LIVO

LIVO — Live Objects
A reactive object-relationship state management system for Flutter with field-level, object-level, and relationship-based reactivity.

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🧠 What is LIVO?

LIVO (Live Objects) is a model-driven state management solution for Flutter.

Instead of managing state through providers, streams, or immutable snapshots, LIVO treats your Dart objects as live state.

• Objects hold state
• Fields are reactive
• Relationships propagate changes automatically
• UI stays in sync with minimal boilerplate

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✨ Core Philosophy

• Models are plain Dart objects
• State changes happen via normal field mutation
• UI reacts automatically
• No ChangeNotifier, providers, streams, or boilerplate
• Supports:
  • Object-level reactivity
  • Field-level reactivity
  • Nested & shared models
  • One → Many and Many ↔ Many relationships

Think of LIVO as Live, connected objects driving your UI

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✨ Features

• ✅ Reactive models with automatic UI updates
• ✅ Object-wise reactivity (watch)
• ✅ Field-wise reactivity (watchField)
• ✅ Computed / derived reactivity (watchComputed)
• ✅ ReactiveList & ReactiveMap
• ✅ Nested & shared models
• ✅ One → Many and Many ↔ Many relationships
• ✅ Debug inspection support
• ✅ Minimal boilerplate
• ✅ No code generation required

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🚀 Installation:

dependencies:
  livo: <latest_version>

🧠 How LIVO Thinks About State (vs Others)

Dimension	LIVO	Provider	Riverpod	BLoC
Core Philosophy	State is live domain objects	State is exposed objects	State is immutable values from providers	State is a stream of events → states
Mental Model	“Objects change → UI reacts”	“Object notifies listeners”	“State is derived & recomputed”	“Events produce new states”
Where State Lives	Inside models themselves	In ChangeNotifiers / objects	Inside providers	Inside blocs
Mutation Style	Direct mutation of fields	Direct mutation	Usually immutable	Immutable states
How UI Updates	Field/object watchers react automatically	notifyListeners()	Provider invalidation & recompute	Stream emits new state
Granularity	Field-level & object-level	Object-level	Provider-level (can be fine-grained)	Whole-state
Relationship Handling	First-class (nested, graph-based)	Manual wiring	Derived providers	Manual orchestration
Boilerplate Level	Low	Low–Medium	Medium	High
Explicitness	Implicit reactivity	Semi-explicit	Explicit dependencies	Very explicit
Debugging Style	Track who changed what	Track notifier calls	Track provider invalidation	Event/state logs
Async Handling	Model-centric async	Manual	First-class (FutureProvider)	First-class
Side Effects	Model-driven	Manual	Controlled	Event-driven
Testability	High (plain Dart models)	High	Very high	Very high
Learning Curve	Medium (new paradigm)	Low	Medium–High	High
Best Fit	Domain-heavy, relational apps	Simple reactive UI	Data-driven apps	Complex workflows
Worst Fit	Global config / DI	Large reactive graphs	Heavy mutation workflows	Simple CRUD apps

🧩 One-Line Thinking Differences

Framework	How It Thinks
LIVO	“My objects are alive.”
Provider	“Notify when something changes.”
Riverpod	“State is a computed value.”
BLoC	“Events drive state transitions.”

🎯 Key Differentiator of LIVO LIVO treats your domain model as the state system itself. There is no separate state layer — the model is the state.

• Where others wrap state, LIVO animates the object graph.

🧩 Basic Example:

import 'package:livo/livo.dart';

class Task extends ReactiveModel {
  String _title;
  bool _completed = false;

  Task(this._title);

  String get title => _title;
  set title(String value) {
    _title = value;
    notifyListeners(#title);
  }

  bool get completed => _completed;
  set completed(bool value) {
    _completed = value;
    notifyListeners(#completed);
  }
}

🔗 Relationships

• One → Many

class Dashboard extends ReactiveModel {
  final List<Task> tasks;

  Dashboard(this.tasks) {
    for (final t in tasks) addNested(t);
  }
}

• Many ↔ Many

class Group extends ReactiveModel {
  final String name;
  final List<Task> tasks;

  Group(this.name, this.tasks) {
    for (final t in tasks) addNested(t);
  }
}

🧭 Why LIVO?

Traditional State	LIVO
External stores	State lives in objects
Boilerplate	Minimal
Manual wiring	Automatic propagation
Flat state	Connected object graph

🔄 Migration Notice:

This package replaces reactive_orm.

reactive_orm has been deprecated and rebranded as LIVO to remove ORM/database confusion and better reflect its purpose as a state management system.

Migration is simple:

- import 'package:reactive_orm/reactive_orm.dart';
+ import 'package:livo/livo.dart';

📌 Summary:

LIVO is ideal for:

• Model-centric Flutter apps
• Fine-grained UI reactivity
• Complex domain models with relationships
• Clean architecture with minimal overhead