288 lines
8.1 KiB
Go
288 lines
8.1 KiB
Go
|
package gorm
|
||
|
|
|
||
|
|
import (
|
||
|
|
"database/sql"
|
||
|
|
"database/sql/driver"
|
||
|
|
"reflect"
|
||
|
|
"strings"
|
||
|
|
"time"
|
||
|
|
|
||
|
|
"gorm.io/gorm/schema"
|
||
|
|
)
|
||
|
|
|
||
|
|
func prepareValues(values []interface{}, db *DB, columnTypes []*sql.ColumnType, columns []string) {
|
||
|
|
if db.Statement.Schema != nil {
|
||
|
|
for idx, name := range columns {
|
||
|
|
if field := db.Statement.Schema.LookUpField(name); field != nil {
|
||
|
|
values[idx] = reflect.New(reflect.PtrTo(field.FieldType)).Interface()
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
values[idx] = new(interface{})
|
||
|
|
}
|
||
|
|
} else if len(columnTypes) > 0 {
|
||
|
|
for idx, columnType := range columnTypes {
|
||
|
|
if columnType.ScanType() != nil {
|
||
|
|
values[idx] = reflect.New(reflect.PtrTo(columnType.ScanType())).Interface()
|
||
|
|
} else {
|
||
|
|
values[idx] = new(interface{})
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
for idx := range columns {
|
||
|
|
values[idx] = new(interface{})
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func scanIntoMap(mapValue map[string]interface{}, values []interface{}, columns []string) {
|
||
|
|
for idx, column := range columns {
|
||
|
|
if reflectValue := reflect.Indirect(reflect.Indirect(reflect.ValueOf(values[idx]))); reflectValue.IsValid() {
|
||
|
|
mapValue[column] = reflectValue.Interface()
|
||
|
|
if valuer, ok := mapValue[column].(driver.Valuer); ok {
|
||
|
|
mapValue[column], _ = valuer.Value()
|
||
|
|
} else if b, ok := mapValue[column].(sql.RawBytes); ok {
|
||
|
|
mapValue[column] = string(b)
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
mapValue[column] = nil
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (db *DB) scanIntoStruct(sch *schema.Schema, rows *sql.Rows, reflectValue reflect.Value, values []interface{}, columns []string, fields []*schema.Field, joinFields [][2]*schema.Field) {
|
||
|
|
for idx, column := range columns {
|
||
|
|
if sch == nil {
|
||
|
|
values[idx] = reflectValue.Interface()
|
||
|
|
} else if field := sch.LookUpField(column); field != nil && field.Readable {
|
||
|
|
values[idx] = reflect.New(reflect.PtrTo(field.IndirectFieldType)).Interface()
|
||
|
|
} else if names := strings.Split(column, "__"); len(names) > 1 {
|
||
|
|
if rel, ok := sch.Relationships.Relations[names[0]]; ok {
|
||
|
|
if field := rel.FieldSchema.LookUpField(strings.Join(names[1:], "__")); field != nil && field.Readable {
|
||
|
|
values[idx] = reflect.New(reflect.PtrTo(field.IndirectFieldType)).Interface()
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
}
|
||
|
|
values[idx] = &sql.RawBytes{}
|
||
|
|
} else if len(columns) == 1 {
|
||
|
|
sch = nil
|
||
|
|
values[idx] = reflectValue.Interface()
|
||
|
|
} else {
|
||
|
|
values[idx] = &sql.RawBytes{}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
db.RowsAffected++
|
||
|
|
db.AddError(rows.Scan(values...))
