strint library

Safe JSON models — avoid UI crashes when the backend sends wrong types.

Use CreateModel spec + code generation to get freezed models with Safe* converters. When the API returns e.g. int for a field you expected as String?, the converter returns null instead of throwing.

1. Define models (YAML)

Create strint_models.yaml in your project:

ReportModel:
  id: int?
  dollar_rate: String?

2. Generate Dart code

dart run strint:generate

Then run build_runner for freezed:

dart run build_runner build --delete-conflicting-outputs

Classes

SafeBool

SafeDateTime

ISO8601 DateTime ("2026-01-29T12:34:56Z" or with offset)

SafeDouble

SafeEnum<T extends Enum>

=============================== ENUM (supports String name or int index)

SafeInt

SafeMap

=============================== MAP

SafeObject<T>

=============================== OBJECT (Model)

SafeObjectList<T>

LIST of objects (models)

SafePrimitiveList<T>

=============================== LIST of primitive

SafeString

=============================== PRIMITIVES

Functions

CreateModel(String modelName, Map<String, String> fields) → String

Generates the freezed + Safe* model Dart source.

generateModel({required String modelName, required Map<String, String> fields, String safeJsonImport = "package:strint/safe_json.dart", String freezedImport = "package:freezed_annotation/freezed_annotation.dart", String jsonKeyImport = "package:json_annotation/json_annotation.dart"}) → String

Generates the Dart source for a single freezed model.

resolveType(String typeKey) → (String, String)

Resolves Dart type and Safe converter annotation for a type string. Returns (dartType, converterName) e.g. ("int?", "SafeInt").

snakeCaseFileName(String modelName) → String

snakeToCamel(String s) → String

Converts snake_case to camelCase.