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Addition of Design and Implementation section to Readme (wrapped) #382

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29 changes: 25 additions & 4 deletions README.md
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@@ -1,4 +1,4 @@
[![Build Status](https://api.travis-ci.org/rails-api/active_model_serializers.png)](https://travis-ci.org/rails-api/active_model_serializers) [![Code Climate](https://codeclimate.com/github/rails-api/active_model_serializers.png)](https://codeclimate.com/github/rails-api/active_model_serializers) [![Coverage Status](https://coveralls.io/repos/rails-api/active_model_serializers/badge.png?branch=master)](https://coveralls.io/r/rails-api/active_model_serializers)
[![Build Status](https://api.travis-ci.org/rails-api/active_model_serializers.png)](https://travis-ci.org/rails-api/active_model_serializers) [![Code Climate](https://codeclimate.com/github/rails-api/active_model_serializers.png)](https://codeclimate.com/github/rails-api/active_model_serializers) [![Coverage Status](https://coveralls.io/repos/rails-api/active_model_serializers/badge.png?branch=master)](https://coveralls.io/r/rails-api/active_model_serializers)

# Purpose

Expand All @@ -13,7 +13,7 @@ content.
In short, **serializers replace hash-driven development with object-oriented
development.**

# Installing
# Installing

The easiest way to install `ActiveModel::Serializers` is to add it to your
`Gemfile`:
Expand All @@ -28,7 +28,7 @@ Then, install it on the command line:
$ bundle install
```

#### Ruby 1.8 is no longer supported!
#### Ruby 1.8 is no longer supported!

If you must use a ruby 1.8 version (MRI 1.8.7, REE, Rubinius 1.8, or JRuby 1.8), you need to use version 0.8.x.
Versions after 0.9.0 do not support ruby 1.8. To specify version 0.8, include this in your Gemfile:
Expand Down Expand Up @@ -177,7 +177,7 @@ In an initializer:
ActiveSupport.on_load(:active_model_serializers) do
# Disable for all serializers (except ArraySerializer)
ActiveModel::Serializer.root = false

# Disable for ArraySerializer
ActiveModel::ArraySerializer.root = false
end
Expand Down Expand Up @@ -693,3 +693,24 @@ end
```

The caching interface uses `Rails.cache` under the hood.

# Design and Implementation

## Keep it Simple

ActiveModel::Serializers is capable of producing complex JSON views/large object
trees, and it may be tempting to design in this way so that your client can make
fewer requests to get data and so that related querying can be optimized.
However, keeping things simple in your serializers and controllers may
significantly reduce complexity and maintenance over the long-term development
of your application. Please consider reducing the complexity of the JSON views
you provide via the serializers as you build out your application, so that
controllers/services can be more easily reused without a lot of complexity
later.

## Performance

As you develop your controllers or other code that utilizes serializers, try to
avoid n+1 queries by ensuring that data loads in an optimal fashion, e.g. if you
are using ActiveRecord, you might want to use query includes or joins as needed
to make the data available that the serializer(s) need.