What?
org.clojure/java.jdbc “0.5.5”
Clojure contrib wrapper for JDBC database operations
Where?
https://github.com/clojure/java.jdbc#change-log
Why?
In the previous versions (0.5.0 and earlier), options to most functions
were specified as inline unrolled keyword/value arguments:
(jdbc/query db [“select * from foo where id = ?” pk]
:row-fn :name :result-set-fn first :identifiers identity)
Whilst this style of argument is convenient from the REPL, it becomes
increasingly awkward as you start composing functions – you start having to use
`apply` and `mapcat identity` and so on.
Version 0.5.5 introduces a single options map argument into all
functions that previously took unrolled keyword/value arguments. It is the
optional, last argument in all cases (see caveat below).
(jdbc/query db [“select * from foo where id = ?” pk]
{:row-fn :name :result-set-fn first :identifiers identity})
Version 0.5.5 continues to support the unrolled option arguments but
considers them deprecated – and using them will cause a DEPRECATED message to
be printed to stdout (this was already true for `db-transaction` which was
deprecated in favor of `with-db-transaction` back in version 0.3.0).
Plans?
Version 0.5.6 will further clean up the calling syntax for several
functions. Expect a few API additions and a few more deprecations.
Version 0.6.0 will remove all deprecated functionality (including the
old API which continued in java.jdbc.deprecated for several versions).
Caveat?
Two functions were problematic since they were already variadic in
their regular arguments: `insert!` and `create-table-ddl`. In order to flag the
(optional) options map, these now expect an `:options` argument followed by the
actual options map. I am considering introducing new functions with better
argument lists in 0.5.6 to clean this up.
Sean Corfield -- (904) 302-SEAN
An Architect's View -- http://corfield.org/
"Perfection is the enemy of the good."
-- Gustave Flaubert, French realist novelist (1821-1880)
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