Thanks for your suggestion. I finally decided to find a way around the
problem. :) This is cutting too deep for me to handle with my current
clojure knowledge.
I also talked to Constantine Vetoshev (the author of appengine-magic)
and he anknowledged it as an issue which could have a solution by
Ok, so I'm stuck. If any of you more seasoned clojurians have a hint
that could get me out, I will be forever gratefull to him/her:
I'm trying execute a query against google app engine datastore, using
appengine-magic, with the filter dynamically generated from a map.
Here's the closest code I
Try (defmacro order-query [params]
`(ds/query :kind Order :filter (map #(list (key %) (val %)) ~params))) or
(defmacro order-query [params]
`(ds/query :kind Order :filter (map #(list (key %) (val %)) (eval
~params depending on the necessity of the eval (I suppose you don't
really need the
Ok, so I'm stuck. If any of you more seasoned clojurians have a hint
that could get me out, I will be forever gratefull to him/her:
I'm trying execute a query against google app engine datastore, using
appengine-magic, with the filter dynamically generated from a map.
Here's the closest
eval does work at macro expansion time, but only where it is actually
possible to evaluate the expression its given with only the
information available at macro expansion time at hand.
One case where there is not enough information -- and a minimal Can't
eval locals example -- is the following:
Ok, so I mailed off the above discussion without including any
suggestions for alternative approaches... *fail*
Anyway, I think Joop's answer (especially the first code snippet) is
*very* likely to be the best. As far as I can tell from reading the
source, appengine-magic's query macro includes
