {
 				for idx, column := range columns {
 					if field := db.Statement.Schema.LookUpField(column); field != nil && field.Readable {
 						fields[idx] = field
@@ -104,6 +105,7 @@ func Scan(rows *sql.Rows, db *DB, initialized bool) {
 						values[idx] = &sql.RawBytes{}
 					}
 				}
+			}
 
 			// pluck values into slice of data
 			isPluck := len(fields) == 1 && reflectValueType.Kind() != reflect.Struct

tests/distinct_test.go

@@ -21,7 +21,7 @@ func TestDistinct(t *testing.T) {
 	}
 
 	var names []string
-	DB.Model(&User{}).Where("name like ?", "distinct%").Order("name").Pluck("Name", &names)
+	DB.Table("users").Where("name like ?", "distinct%").Order("name").Pluck("name", &names)
 	AssertEqual(t, names, []string{"distinct", "distinct", "distinct", "distinct-2", "distinct-3"})
 
 	var names1 []string