activerecord pattern example 1

example update

def update
  @model = Model.find(params[:id]) # ActiveRecord's find method being used here
  @model.update_attributes(params) # ActiveRecord's update_attributes method being used here
  if @model.save # ActiveRecord's save method being used here
    respond_with(@model)
  else
    respond_with(@model.errors)
  end
end

repo usage

repo = UserRepository.new # NOT in the inheritance chain for user
user = repo.find(id: 1) # the returned object has no idea how to find itself or others
admins = repo.find(role: 'admin')
repo.update(user, role: 'admin')

rspec stubbing

before(:each) do
  expect(Model).to receive(:find).and_return(build(:model))
  expect(Model).to receive(:update_attributes).and_return(build(:model))
  expect(Model).to receive(:save).and_return(true)
end