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feat(bun): generate native Go array slices for PostgreSQL array columns

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Bun's pgdialect scans/appends native slices directly, so array columns
(text[], integer[], uuid[], ...) always generate as plain []string,
[]int32, etc. with an explicit "array" bun tag, regardless of --types
(sqltypes/stdlib/baselib). The SqlXxxArray wrapper types are no longer
used for Bun array columns (gorm is unaffected and keeps using them).

Adds --array-nullable pointer_slice to represent nullable array columns
as *[]T instead of []T, so callers can distinguish SQL NULL (nil) from
'{}' (pointer to an empty slice). Verified end-to-end against a live
PostgreSQL instance for NULL/{}/populated arrays in every --types mode.

Closes #13
This commit is contained in:
Hein
2026-07-21 12:41:38 +02:00
parent 2cecb4c11c
commit 5d9ff5df03
65 changed files with 9584 additions and 167 deletions
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cmd/relspec/convert.go
+5 -3
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@@ -54,6 +54,7 @@ var (
convertSchemaFilter string
convertFlattenSchema bool
convertNullableTypes string
convertNullableArrays string
convertContinueOnError bool
convertExtraFields string
)
@@ -180,6 +181,7 @@ func init() {
convertCmd.Flags().StringVar(&convertSchemaFilter, "schema", "", "Filter to a specific schema by name (required for formats like dctx that only support single schemas)")
convertCmd.Flags().BoolVar(&convertFlattenSchema, "flatten-schema", false, "Flatten schema.table names to schema_table (useful for databases like SQLite that do not support schemas)")
convertCmd.Flags().StringVar(&convertNullableTypes, "types", "", "Nullable type package for code-gen writers (bun/gorm): 'baselib' (default, Go pointer types), 'stdlib' (database/sql), or 'sqltypes'")
convertCmd.Flags().StringVar(&convertNullableArrays, "array-nullable", "", "Nullable PostgreSQL array representation for the Bun writer in stdlib/baselib --types mode: 'slice' (default, plain slice) or 'pointer_slice' (*[]T, distinguishes NULL from '{}')")
convertCmd.Flags().BoolVar(&convertContinueOnError, "continue-on-error", false, "Prepend \\set ON_ERROR_STOP off to generated SQL so psql continues past errors (pgsql output only)")
convertCmd.Flags().StringVar(&convertExtraFields, "extra-fields", "", "Path to JSON file containing extra Bun model fields to inject (bun output only); fields support target_table, name, type, bun_tag, json_tag, comment")
@@ -248,7 +250,7 @@ func runConvert(cmd *cobra.Command, args []string) error {
fmt.Fprintf(os.Stderr, " Schema: %s\n", convertSchemaFilter)
}
if err := writeDatabase(db, convertTargetType, convertTargetPath, convertPackageName, convertSchemaFilter, convertFlattenSchema, convertNullableTypes, convertContinueOnError, convertExtraFields); err != nil {
if err := writeDatabase(db, convertTargetType, convertTargetPath, convertPackageName, convertSchemaFilter, convertFlattenSchema, convertNullableTypes, convertNullableArrays, convertContinueOnError, convertExtraFields); err != nil {
return fmt.Errorf("failed to write target: %w", err)
}
@@ -388,10 +390,10 @@ func readDatabaseForConvert(dbType, filePath, connString string) (*models.Databa
return db, nil
}
func writeDatabase(db *models.Database, dbType, outputPath, packageName, schemaFilter string, flattenSchema bool, nullableTypes string, continueOnError bool, extraFields string) error {
func writeDatabase(db *models.Database, dbType, outputPath, packageName, schemaFilter string, flattenSchema bool, nullableTypes, nullableArrays string, continueOnError bool, extraFields string) error {
var writer writers.Writer
writerOpts := newWriterOptions(outputPath, packageName, flattenSchema, nullableTypes, continueOnError)
writerOpts := newWriterOptions(outputPath, packageName, flattenSchema, nullableTypes, nullableArrays, continueOnError)
if extraFields != "" {
if !strings.EqualFold(dbType, "bun") {
return fmt.Errorf("--extra-fields is only supported for Bun output")