Add sql builder test

callbacks/query.go

@@ -19,11 +19,30 @@ func Query(db *gorm.DB) {
 	}
 
 	if db.Statement.SQL.String() == "" {
+		BuildQuerySQL(db)
+	}
+
+	rows, err := db.Statement.ConnPool.QueryContext(db.Statement.Context, db.Statement.SQL.String(), db.Statement.Vars...)
+	if err != nil {
+		db.AddError(err)
+		return
+	}
+	defer rows.Close()
+
+	gorm.Scan(rows, db, false)
+}
+
+func BuildQuerySQL(db *gorm.DB) {
 	clauseSelect := clause.Select{}
 
 	if len(db.Statement.Selects) > 0 {
 		for _, name := range db.Statement.Selects {
-				if f := db.Statement.Schema.LookUpField(name); f != nil {
+			if db.Statement.Schema == nil {
+				clauseSelect.Columns = append(clauseSelect.Columns, clause.Column{
+					Name: name,
+					Raw:  true,
+				})
+			} else if f := db.Statement.Schema.LookUpField(name); f != nil {
 				clauseSelect.Columns = append(clauseSelect.Columns, clause.Column{
 					Name: f.DBName,
 				})
@@ -50,7 +69,11 @@ func Query(db *gorm.DB) {
 		}
 
 		for name, conds := range db.Statement.Joins {
-				if relation, ok := db.Statement.Schema.Relationships.Relations[name]; ok {
+			if db.Statement.Schema == nil {
+				joins = append(joins, clause.Join{
+					Expression: clause.Expr{SQL: name, Vars: conds},
+				})
+			} else if relation, ok := db.Statement.Schema.Relationships.Relations[name]; ok {
 				tableAliasName := relation.Name
 
 				for _, s := range relation.FieldSchema.DBNames {
@@ -105,17 +128,8 @@ func Query(db *gorm.DB) {
 	} else {
 		db.Statement.AddClauseIfNotExists(clauseSelect)
 	}
+
 	db.Statement.Build("SELECT", "FROM", "WHERE", "GROUP BY", "ORDER BY", "LIMIT", "FOR")
-	}
-
-	rows, err := db.Statement.ConnPool.QueryContext(db.Statement.Context, db.Statement.SQL.String(), db.Statement.Vars...)
-	if err != nil {
-		db.AddError(err)
-		return
-	}
-	defer rows.Close()
-
-	gorm.Scan(rows, db, false)
 }
 
 func Preload(db *gorm.DB) {

callbacks/row.go

@@ -2,15 +2,11 @@ package callbacks
 
 import (
 	"github.com/jinzhu/gorm"
-	"github.com/jinzhu/gorm/clause"
 )
 
 func RowQuery(db *gorm.DB) {
 	if db.Statement.SQL.String() == "" {
-		db.Statement.AddClauseIfNotExists(clause.Select{})
-		db.Statement.AddClauseIfNotExists(clause.From{})
-
-		db.Statement.Build("SELECT", "FROM", "WHERE", "GROUP BY", "ORDER BY", "LIMIT", "FOR")
+		BuildQuerySQL(db)
 	}
 
 	if _, ok := db.Get("rows"); ok {

tests/sql_builder_test.go

@@ -0,0 +1,82 @@
+package tests_test
+
+import (
+	"testing"
+
+	"github.com/jinzhu/gorm"
+	. "github.com/jinzhu/gorm/tests"
+)
+
+func TestRow(t *testing.T) {
+	user1 := User{Name: "RowUser1", Age: 1}
+	user2 := User{Name: "RowUser2", Age: 10}
+	user3 := User{Name: "RowUser3", Age: 20}
+	DB.Save(&user1).Save(&user2).Save(&user3)
+
+	row := DB.Table("users").Where("name = ?", user2.Name).Select("age").Row()
+
+	var age int64
+	if err := row.Scan(&age); err != nil {
+		t.Fatalf("Failed to scan age, got %v", err)
+	}
+
+	if age != 10 {
+		t.Errorf("Scan with Row, age expects: %v, got %v", user2.Age, age)
+	}
+}
+
+func TestRows(t *testing.T) {
+	user1 := User{Name: "RowsUser1", Age: 1}
+	user2 := User{Name: "RowsUser2", Age: 10}
+	user3 := User{Name: "RowsUser3", Age: 20}
+	DB.Save(&user1).Save(&user2).Save(&user3)
+
+	rows, err := DB.Table("users").Where("name = ? or name = ?", user2.Name, user3.Name).Select("name, age").Rows()
+	if err != nil {
+		t.Errorf("Not error should happen, got %v", err)
+	}
+
+	count := 0
+	for rows.Next() {
+		var name string
+		var age int64
+		rows.Scan(&name, &age)
+		count++
+	}
+
+	if count != 2 {
+		t.Errorf("Should found two records")
+	}
+}
+
+func TestRaw(t *testing.T) {
+	user1 := User{Name: "ExecRawSqlUser1", Age: 1}
+	user2 := User{Name: "ExecRawSqlUser2", Age: 10}
+	user3 := User{Name: "ExecRawSqlUser3", Age: 20}
+	DB.Save(&user1).Save(&user2).Save(&user3)
+
+	type result struct {
+		Name  string
+		Email string
+	}
+
+	var results []result
+	DB.Raw("SELECT name, age FROM users WHERE name = ? or name = ?", user2.Name, user3.Name).Scan(&results)
+	if len(results) != 2 || results[0].Name != user2.Name || results[1].Name != user3.Name {
+		t.Errorf("Raw with scan")
+	}
+
+	rows, _ := DB.Raw("select name, age from users where name = ?", user3.Name).Rows()
+	count := 0
+	for rows.Next() {
+		count++
+	}
+	if count != 1 {
+		t.Errorf("Raw with Rows should find one record with name 3")
+	}
+
+	DB.Exec("update users set name=? where name in (?)", "jinzhu", []string{user1.Name, user2.Name, user3.Name})
+	if DB.Where("name in (?)", []string{user1.Name, user2.Name, user3.Name}).First(&User{}).Error != gorm.ErrRecordNotFound {
+		t.Error("Raw sql to update records")
+	}
+}