Module: Avo::Concerns::ChecksAssocAuthorization

Extended by:
ActiveSupport::Concern
Included in:
ResourceComponent
Defined in:
lib/avo/concerns/checks_assoc_authorization.rb

Instance Method Summary collapse

Instance Method Details

#authorize_association_for(policy_method) ⇒ Object

Ex: A Post has many Comments



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# File 'lib/avo/concerns/checks_assoc_authorization.rb', line 7

def authorize_association_for(policy_method)
  policy_result = true

  if @reflection.present?
    # Fetch the appropriate resource
    reflection_resource = field.resource
    # Fetch the record
    # Hydrate the resource with the record if we have one
    reflection_resource.hydrate(record: @parent_record) if @parent_record.present?
    # Use the related_name as the base of the association
    association_name = @reflection.name

    if association_name.present?
      method_name = :"#{policy_method}_#{association_name}?".to_sym

      # Use the policy methods from the parent (Post)
      service = reflection_resource.authorization

      if service.has_method?(method_name, raise_exception: false)
        # Some policy methods should get the parent record in order to have the necessary information to do the authorization
        # Example: Post->has_many->Comments
        #
        # When you want to authorize the creation/attaching of a Comment, you don't have the Comment instance.
        # But you do have the Post instance and you can get that in your policy to authorize against.
        parent_policy_methods = [:view, :create, :attach, :act_on]

        record = if parent_policy_methods.include?(policy_method)
          # Use the parent record (Post)
          reflection_resource.record
        else
          # Override the record with the child record (Comment)
          resource.record
        end
        policy_result = service.authorize_action(method_name, record: record, raise_exception: false)
      end
    end
  end

  policy_result
end