|
||
|
|
|
||
|
|
if sch != nil {
|
||
|
|
for idx, column := range columns {
|
||
|
|
if field := sch.LookUpField(column); field != nil && field.Readable {
|
||
|
|
field.Set(reflectValue, values[idx])
|
||
|
|
} else if names := strings.Split(column, "__"); len(names) > 1 {
|
||
|
|
if rel, ok := sch.Relationships.Relations[names[0]]; ok {
|
||
|
|
if field := rel.FieldSchema.LookUpField(strings.Join(names[1:], "__")); field != nil && field.Readable {
|
||
|
|
relValue := rel.Field.ReflectValueOf(reflectValue)
|
||
|
|
value := reflect.ValueOf(values[idx]).Elem()
|
||
|
|
|
||
|
|
if relValue.Kind() == reflect.Ptr && relValue.IsNil() {
|
||
|
|
if value.IsNil() {
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
relValue.Set(reflect.New(relValue.Type().Elem()))
|
||
|
|
}
|
||
|
|
|
||
|
|
field.Set(relValue, values[idx])
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
type ScanMode uint8
|
||
|
|
|
||
|
|
const (
|
||
|
|
ScanInitialized ScanMode = 1 << 0 // 1
|
||
|
|
ScanUpdate ScanMode = 1 << 1 // 2
|
||
|
|
ScanOnConflictDoNothing ScanMode = 1 << 2 // 4
|
||
|
|
)
|
||
|
|
|
||
|
|
func Scan(rows *sql.Rows, db *DB, mode ScanMode) {
|
||
|
|
var (
|
||
|
|
columns, _ = rows.Columns()
|
||
|
|
values = make([]interface{}, len(columns))
|
||
|
|
initialized = mode&ScanInitialized != 0
|
||
|
|
update = mode&ScanUpdate != 0
|
||
|
|
onConflictDonothing = mode&ScanOnConflictDoNothing != 0
|
||
|
|
)
|
||
|
|
|
||
|
|
db.RowsAffected = 0
|
||
|
|
|
||
|
|
switch dest := db.Statement.Dest.(type) {
|
||
|
|
case map[string]interface{}, *map[string]interface{}:
|
||
|
|
if initialized || rows.Next() {
|
||
|
|
columnTypes, _ := rows.ColumnTypes()
|
||
|
|
prepareValues(values, db, columnTypes, columns)
|
||
|
|
|
||
|
|
db.RowsAffected++
|
||
|
|
db.AddError(rows.Scan(values...))
|
||
|
|
|
||
|
|
mapValue, ok := dest.(map[string]interface{})
|
||
|
|
if !ok {
|
||
|
|
if v, ok := dest.(*map[string]interface{}); ok {
|
||
|
|
if *v == nil {
|
||
|
|
*v = map[string]interface{}{}
|
||
|
|
}
|
||
|
|
mapValue = *v
|
||
|
|
}
|
||
|
|
}
|
||
|
|
scanIntoMap(mapValue, values, columns)
|
||
|
|
}
|
||
|
|
case *[]map[string]interface{}, []map[string]interface{}:
|
||
|
|
columnTypes, _ := rows.ColumnTypes()
|
||
|
|
for initialized || rows.Next() {
|
||
|
|
prepareValues(values, db, columnTypes, columns)
|
||
|
|
|
||
|
|
initialized = false
|
||
|
|
db.RowsAffected++
|
||
|
|
db.AddError(rows.Scan(values...))
|
||
|
|
|
||
|
|
mapValue := map[string]interface{}{}
|
||
|
|
scanIntoMap(mapValue, values, columns)
|
||
|
|
if values, ok := dest.([]map[string]interface{}); ok {
|
||
|
|
values = append(values, mapValue)
|
||
|
|
} else if values, ok := dest.(*[]map[string]interface{}); ok {
|
||
|
|
*values = append(*values, mapValue)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
case *int, *int8, *int16, *int32, *int64,
|
||
|
|
*uint, *uint8, *uint16, *uint32, *uint64, *uintptr,
|
||
|
|
*float32, *float64,
|
||
|
|
*bool, *string, *time.Time,
|
||
|
|
*sql.NullInt32, *sql.NullInt64, *sql.NullFloat64,
|
||
|
|
*sql.NullBool, *sql.NullString, *sql.NullTime:
|
||
|
|
for initialized || rows.Next() {
|
||
|
|
initialized = false
|
||
|
|
db.RowsAffected++
|
||
|
|
db.AddError(rows.Scan(dest))
|
||
|
|
}
|
||
|
|
default:
|
||
|
|
var (
|
||
|
|
fields = make([]*schema.Field, len(columns))
|
||
|
|
joinFields [][2]*schema.Field
|
||
|
|
sch = db.Statement.Schema
|
||
|
|
reflectValue = db.Statement.ReflectValue
|
||
|
|
)
|
||
|
|
|
||
|
|
if reflectValue.Kind() == reflect.Interface {
|
||
|
|
reflectValue = reflectValue.Elem()
|
