Ohm::IdentityMap
Provides a basic identity map for Ohm.
Usage
require "ohm/identity_map"
# By default, no identity map is used.
Post[1].object_id == Post[1].object_id
# => false
# Enable the identity map for the duration of a block.
Ohm::Model.identity_map do
Post[1].object_id == Post[1].object_id
end
# => true
Web
It's easy to create a Rack middleware to enable the identity map for the duration of the request/response cycle. (Such middleware may be included in this library in the future, once we test this behavior in production.)
class OhmIdentityMapMiddleware
def initialize(app)
@app = app
end
def call(env)
Ohm::Model.identity_map { @app.call(env) }
end
end
# config.ru or any Rack::Builder
use OhmIdentityMapMiddleware
Known issues
Currently not handling updates and deletes.
License
See UNLICENSE. With love, from Educabilia.