Class: JsonApiReflection

Inherits:
Object
  • Object
show all
Defined in:
lib/active_model_serializers/adapter/json_api_pg.rb

Overview

Wraps what we know about a reflection. Includes the ActiveRecord::Reflection, the ActiveModel::Serializer::Reflection, and the JsonApiReflectionReceiver results (i.e. the contents of a has_many block from the serializer definition).

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, ar_class, serializer_class) ⇒ JsonApiReflection

ar_class should be the source ActiveRecord class, so that ar_class.name is one or more things of klass.



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# File 'lib/active_model_serializers/adapter/json_api_pg.rb', line 265

def initialize(name, ar_class, serializer_class)
  @name = name
  @ar_class = ar_class
  @original_name = @ar_class.instance_method(name).original_name

  @serializer_reflection = serializer_class._reflections[name.to_sym]

  @ar_reflection = ar_class.reflections[name.to_s]
  @reflection_sql = nil
  if @ar_reflection.nil?
    # See if it's an alias:
    @ar_reflection = ar_class.reflections[@original_name.to_s]
  end
  if @ar_reflection.nil?
    m = "#{name}__sql".to_sym
    if ar_class.respond_to? m
      rel = ar_class.send(m)
      # Must be an ActiveRecord::Relation (or ActiveModel::Base) so we can determine klass
      @reflection_sql = rel
      @klass = ActiveRecord::Relation === rel ? rel.klass : rel
    else
      raise "Can't find an association named #{name} for class #{ar_class.name}"
    end
  else
    @klass = @ar_reflection.klass
  end
  @include_data = true
  @links = {}

  if serializer_reflection.try(:block).present?
    x = JsonApiReflectionReceiver.new(serializer_class)
    x.instance_eval &serializer_reflection.block
    @include_data = x.result_include_data
    @links = x.result_links
  end
end

Instance Attribute Details

#ar_class ⇒ Object (readonly)

Returns the value of attribute ar_class.



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# File 'lib/active_model_serializers/adapter/json_api_pg.rb', line 259

def ar_class
  @ar_class
end

#ar_reflection ⇒ Object (readonly)

Returns the value of attribute ar_reflection.



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# File 'lib/active_model_serializers/adapter/json_api_pg.rb', line 259

def ar_reflection
  @ar_reflection
end

#include_data ⇒ Object (readonly)

Returns the value of attribute include_data.



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# File 'lib/active_model_serializers/adapter/json_api_pg.rb', line 259

def include_data
  @include_data
end

#klass ⇒ Object (readonly)

Returns the value of attribute klass.



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# File 'lib/active_model_serializers/adapter/json_api_pg.rb', line 259

def klass
  @klass
end

#links ⇒ Object (readonly)

Returns the value of attribute links.



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# File 'lib/active_model_serializers/adapter/json_api_pg.rb', line 259

def links
  @links
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/active_model_serializers/adapter/json_api_pg.rb', line 259

def name
  @name
end

#original_name ⇒ Object (readonly)

Returns the value of attribute original_name.



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# File 'lib/active_model_serializers/adapter/json_api_pg.rb', line 259

def original_name
  @original_name
end

#reflection_sql ⇒ Object (readonly)

Returns the value of attribute reflection_sql.



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# File 'lib/active_model_serializers/adapter/json_api_pg.rb', line 259

def reflection_sql
  @reflection_sql
end

#serializer_reflection ⇒ Object (readonly)

Returns the value of attribute serializer_reflection.



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# File 'lib/active_model_serializers/adapter/json_api_pg.rb', line 259

def serializer_reflection
  @serializer_reflection
end

Instance Method Details

#belongs_to? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_model_serializers/adapter/json_api_pg.rb', line 302

def belongs_to?
  ar_reflection.is_a? ActiveRecord::Reflection::BelongsToReflection
  # TODO: fall back to AMS reflection
end

#has_many? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_model_serializers/adapter/json_api_pg.rb', line 307

def has_many?
  ar_reflection.try(:is_a?, ActiveRecord::Reflection::HasManyReflection) ||
    serializer_reflection.is_a?(ActiveModel::Serializer::HasManyReflection)
end

#has_one? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_model_serializers/adapter/json_api_pg.rb', line 312

def has_one?
  ar_reflection.is_a? ActiveRecord::Reflection::HasOneReflection
  # TODO: fall back to AMS reflection
end