||
|
|
}
|
||
|
|
|
||
|
|
reflectValueType := reflectValue.Type()
|
||
|
|
switch reflectValueType.Kind() {
|
||
|
|
case reflect.Array, reflect.Slice:
|
||
|
|
reflectValueType = reflectValueType.Elem()
|
||
|
|
}
|
||
|
|
isPtr := reflectValueType.Kind() == reflect.Ptr
|
||
|
|
if isPtr {
|
||
|
|
reflectValueType = reflectValueType.Elem()
|
||
|
|
}
|
||
|
|
|
||
|
|
if sch != nil {
|
||
|
|
if reflectValueType != sch.ModelType && reflectValueType.Kind() == reflect.Struct {
|
||
|
|
sch, _ = schema.Parse(db.Statement.Dest, db.cacheStore, db.NamingStrategy)
|
||
|
|
}
|
||
|
|
|
||
|
|
for idx, column := range columns {
|
||
|
|
if field := sch.LookUpField(column); field != nil && field.Readable {
|
||
|
|
fields[idx] = field
|
||
|
|
} else if names := strings.Split(column, "__"); len(names) > 1 {
|
||
|
|
if rel, ok := sch.Relationships.Relations[names[0]]; ok {
|
||
|
|
if field := rel.FieldSchema.LookUpField(strings.Join(names[1:], "__")); field != nil && field.Readable {
|
||
|
|
fields[idx] = field
|
||
|
|
|
||
|
|
if len(joinFields) == 0 {
|
||
|
|
joinFields = make([][2]*schema.Field, len(columns))
|
||
|
|
}
|
||
|
|
joinFields[idx] = [2]*schema.Field{rel.Field, field}
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
}
|
||
|
|
values[idx] = &sql.RawBytes{}
|
||
|
|
} else {
|
||
|
|
values[idx] = &sql.RawBytes{}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if len(columns) == 1 {
|
||
|
|
// isPluck
|
||
|
|
if _, ok := reflect.New(reflectValueType).Interface().(sql.Scanner); (reflectValueType != sch.ModelType && ok) || // is scanner
|
||
|
|
reflectValueType.Kind() != reflect.Struct || // is not struct
|
||
|
|
sch.ModelType.ConvertibleTo(schema.TimeReflectType) { // is time
|
||
|
|
sch = nil
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
switch reflectValue.Kind() {
|
||
|
|
case reflect.Slice, reflect.Array:
|
||
|
|
var elem reflect.Value
|
||
|
|
|
||
|
|
if !update || reflectValue.Len() == 0 {
|
||
|
|
update = false
|
||
|
|
db.Statement.ReflectValue.Set(reflect.MakeSlice(reflectValue.Type(), 0, 20))
|
||
|
|
}
|
||
|
|
|
||
|
|
for initialized || rows.Next() {
|
||
|
|
BEGIN:
|
||
|
|
initialized = false
|
||
|
|
|
||
|
|
if update {
|
||
|
|
if int(db.RowsAffected) >= reflectValue.Len() {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
elem = reflectValue.Index(int(db.RowsAffected))
|
||
|
|
if onConflictDonothing {
|
||
|
|
for _, field := range fields {
|
||
|
|
if _, ok := field.ValueOf(elem); !ok {
|
||
|
|
db.RowsAffected++
|
||
|
|
goto BEGIN
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
elem = reflect.New(reflectValueType)
|
||
|
|
}
|
||
|
|
|
||
|
|
db.scanIntoStruct(sch, rows, elem, values, columns, fields, joinFields)
|
||
|
|
|
||
|
|
if !update {
|
||
|
|
if isPtr {
|
||
|
|
reflectValue = reflect.Append(reflectValue, elem)
|
||
|
|
} else {
|
||
|
|
reflectValue = reflect.Append(reflectValue, elem.Elem())
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if !update {
|
||
|
|
db.Statement.ReflectValue.Set(reflectValue)
|
||
|
|
}
|
||
|
|
case reflect.Struct, reflect.Ptr:
|
||
|
|
if initialized || rows.Next() {
|
||
|
|
db.scanIntoStruct(sch, rows, reflectValue, values, columns, fields, joinFields)
|
||
|
|
}
|
||
|
|
default:
|
||
|
|
db.AddError(rows.Scan(dest))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if err := rows.Err(); err != nil && err != db.Error {
|
||
|
|
db.AddError(err)
|
||
|
|
}
|
||
|
|
|
||
|
|
if db.RowsAffected == 0 && db.Statement.RaiseErrorOnNotFound && db.Error == nil {
|
||
|
|
db.AddError(ErrRecordNotFound)
|
||
|
|
}
|
||
|
|
}
|