func (d *Driver) indexName(m driver.Model, idx *index.Index) (string, error) {
if len(idx.Fields) == 0 {
return "", fmt.Errorf("index on %v has no fields", m.Type())
}
buf := getBuffer()
buf.WriteString(m.Table())
for _, v := range idx.Fields {
dbName, _, err := m.Map(v)
if err != nil {
return "", err
}
buf.WriteByte('_')
// dbName is quoted and includes the table name
// extract the unquoted field name.
buf.WriteString(unquote(dbName))
if DescField(idx, v) {
buf.WriteString("_desc")
}
}
s := buf.String()
putBuffer(buf)
return s, nil
}