Best method not found when passing credentials to a function

[ahjones]

Using Amazonica 0.1.21.

I'm not sure if this is an issue, or I'm just using the library awkwardly.

If I put my Amazon credentials into environment variable the following works fine:

(use 'amazonica.aws.s3)
(get-object-metadata {:bucket-name "ahjones-test" :key "foo"})

However, if I want to pass in credentials as the first parameter I get a message that says that the best method can't be found.

(def cred {:access-key "key" :access-secret "secret"})
(get-object-metadata cred {:bucket-name "ahjones-test" :key "foo"})

The exception:

IllegalArgumentException Could not determine best method to invoke for get-object-metadata using arguments ({:secret-key "secret", :access-key "key"} {:key "foo", :bucket-name "ahjones-test"})
    amazonica.core/intern-function/fn--1458 (core.clj:705)
    user/eval1649 (form-init5154478138353900686.clj:1)
    clojure.lang.Compiler.eval (Compiler.java:6619)
    clojure.lang.Compiler.eval (Compiler.java:6582)
    clojure.core/eval (core.clj:2852)
    clojure.main/repl/read-eval-print--6588/fn--6591 (main.clj:259)
    clojure.main/repl/read-eval-print--6588 (main.clj:259)
    clojure.main/repl/fn--6597 (main.clj:277)
    clojure.main/repl (main.clj:277)
    clojure.tools.nrepl.middleware.interruptible-eval/evaluate/fn--591 (interruptible_eval.clj:56)
    clojure.core/apply (core.clj:617)
    clojure.core/with-bindings* (core.clj:1788)

However this is OK

(get-object-metadata cred :bucket-name "ahjones-test" :key "foo")

[mcohen01]

you should be able to pass key-value pairs or an explicit map, both with and without and explicit credentials map. the exception to this are some functions in the s3 ns whose java equivalents are "non-standard," in that their arguments are not a simple AWS *Request bean. A few of those don't resolve properly.