Aria Stewart (aredridel) wrote,
Aria Stewart

A new ruby database API?

Use the 'user' table from the default connection or pool

class User < DB('user')

Use a specific database connection or pool

Connection =

class Post < DB(Connection, 'post')

That is, identify the database by a (reconnectable) connection to it.


class Post < DB('posts'); end

class User < DB('users')
	collection :posts, Post, :author # Optionally specifying remote key

class Post < DB('posts')
	reference :author, User

Collection associations return a collection object, not an array — it's enumerable, but will perform the fetch either lazily or eagerly, and has methods to force those. It could also take advantage of cursors for huge datasets.

All in all, it's like a low-magic, easy-to-debug ActiveRecord that I have in mind. I'd layer it on top of DBI, and go about cleaning that up and speeding it up where possible. I'd also love to see the low-level database APIs speak something that's directly usable as a DBI driver, and do type conversions in the database-specific and fastest way possible, preferably in C.

Queries by single field name and primary key should be easy. Maybe something like User.find(:name, 'John') or User.fetch(1)

Queries by join to an associated table should be possible. I'd love suggestions for an API. Dropping to SQL should only be needed for really complex cases, and be well-defined how the objects are derived from the result set. Replacing what's under the hood with something entirely unlike SQL should be possible and only break apps using SQL queries.

All of this makes me wish Ruby had a way to swap in a custom parser inline and then yield back to normal parsing at some place. Something that would allow User.find(name = 'John' and joindate < — mixing in some Ruby syntax into a custom parser. I've some thoughts on how that could be done, but nothing coherent enough to stick in code.

Tags: databases, geek, ruby

  • Tumble

    Antigrain research on font rasterization. Seeing Yellow. Your color laser printer might be printing tracking information on each page.

  • Tumble

    The Beauty of LaTeX. LaTeX vs Word. This is why I feel like stabbing myself in the eyeballs after helping people use Word. ( Word processors are…

  • Mini Tumble

    Treetop, a packrat parsing library for Ruby. Rather impressive amount of code for a project with no releases and no webpage. OpenMoko runs on…

  • Post a new comment


    Anonymous comments are disabled in this journal

    default userpic

    Your reply will be screened

    Your IP address will be recorded