Module: SkinnyControllers::Operation::ModelHelpers

Included in:
Base
Defined in:
lib/skinny_controllers/operation/model_helpers.rb

Instance Method Summary collapse

Instance Method Details

#model ⇒ Object 



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# File 'lib/skinny_controllers/operation/model_helpers.rb', line 4

def model
  # TODO: not sure if multiple ids is a good idea here
  # if we don't have a(ny) id(s), get all of them
  @model ||=
    if params[:scope]
      model_from_scope
    elsif (key = params.keys.grep(/\_id$/)).present?
      # hopefully there is only ever one of these passed
      id = params[key.first]
      model_from_named_id(key.first, id)
    elsif id_from_params
      model_from_id
    else
      model_from_params
    end
end

#model_from_id ⇒ Object 



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# File 'lib/skinny_controllers/operation/model_helpers.rb', line 69

def model_from_id
  model_class.find(id_from_params)
end

#model_from_named_id(key, id) ⇒ Object 



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# File 'lib/skinny_controllers/operation/model_helpers.rb', line 51

def model_from_named_id(key, id)
  name, _id = key.split('_')
  name = name.camelize
  model_from_scope(
    id: id,
    type: name
  )
end

#model_from_params ⇒ Object 



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# File 'lib/skinny_controllers/operation/model_helpers.rb', line 38

def model_from_params
  ar_proxy = model_class.where(sanitized_params)

  if ar_proxy.respond_to? SkinnyControllers.accessible_to_scope
    # It's better to filter in sql, than in the app, so if there is
    # a way to do the filtering in active query, do that. This will help
    # mitigate n+1 query scenarios
    return ar_proxy.accessible_to(current_user)
  end

  ar_proxy
end

#model_from_scope(scope = params[:scope]) ⇒ Object 



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# File 'lib/skinny_controllers/operation/model_helpers.rb', line 60

def model_from_scope(scope = params[:scope])
  if scoped = scoped_model(scope)
    association = association_name_from_object
    scoped.send(association)
  else
    fail "Parent object of type #{scope[:type]} not accessible"
  end
end

#sanitized_params ⇒ Object 



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# File 'lib/skinny_controllers/operation/model_helpers.rb', line 21

def sanitized_params
  keys = (model_class.column_names & params.keys)
  params.slice(*keys).symbolize_keys
end

#scoped_model(scoped_params) ⇒ Object 



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# File 'lib/skinny_controllers/operation/model_helpers.rb', line 26

def scoped_model(scoped_params)
  unless @scoped_model
    klass_name = scoped_params[:type]
    operation_class = Lookup::Operation.operation_of(klass_name, DefaultVerbs::Read)
    operation = operation_class.new(current_user, id: scoped_params[:id])
    @scoped_model = operation.run
    self.authorized_via_parent = !!@scoped_model
  end

  @scoped_model
end