forked from mirror/gorm
115 lines
2.2 KiB
Go
115 lines
2.2 KiB
Go
package gorm
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import (
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"errors"
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"fmt"
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"reflect"
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"strconv"
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"strings"
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)
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func (s *Orm) explain(value interface{}, operation string) *Orm {
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s.setModel(value)
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switch operation {
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case "Save":
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s.saveSql(value)
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case "Delete":
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s.deleteSql(value)
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case "Query":
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s.querySql(value)
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case "CreateTable":
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s.createTableSql(value)
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}
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return s
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}
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func (s *Orm) querySql(out interface{}) {
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s.Sql = fmt.Sprintf("SELECT * FROM %v %v", s.TableName, s.whereSql())
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return
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}
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func (s *Orm) query(out interface{}) {
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var (
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is_slice bool
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dest_type reflect.Type
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)
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dest_out := reflect.Indirect(reflect.ValueOf(out))
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if x := dest_out.Kind(); x == reflect.Slice {
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is_slice = true
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dest_type = dest_out.Type().Elem()
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}
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rows, err := s.db.Query(s.Sql, s.SqlVars...)
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defer rows.Close()
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s.Error = err
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if rows.Err() != nil {
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s.Error = rows.Err()
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}
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counts := 0
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for rows.Next() {
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counts += 1
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var dest reflect.Value
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if is_slice {
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dest = reflect.New(dest_type).Elem()
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} else {
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dest = reflect.ValueOf(out).Elem()
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}
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columns, _ := rows.Columns()
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var values []interface{}
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for _, value := range columns {
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values = append(values, dest.FieldByName(snakeToUpperCamel(value)).Addr().Interface())
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}
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s.Error = rows.Scan(values...)
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}
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if (counts == 0) && !is_slice {
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s.Error = errors.New("Record not found!")
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}
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}
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func (s *Orm) saveSql(value interface{}) {
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columns, values := s.Model.ColumnsAndValues()
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s.Sql = fmt.Sprintf(
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"INSERT INTO \"%v\" (%v) VALUES (%v)",
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s.TableName,
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strings.Join(quoteMap(columns), ","),
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valuesToBinVar(values),
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)
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s.SqlVars = values
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return
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}
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func (s *Orm) deleteSql(value interface{}) {
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s.Sql = fmt.Sprintf("DELETE FROM %v WHERE %v", s.TableName, s.whereSql)
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return
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}
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func (s *Orm) whereSql() (sql string) {
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if len(s.whereClause) == 0 {
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return
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} else {
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sql = "WHERE "
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for _, clause := range s.whereClause {
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sql += clause["query"].(string)
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args := clause["args"].([]interface{})
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for _, arg := range args {
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s.SqlVars = append(s.SqlVars, arg.([]interface{})...)
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sql = strings.Replace(sql, "?", "$"+strconv.Itoa(len(s.SqlVars)), 1)
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}
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}
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}
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return
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}
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func (s *Orm) createTableSql(value interface{}) {
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s.Sql = fmt.Sprintf(
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"CREATE TABLE \"%v\" (%v)",
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s.TableName,
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"",
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)
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return
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}
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