dry-schema partial

problem.rb

AddressSchema = Dry::Schema.Params do
  required(:street).filled(:string)
  required(:city).filled(:string)
  required(:zipcode).filled(:string)
  required(:email).filled(:string)
end

# ...

# CREATE { street: 'Baker Street', city: 'London', zipcode: 'NW1/W1', email: 'sherlock@holmes.co.uk' }
post '/addresses' do
  schema = AddressSchema.(params)
  DB[:addresses].insert(schema.to_h) if schema.success?
end

# UPDATE { email: 'hudson@bakerstrapartments.co.uk' }
patch '/address/:id' do
  schema = AddressSchema.(params) # this will obviously fail
  DB[:addresses].where(id: params['id']).update(schema.to_h)
end