// Appends an item (map or struct) into the collection.
func (self *table) Append(item interface{}) (interface{}, error) {
var pKey string
var columns sqlgen.Columns
var values sqlgen.Values
var arguments []interface{}
var id int64
cols, vals, err := self.FieldValues(item, toInternal)
if err != nil {
return nil, err
}
columns = make(sqlgen.Columns, 0, len(cols))
for i := range cols {
columns = append(columns, sqlgen.Column{cols[i]})
}
arguments = make([]interface{}, 0, len(vals))
values = make(sqlgen.Values, 0, len(vals))
for i := range vals {
switch v := vals[i].(type) {
case sqlgen.Value:
// Adding value.
values = append(values, v)
default:
// Adding both value and placeholder.
values = append(values, sqlPlaceholder)
arguments = append(arguments, v)
}
}
if pKey, err = self.source.getPrimaryKey(self.tableN(0)); err != nil {
if err != sql.ErrNoRows {
// Can't tell primary key.
return nil, err
}
}
stmt := sqlgen.Statement{
Type: sqlgen.SqlInsert,
Table: sqlgen.Table{self.tableN(0)},
Columns: columns,
Values: values,
}
if pKey == "" {
// No primary key found.
var res sql.Result
if res, err = self.source.doExec(stmt, arguments...); err != nil {
return nil, err
}
// Attempt to use LastInsertId() (probably won't work, but the exec()
// succeeded, so the error from LastInsertId() is ignored).
id, _ = res.LastInsertId()
return id, nil
} else {
var row *sql.Row
// A primary key was found.
stmt.Extra = sqlgen.Extra(fmt.Sprintf(`RETURNING "%s"`, pKey))
if row, err = self.source.doQueryRow(stmt, arguments...); err != nil {
return nil, err
}
// Retrieving key value.
if err = row.Scan(&id); err != nil {
if err == sql.ErrNoRows {
// Can't tell the row's id. Maybe there isn't any?
return nil, nil
}
// Other kind of error.
return nil, err
}
return id, nil
}
return nil, nil
}
// Appends an item (map or struct) into the collection.
func (t *table) Append(item interface{}) (interface{}, error) {
var pKey []string
var columns sqlgen.Columns
var values sqlgen.Values
var arguments []interface{}
//var id []interface{}
cols, vals, err := t.FieldValues(item, toInternal)
if err != nil {
return nil, err
}
columns = make(sqlgen.Columns, 0, len(cols))
for i := range cols {
columns = append(columns, sqlgen.Column{cols[i]})
}
arguments = make([]interface{}, 0, len(vals))
values = make(sqlgen.Values, 0, len(vals))
for i := range vals {
switch v := vals[i].(type) {
case sqlgen.Value:
// Adding value.
values = append(values, v)
default:
// Adding both value and placeholder.
values = append(values, sqlPlaceholder)
arguments = append(arguments, v)
}
}
if pKey, err = t.source.getPrimaryKey(t.tableN(0)); err != nil {
if err != sql.ErrNoRows {
// Can't tell primary key.
return nil, err
}
}
stmt := sqlgen.Statement{
Type: sqlgen.SqlInsert,
Table: sqlgen.Table{t.tableN(0)},
Columns: columns,
Values: values,
}
// No primary keys defined.
if len(pKey) == 0 {
var res sql.Result
if res, err = t.source.doExec(stmt, arguments...); err != nil {
return nil, err
}
// Attempt to use LastInsertId() (probably won't work, but the exec()
// succeeded, so the error from LastInsertId() is ignored).
lastID, _ := res.LastInsertId()
return lastID, nil
}
var rows *sql.Rows
// A primary key was found.
stmt.Extra = sqlgen.Extra(fmt.Sprintf(`RETURNING "%s"`, strings.Join(pKey, `", "`)))
if rows, err = t.source.doQuery(stmt, arguments...); err != nil {
return nil, err
}
defer rows.Close()
var keyMap map[string]interface{}
err = sqlutil.FetchRow(rows, &keyMap)
// Does the item satisfy the db.IDSetter interface?
if setter, ok := item.(db.IDSetter); ok {
if err := setter.SetID(keyMap); err != nil {
return nil, err
}
return nil, nil
}
// The IDSetter interface does not match, we'll be looking for another
// interface match.
if len(keyMap) == 1 {
id := keyMap[pKey[0]]
// Matches db.Int64IDSetter
if setter, ok := item.(db.Int64IDSetter); ok {
if err = setter.SetID(to.Int64(id)); err != nil {
return nil, err
}
return nil, nil
}
// Matches db.Uint64IDSetter
if setter, ok := item.(db.Uint64IDSetter); ok {
if err = setter.SetID(to.Uint64(id)); err != nil {
return nil, err
}
return nil, nil
}
// No interface matched, falling back to old behaviour.
return to.Int64(id), nil
}
// More than one key, no interface matched, let's return a map.
return keyMap, nil
}