[Haskell-cafe] Subject: A universal data store interface

Greg Weber greg at gregweber.info
Tue Feb 14 20:37:52 CET 2012

Hi Deian,

Thanks for bringing this to our attention - this is a neat project! It
actually looks *exactly* like persistent - I can't actually discern a
meaningful difference, although likely your internals are slightly
simpler if you only support MongoDB. If your goals are to support
multiple backends then it seems your goals are *exactly* the same as
Persistent. Lets collaborate on this off of the mail list.

The url listed on hackage for the git repo points to Stanford, not github.

Greg Weber

On Tue, Feb 14, 2012 at 11:17 AM, Deian Stefan <haskell-cafe at deian.net> wrote:
> On Mon, Feb 13, 2012 at 11:52, Greg Weber <greg at gregweber.info> wrote:
>> That being said, I would like to have a Template Haskell interface
>> instead of just a QQ interface. The reason why we haven't bothered
>> with doing that ourselves is because the record name-spacing issue
>> makes the current QQ interface much more convenient. I am actively
>> working to solve the namespace issue. This all brings up a great point
>> though: as part of the GSoC we should create a Template Haskell
>> interface (similar to acid-state as you mention). Given the structure
>> of things that Michael has already pointed out, and that we are
>> already using Template Haskell with the DSL, this should only be a few
>> day's work.
> I'm joining this thread slightly late, but thought I point to a
> similar TH approach:
> http://hackage.haskell.org/package/structured-mongoDB
> The implementation is very much MongoDB-specific, but we're working on
> targeting different backends (package is on github, so we welcome other
> hackers).  Of course, some of the issues that have been
> brought up (e.g., no support for projection) still exist in
> structured-mongoDB, but our goals have been more relaxed:
> 1) provide a type-safe interface to MongoDB, 2) to avoid QQ DSL
> approach if possible, and 3) support a HaskellDB-like query interface.

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