fix: let sqlc output nullable array

Close #1851

This allow postgres to output nullable array.

Author: babariviere

examples/ondeck/postgresql/models.go

@@ -22,6 +22,7 @@ type Options struct {
 	EmitParamsStructPointers    bool              `json:"emit_params_struct_pointers" yaml:"emit_params_struct_pointers"`
 	EmitMethodsWithDbArgument   bool              `json:"emit_methods_with_db_argument,omitempty" yaml:"emit_methods_with_db_argument"`
 	EmitPointersForNullTypes    bool              `json:"emit_pointers_for_null_types" yaml:"emit_pointers_for_null_types"`
+	EmitNullableForNullArrays   bool              `json:"emit_nullable_for_null_arrays" yaml:"emit_nullable_for_null_arrays"`
 	EmitEnumValidMethod         bool              `json:"emit_enum_valid_method,omitempty" yaml:"emit_enum_valid_method"`
 	EmitAllEnumValues           bool              `json:"emit_all_enum_values,omitempty" yaml:"emit_all_enum_values"`
 	EmitSqlAsComment            bool              `json:"emit_sql_as_comment,omitempty" yaml:"emit_sql_as_comment"`

examples/ondeck/postgresql/venue.sql.go

@@ -36,7 +36,7 @@ func parseIdentifierString(name string) (*plugin.Identifier, error) {
 
 func postgresType(req *plugin.GenerateRequest, options *opts.Options, col *plugin.Column) string {
 	columnType := sdk.DataType(col.Type)
-	notNull := col.NotNull || col.IsArray
+	notNull := col.NotNull || (col.IsArray && !options.EmitNullableForNullArrays)
 	driver := parseDriver(options.SqlPackage)
 	emitPointersForNull := driver.IsPGX() && options.EmitPointersForNullTypes
 

internal/codegen/golang/opts/options.go

@@ -39,6 +39,7 @@ type v1PackageSettings struct {
 	EmitParamsStructPointers  bool              `json:"emit_params_struct_pointers" yaml:"emit_params_struct_pointers"`
 	EmitMethodsWithDBArgument bool              `json:"emit_methods_with_db_argument" yaml:"emit_methods_with_db_argument"`
 	EmitPointersForNullTypes  bool              `json:"emit_pointers_for_null_types" yaml:"emit_pointers_for_null_types"`
+	EmitNullableForNullArrays bool              `json:"emit_nullable_for_null_arrays" yaml:"emit_nullable_for_null_arrays"`
 	EmitEnumValidMethod       bool              `json:"emit_enum_valid_method,omitempty" yaml:"emit_enum_valid_method"`
 	EmitAllEnumValues         bool              `json:"emit_all_enum_values,omitempty" yaml:"emit_all_enum_values"`
 	EmitSqlAsComment          bool              `json:"emit_sql_as_comment,omitempty" yaml:"emit_sql_as_comment"`
@@ -149,6 +150,7 @@ func (c *V1GenerateSettings) Translate() Config {
 					EmitParamsStructPointers:  pkg.EmitParamsStructPointers,
 					EmitMethodsWithDbArgument: pkg.EmitMethodsWithDBArgument,
 					EmitPointersForNullTypes:  pkg.EmitPointersForNullTypes,
+					EmitNullableForNullArrays: pkg.EmitNullableForNullArrays,
 					EmitEnumValidMethod:       pkg.EmitEnumValidMethod,
 					EmitAllEnumValues:         pkg.EmitAllEnumValues,
 					EmitSqlAsComment:          pkg.EmitSqlAsComment,

internal/codegen/golang/postgresql_type.go

@@ -0,0 +1,9 @@
+-- name: CreateMemories :many
+INSERT INTO memories (vampire_id)
+SELECT
+    unnest(sqlc.narg(vamprie_id)::uuid[]) AS vampire_id
+RETURNING
+    *;
+
+-- name: GetVampireIDs :many
+SELECT vampires.id::uuid FROM unnest(sqlc.narg(vampire_id)::uuid[]) AS vampires (id);