Exemplo n.º 1
0
func Delete(db DBer, table string, pkCols []string, items ...SQLer) error {
	itemLen := len(items)
	if itemLen == 0 {
		return nil
	}
	var query string
	if len(pkCols) == 1 {
		query, _ = sq.DELETE(table).WHERE(sq.EQ(pkCols[0], nil)).Compile()
	} else {
		conds := make([]sq.Condition, len(pkCols))
		for i, pk := range pkCols {
			conds[i] = sq.EQ(pk, nil)
		}
		query, _ = sq.DELETE(table).WHERE(sq.AND(conds...)).Compile()
	}
	stmt, err := db.Prepare(query)
	if my, bad := Check(err, "delete prepare failure", "query", query); bad {
		return my
	}
	defer stmt.Close()
	for i, item := range items {
		args, err := ColVals(item, pkCols)
		if my, bad := Check(err, "delete colvals failure", "index", i, "query", query, "pkCols", pkCols); bad {
			return my
		}
		res, err := stmt.Exec(args...)
		if my, bad := Check(err, "delete exec failure", "index", i, "query", query, "args", args); bad {
			return my
		}
		aff, err := res.RowsAffected()
		if my, bad := Check(err, "delete rows affected failure", "index", i, "query", query, "args", args); bad {
			return my
		}
		if aff != 1 {
			my, _ := Check(fmt.Errorf("inadequate rows affected %v", aff), "delete rows affected failure", "index", i, "query", query, "args", args, "affected", aff)
			return my
		}
	}
	return nil
}
Exemplo n.º 2
0
func Delete(d db.DBer, group DeleteGrouper) error {
	sqlers := group.DeleteList()
	if len(sqlers) == 0 {
		return nil
	}
	table := group.SQLTable()
	pkCols := group.PKCols()
	query, _ := sq.DELETE(table).WHERE(WherePK(pkCols)).Compile()
	argList := make([][]interface{}, len(sqlers))
	var err error
	for i, item := range sqlers {
		argList[i], err = ColVals(item, pkCols)
		if my, bad := Check(err, "delete failure on Colvals pkcols", "pkCols", pkCols, "index", i); bad {
			return my
		}
	}
	return db.Exec(d, true, query, argList...)
}
Exemplo n.º 3
0
func DeleteWhere(d db.DBer, table string, where sq.Condition) error {
	query, args := sq.DELETE(table).WHERE(where).Compile()
	return db.Exec(d, false, query, args)
}