Class: Handlers::Polymorph

Inherits:
Base
  • Object
show all
Defined in:
lib/handlers/polymorphs.rb

Instance Method Summary collapse

Methods inherited from Base

handle, #raise_error, #upper

Constructor Details

#initialize(klass, polymorph) ⇒ Polymorph

Handle either the retrieving of the associated relation or the creation of the resource based on this possible input and the params

Params:

klass

ActiveFormObject::Base instance

polymorph

The param specified in the dsl, example :

{
    key: :content,
    foreign_key: :program_id,
    types: {
      polymorph: Dsl::PolymorphsTest::PolymorphForeignForm
    }
  }



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# File 'lib/handlers/polymorphs.rb', line 29

def initialize(klass, polymorph)
  @polymorph = polymorph

  super(klass)
end

Instance Method Details

#form_class ⇒ Object 



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# File 'lib/handlers/polymorphs.rb', line 48

def form_class
  @type = @resource.try(@polymorph[:key]).try(:type) || @params_to_send['type']
  raise_error("No 'type' method or 'type‘ key found in params for '#{@polymorph[:key]}' polymorphic relation") if @type.nil?

  @params_to_send.delete(:type)
  @polymorph[:types][@type.try(:to_sym)]
end

#handle ⇒ Object 



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# File 'lib/handlers/polymorphs.rb', line 35

def handle
  @params_to_send = @params[@polymorph[:key]] || {}
  form = form_class

  raise_error("The form resolved with key '#{@type}' seems to be nil. Check your polymorphic relation key and the associated forms.") if form.nil?

  polymorph_instance = form.new(@params_to_send, @resource.try(@polymorph[:key])).save!

  @params["#{@polymorph[:key]}_id"] = polymorph_instance.id
  @params["#{@polymorph[:key]}_type"] = polymorph_instance.class.name
  @params.delete(@polymorph[:key])
end