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feat: add --types flag and stdlib nullable type support for bun/gorm writers

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* Fix pgsql reader double-quoting defaults: normalizePostgresDefault strips
  surrounding SQL string literal quotes from column_default before storing,
  matching the convention used by every other reader.

* Add NullableTypes field to WriterOptions with NullableTypeResolveSpec
  (default) and NullableTypeStdlib constants.

* Both bun and gorm TypeMappers now accept a typeStyle parameter. stdlib
  mode produces sql.NullString/NullInt32/NullTime etc. for nullable scalars,
  plain Go slices for arrays, and time.Time for NOT NULL timestamps. Default
  resolvespec behaviour is unchanged.

* Add --types flag to convert and split commands.

* Update bun/README.md and gorm/README.md with side-by-side generated code
  examples, updated type mapping tables, and Writer Options documentation.
This commit is contained in:
Hein
2026-04-30 16:00:54 +02:00
parent 1e54fdcd7f
commit 3524e86282
12 changed files with 562 additions and 126 deletions
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10
pkg/writers/gorm/writer.go
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@@ -24,7 +24,7 @@ type Writer struct {
func NewWriter(options *writers.WriterOptions) *Writer {
w := &Writer{
options: options,
typeMapper: NewTypeMapper(),
typeMapper: NewTypeMapper(options.NullableTypes),
config: LoadMethodConfigFromMetadata(options.Metadata),
}
@@ -77,8 +77,8 @@ func (w *Writer) writeSingleFile(db *models.Database) error {
packageName := w.getPackageName()
templateData := NewTemplateData(packageName, w.config)
// Add sql_types import (always needed for nullable types)
templateData.AddImport(fmt.Sprintf("sql_types \"%s\"", w.typeMapper.GetSQLTypesImport()))
// Add nullable types import (resolvespec or stdlib depending on options)
templateData.AddImport(w.typeMapper.GetNullableTypeImportLine())
// Collect all models
for _, schema := range db.Schemas {
@@ -171,8 +171,8 @@ func (w *Writer) writeMultiFile(db *models.Database) error {
// Create template data for this single table
templateData := NewTemplateData(packageName, w.config)
// Add sql_types import
templateData.AddImport(fmt.Sprintf("sql_types \"%s\"", w.typeMapper.GetSQLTypesImport()))
// Add nullable types import (resolvespec or stdlib depending on options)
templateData.AddImport(w.typeMapper.GetNullableTypeImportLine())
// Create model data
modelData := NewModelData(table, schema.Name, w.typeMapper, w.options.FlattenSchema)