Class: Rails::Surrender::Render::Resource::Instance

Inherits:
Object
  • Object
show all
Defined in:
lib/rails/surrender/render/resource/instance.rb

Overview

Renders an instance resource

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(resource:, config:, ability:) ⇒ Instance

Returns a new instance of Instance.



11
12
13
14
15
 
# File 'lib/rails/surrender/render/resource/instance.rb', line 11

def initialize(resource:, config:, ability:)
  @resource = resource
  @config = config
  @ability = ability
end

Instance Attribute Details

#ability ⇒ Object (readonly)

Returns the value of attribute ability.



9
10
11
 
# File 'lib/rails/surrender/render/resource/instance.rb', line 9

def ability
  @ability
end

#config ⇒ Object (readonly)

Returns the value of attribute config.



9
10
11
 
# File 'lib/rails/surrender/render/resource/instance.rb', line 9

def config
  @config
end

#resource ⇒ Object (readonly)

Returns the value of attribute resource.



9
10
11
 
# File 'lib/rails/surrender/render/resource/instance.rb', line 9

def resource
  @resource
end

Instance Method Details

#render ⇒ Object 



17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
 
# File 'lib/rails/surrender/render/resource/instance.rb', line 17

def render
  config.history.push history_class

  result = {}
  config.locally_included_attributes.each { |attr| result[attr.to_sym] = resource.send(attr) }

  config.locally_included_expands.each_key do |key|
    next if config.exclude_locally?(key)

    nested_resource_class = nested_class_for(resource, key)
    next if config.history.include? nested_resource_class

    nested_config = nested_config_for(nested_resource_class, key)

    if resource.class.reflections[key.to_s].try(:collection?)
      collection = resource.send(key.to_sym).select { |i| ability.can? :read, i }
      result[key] = Collection.new(resource: collection, config: nested_config, ability: ability).render
    else
      instance = resource.send(key)
      next if config.history.include? instance.class

      if ability.can?(:read, instance)
        result[key] = Instance.new(resource: instance, config: nested_config, ability: ability).render
      elsif instance.nil?
        result[key] = nil # represent an associated element as null if it's missing
      end
    end
  end
  result
end