89 lines
2.0 KiB
Go
89 lines
2.0 KiB
Go
package xorm
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import (
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"database/sql"
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"reflect"
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)
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func newIterator(session *Session, bean interface{}) (*Iterator, error) {
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iterator := new(Iterator)
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iterator.session = session
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iterator.beanType = reflect.Indirect(reflect.ValueOf(bean)).Type()
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err := iterator.session.newDb()
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if err != nil {
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return nil, err
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}
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defer iterator.session.Statement.Init()
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var sql string
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var args []interface{}
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iterator.session.Statement.RefTable = iterator.session.Engine.autoMap(bean)
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if iterator.session.Statement.RawSQL == "" {
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sql, args = iterator.session.Statement.genGetSql(bean)
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} else {
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sql = iterator.session.Statement.RawSQL
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args = iterator.session.Statement.RawParams
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}
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for _, filter := range iterator.session.Engine.Filters {
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sql = filter.Do(sql, session)
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}
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iterator.session.Engine.LogSQL(sql)
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iterator.session.Engine.LogSQL(args)
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iterator.stmt, err = iterator.session.Db.Prepare(sql)
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if err != nil {
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defer iterator.Close()
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return nil, err
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}
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iterator.rows, err = iterator.stmt.Query(args...)
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if err != nil {
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defer iterator.Close()
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return nil, err
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}
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iterator.fields, err = iterator.rows.Columns()
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if err != nil {
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defer iterator.Close()
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return nil, err
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}
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return iterator, nil
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}
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func (iterator *Iterator) NextReuse(bean interface{}) (interface{}, error) {
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if iterator.rows != nil && iterator.rows.Next() {
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result, err := row2map(iterator.rows, iterator.fields) // !nashtsai! TODO remove row2map then scanMapIntoStruct conversation for better performance
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if err == nil {
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err = iterator.session.scanMapIntoStruct(bean, result)
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}
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if err == nil {
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return bean, nil
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} else {
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return nil, err
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}
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}
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return nil, sql.ErrNoRows
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}
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func (iterator *Iterator) Next() (interface{}, error) {
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b := reflect.New(iterator.beanType).Interface()
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return iterator.NextReuse(b)
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}
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func (iterator *Iterator) Close() {
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if iterator.session.IsAutoClose {
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defer iterator.session.Close()
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}
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if iterator.stmt != nil {
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defer iterator.stmt.Close()
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}
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if iterator.rows != nil {
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defer iterator.rows.Close()
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}
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}
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