Mike Schwörer
7d64f18f54
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72 lines
1.5 KiB
Go
72 lines
1.5 KiB
Go
package sq
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import (
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"fmt"
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"gogs.mikescher.com/BlackForestBytes/goext/exerr"
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"reflect"
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"strings"
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)
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func BuildUpdateStatement(q Queryable, tableName string, obj any, idColumn string) (string, PP, error) {
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rval := reflect.ValueOf(obj)
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rtyp := rval.Type()
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params := PP{}
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setClauses := make([]string, 0)
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matchClause := ""
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for i := 0; i < rtyp.NumField(); i++ {
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rsfield := rtyp.Field(i)
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rvfield := rval.Field(i)
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if !rsfield.IsExported() {
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continue
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}
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columnName := rsfield.Tag.Get("db")
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if columnName == "" || columnName == "-" {
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continue
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}
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if idColumn == columnName {
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idValue, err := convertValueToDB(q, rvfield.Interface())
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if err != nil {
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return "", nil, err
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}
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matchClause = fmt.Sprintf("(%s = :%s)", columnName, params.Add(idValue))
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continue
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}
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if rsfield.Type.Kind() == reflect.Ptr && rvfield.IsNil() {
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setClauses = append(setClauses, fmt.Sprintf("%s = NULL", columnName))
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} else {
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val, err := convertValueToDB(q, rvfield.Interface())
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if err != nil {
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return "", nil, err
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}
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setClauses = append(setClauses, fmt.Sprintf("%s = :%s", columnName, params.Add(val)))
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}
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}
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if len(setClauses) == 0 {
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return "", nil, exerr.New(exerr.TypeSQLBuild, "no updates clauses found in object").Build()
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}
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if matchClause == "" {
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return "", nil, exerr.New(exerr.TypeSQLBuild, "id column not found in object").Build()
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}
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//goland:noinspection SqlNoDataSourceInspection
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return fmt.Sprintf("UPDATE %s SET %s WHERE %s", tableName, strings.Join(setClauses, ", "), matchClause), params, nil
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}
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