ember-model-validator
An Ember addon that adds Active Record-style validations to Ember Data models with a simple, declarative API.
What is ember-model-validator?
Ember model validator is an Ember addon that provides validation support for Ember Data models. It allows developers to define validation rules directly within their models using a declarative syntax similar to Ruby on Rails' Active Record validations. The addon solves the problem of adding robust validation to Ember applications without creating complex validation structures or multiple files.
Ember.js developers building applications with Ember Data who need to validate model data before persistence. Particularly useful for teams familiar with Rails-style validations or those seeking a simple, integrated validation solution.
Developers choose Ember model validator because it integrates seamlessly with Ember Data, offers a clean declarative API, and provides a comprehensive set of validators without requiring additional dependencies. Its synchronous validation approach and support for both models and plain objects make it versatile for various validation scenarios.
Overview
ember-cli addon adds validation support to your Ember-Data models.
Use Cases
Best For
- Adding Rails-style validations to Ember Data models
- Validating form data before saving to the backend
- Creating reusable validation logic across models
- Implementing complex validation rules with custom validators
- Building Ember applications with internationalized validation messages
- Validating non-model objects like components or controllers
Not Ideal For
- Projects using React, Vue, or other non-Ember frontend frameworks
- Applications requiring asynchronous validation for real-time form feedback
- Teams relying on server-side validation via JSON Schema or GraphQL directives
- Large-scale apps needing complex, cross-field validation with dynamic dependencies
Pros & Cons
Pros
Offers a straightforward, declarative way to define validations directly in models, similar to Ruby on Rails, reducing boilerplate and simplifying setup for Ember developers.
Includes a wide range of validators like presence, length, email, numericality, date, and custom functions, covering most common validation needs without additional dependencies.
Supports validating specific attributes using 'only' or 'except' options, allowing targeted validation in different contexts, such as partial saves or conditional checks.
Provides support for multiple locales including English, Spanish, French, and Portuguese, with configurable default locale via environment settings, easing globalization efforts.
Includes TypeScript definitions for type-safe validation configurations, enhancing developer experience and reducing errors in TypeScript-based Ember projects.
Cons
The validate() method is synchronous, which can block UI threads and isn't suitable for asynchronous validation scenarios, such as real-time API checks, without custom wrappers.
Tightly integrated with Ember and Ember Data, making it unusable outside Ember projects or with alternative data layers, limiting flexibility in mixed-technology stacks.
Lacks built-in support for complex validations like cross-field dependencies or conditional validation chains, requiring manual implementation via custom validators, which can increase code complexity.
Requires Ember v3.28 or above, which may force upgrades or create barriers for legacy Ember applications, as noted in the README's compatibility section.
Frequently Asked Questions
Related Projects
ember-cp-validationsEmber computed property based validations
ember-changeset-validationsValidations for ember-changeset
ember-validated-formEasily create forms with client side validations.
ember-line-graphZero-dependency ember-addon to draw line-charts
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