JsonDefaults

Very simple library for defining default options for your object.

Installation

Add this line to your application's Gemfile:

gem 'json_defaults'

And then execute:

$ bundle

Or install it yourself as:

$ gem install json_defaults

Usage

Working with Model

• Create jsonb field for you model:

rails g migration add_json_field_to_users json_field:jsonb
rake db:migrate

• Add this to your model:

class User < ActiveRecord::Base
  extend JsonDefaults

  json_defaults(
    field: "json_field", 
    options: {
      field1: "It's",
      field2: "awesome"
    }
  )
end

And next just use defined fields with default options

user = User.new
user.json_field # => {"field1"=>"It's", "field2"=>"awesome"}
user.field1 # => It's
user.field2 # => awesome

You can update this field directly

user = User.new
user.field1 # => It's
user.field1 = "cool" 
user.field1 # => cool

• You can also define type for each field:

class User < ActiveRecord::Base
  extend JsonDefaults

  json_defaults(
    field: "json_field", 
    options: {
      field1: "It's",
      field2: "awesome",
      field3: {
        value: false,
        boolean: true
      },
      field4: {
        value: 666,
        integer: true
      }
    }
  )
end

user = User.new
user.field4 # => 666
user.field4 = "123" 
user.field4 # => 123

Options for defining field

  json_defaults(
    field: "json_field", 
    active_record: true,
    options: {
      key: "value",
      key: {
        value: 666,
        integer: true
      }
    }
  )

Option	type	Description
field	String	This parameter specifies which field in the model the json_defaults plugin will be applied to.
options	Hash	Default hash for selected field with key and value
key		Key's name in default hash. Can be string or symbol