PostgresExt-Serializers

Note: Current release is AMS 0.8.x compatible

There will be updates coming to make it 0.9.x compatible

Looking for help?

If it is a bug please open an issue on Github. If you need help using the gem please ask the question on Stack Overflow. Be sure to tag the question with DockYard so we can find it.

Installation

Add this line to your application's Gemfile:

gem 'postgres_ext-serializers'

And then execute:

$ bundle

Or install it yourself as:

$ gem install postgres_ext-serializers

Usage

Just require 'postgres_ext/serializers' and use ActiveModel::Serializers as you normally would! Postgres_ext-serializers will take over anytime you try to serialize an ActiveRecord::Relation.

Methods in Serializers and Models

If you are using methods to compute properties for your JSON responses in your models or serializers, postgres_ext-serializers will try to discover a SQL version of this call by looking for a class method with the same name and the prefex __sql. Here's an example:

class MyModel < ActiveRecord::Base
  def full_name
    "#{object.first_name} #{object.last_name}"
  end

  def self.full_name__sql
    "first_name || ' ' || last_name"
  end
end

class MySerializer < ActiveModel::Serializer
  def full_name
    "#{object.first_name} #{object.last_name}"
  end

  def full_name__sql
    "first_name || ' ' || last_name"
  end
end

There is no instance of MyModel created so sql computed properties needs to be a class method. Right now, this string is used as a SQL literal, so be sure to not use untrusted values in the return value.

Note: Postgres date, timestamp or timestamptz format

Postgres 9.2 and 9.3 by default renders dates according to the current DateStyle Postgres setting, but many JSON processors require dates to be in ISO 8601 format e.g. Firefox or Internet Explorer will parse string as invalid date with default DateStyle setting. Postgres 9.4 onwards now uses ISO 8601 for JSON serialization instead.

Developing

To work on postgres_ext-serializers locally, follow these steps:

1. Run bundle install, this will install (almost) all the development dependencies
2. Run gem install byebug (not a declared dependency to not break CI)
3. Run bundle exec rake setup, this will set up the .env file necessary to run the tests and set up the database
4. Run bundle exec rake db:create, this will create the test database
5. Run bundle exec rake db:migrate, this will set up the database tables required by the test
6. Run BUNDLE_GEMFILE='gemfiles/Gemfile.activerecord-4.0.x' bundle install --quiet to create the Gemfile.lock.
7. Run bundle exec rake test:all to run tests against all supported versions of Active Record (currently only 4.0.x)

Authors

Dan McClain twitter github

We are very thankful for the many contributors

Versioning

This gem follows Semantic Versioning

Want to help?

Please do! We are always looking to improve this gem.

Legal

DockYard, Inc © 2014

@dockyard

Licensed under the MIT license