Update README

README.md

@@ -12,41 +12,51 @@ Yet Another ORM library for Go, aims for developer friendly
 * Transaction
 * Logger Support
 * Bind struct with tag
+* Iteration Support via sql.Rows
+* sql.Scanner
 * Every feature comes with tests
 * Convention Over Configuration
 * Developer Friendly
 
 ## Conventions
 
+* Table name is the plural of struct name's snake case.
+  Disable pluralization with `db.SingularTable(true)`, or [specify your table name](#specify-table-name)
+* Column name is the snake case of field's name.
+* Use `Id int64` field as primary key.
+* Use tag `sql` to change field's property, change the tag name with `db.SetTagIdentifier(new_name)`.
+* Use `CreatedAt` to store record's created time if it exist.
+* Use `UpdatedAt` to store record's updated time if it exist.
+* Use `DeletedAt` to store record's deleted time if it exist. [Soft Delete](#soft-delete)
+
 ```go
-// TableName: `users`, gorm will pluralize struct's name as table name, you are possible to turn off this feature
 type User struct {
-	Id			 int64	   // Id: Database Primary key
+	Id			 int64
 	Birthday	 time.Time
 	Age			 int64
-	Name		 string  `sql:"size:255"` // set this field's length in database
+	Name		 string  `sql:"size:255"`
-	CreatedAt	 time.Time // Time of record is created, will be insert automatically
+	CreatedAt	 time.Time
-	UpdatedAt	 time.Time // Time of record is updated, will be updated automatically
+	UpdatedAt	 time.Time
-	DeletedAt	 time.Time // Time of record is deleted, refer `Soft Delete` for more
+	DeletedAt	 time.Time
 
 	Emails            []Email         // Embedded structs
 	BillingAddress    Address         // Embedded struct
-	BillingAddressId  sql.NullInt64   // Embedded struct BillingAddress's foreign key
+	BillingAddressId  sql.NullInt64   // BillingAddress's foreign key
-	ShippingAddress   Address         // Embedded struct
+	ShippingAddress   Address         // Another Embedded struct with same type
-	ShippingAddressId int64           // Embedded struct ShippingAddress's foreign key
+	ShippingAddressId int64           // ShippingAddress's foreign key
 	IgnoreMe          int64 `sql:"-"` // Ignore this field
 }
 
-type Email struct {    // TableName: `emails`
+type Email struct {
 	Id         int64
-	UserId     int64   // Foreign key for above embedded structs
+	UserId     int64   // Foreign key for User
-	Email      string  `sql:"type:varchar(100);"` // Set this field's type in database
+	Email      string  `sql:"type:varchar(100);"` // Set this field's type
 	Subscribed bool
 }
 
-type Address struct {  // TableName: `addresses`
+type Address struct {
 	Id       int64
-	Address1 string         `sql:"not null;unique"` // Set this field as not null and unique in database
+	Address1 string         `sql:"not null;unique"` // Set this field as not nullable and unique in database
 	Address2 string         `sql:"type:varchar(100);unique"`
 	Post     sql.NullString `sql:not null`
     // FYI, "NOT NULL" will only works well with NullXXX Scanner, because golang will initalize a default value for most type...
@@ -735,7 +745,6 @@ db.Where("email = ?", "x@example.org").Attrs(User{RegisteredIp: "111.111.111.111
 ```
 
 ## TODO
-* Rows, Row
 * Cache Stmt for performance
 * Join, Having, Group, Includes
 * Scopes, Valiations

do.go

@@ -341,6 +341,16 @@ func (s *Do) related(value interface{}, foreign_keys ...string) *Do {
 	return s
 }
 
+func (s *Do) row() *sql.Row {
+	s.prepareQuerySql()
+	return s.db.db.QueryRow(s.sql, s.sqlVars...)
+}
+
+func (s *Do) rows() (*sql.Rows, error) {
+	s.prepareQuerySql()
+	return s.db.db.Query(s.sql, s.sqlVars...)
+}
+
 func (s *Do) query() *Do {
 	defer s.trace(time.Now())
 	var (
@@ -400,12 +410,8 @@ func (s *Do) query() *Do {
 
 func (s *Do) count(value interface{}) *Do {
 	defer s.trace(time.Now())
-
 	s.search = s.search.clone().selects("count(*)")
-	s.prepareQuerySql()
+	s.err(s.row().Scan(value))
-	if !s.db.hasError() {
-		s.err(s.db.db.QueryRow(s.sql, s.sqlVars...).Scan(value))
-	}
 	return s
 }
 
@@ -419,11 +425,7 @@ func (s *Do) pluck(column string, value interface{}) *Do {
 		return s
 	}
 
-	s.prepareQuerySql()
+	rows, err := s.rows()
-
-	if !s.db.hasError() {
-		rows, err := s.db.db.Query(s.sql, s.sqlVars...)
-
 	if s.err(err) == nil {
 		defer rows.Close()
 		for rows.Next() {
@@ -432,7 +434,6 @@ func (s *Do) pluck(column string, value interface{}) *Do {
 			dest_out.Set(reflect.Append(dest_out, reflect.ValueOf(dest).Elem()))
 		}
 	}
-	}
 	return s
 }
 

gorm_test.go

@@ -1364,6 +1364,33 @@ func TestQueryChain(t *testing.T) {
 	}
 }
 
+func TestRow(t *testing.T) {
+	row := db.Table("users").Where("name = ?", "2").Select("age").Row()
+	var age int64
+	row.Scan(&age)
+	if age != 20 {
+		t.Errorf("Scan with Row")
+	}
+}
+
+func TestRows(t *testing.T) {
+	rows, err := db.Table("users").Where("name = ?", "3").Select("name, age").Rows()
+	if err != nil {
+		t.Errorf("Not error should happen, but got", 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 with name 3")
+	}
+}
+
 func BenchmarkGorm(b *testing.B) {
 	b.N = 2000
 	for x := 0; x < b.N; x++ {

main.go

@@ -93,6 +93,14 @@ func (s *DB) Find(out interface{}, where ...interface{}) *DB {
 	return s.clone().do(out).where(where...).query().db
 }
 
+func (s *DB) Row() *sql.Row {
+	return s.do(s.data).row()
+}
+
+func (s *DB) Rows() (*sql.Rows, error) {
+	return s.do(s.data).rows()
+}
+
 func (s *DB) Attrs(attrs ...interface{}) *DB {
 	return s.clone().search.attrs(attrs...).db
 }