It works for me, for '(intent {} "yes" :yes "WAT")'
I get the error: IllegalArgumentException No method in multimethod 'intent'
for dispatch value: WAT clojure.lang.MultiFn.getFn (MultiFn.java:156)
You're probably being bitten by a different issue. It's impossible to
redefine the dispatch function within the definition of the multimethod
after the first call to 'defmulti'. In order to do so, you would have to
first ns-unmap that var.
An alternative for development is to use the dispatch function's Var as the
dispatch function:
(defn intent-dispatch [& args]
(apply discern args))
(defmulti intent #'intent-dispatch)
On Wed, Sep 30, 2015 at 8:33 PM Lawrence Krubner <lawre...@rollioforce.com>
wrote:
> For maximum flexibility I wanted to use a multimethod, defined like this:
>
>
> (defmulti intent
> (fn [& args]
> (apply discern args)))
>
> This is how discern is defined:
>
> (defn- discern
>
> ([this-users-conversation]
> {:pre [(map? this-users-conversation)]}
> (:intent this-users-conversation))
>
> ([this-users-conversation salesforce-object-name]
> {:pre [(map? this-users-conversation)
> (string? salesforce-object-name)]}
> (:intent this-users-conversation))
>
> ([this-users-conversation salesforce-object-name name-of-attribute]
> {:pre [(map? this-users-conversation)
> (string? salesforce-object-name)
> (string? name-of-attribute)]}
> (:intent this-users-conversation))
>
> ([this-users-conversation salesforce-object-name name-of-attribute
> name-of-intent]
> {:pre [(map? this-users-conversation)
> (string? salesforce-object-name)
> (keyword? name-of-attribute)
> (string? name-of-intent)]}
> name-of-intent))
>
> but then I call the multimethod like this:
>
> (intent this-users-conversation "Opportunity" :Name
> "query-salesforce-for-attribute")
>
> and I get:
>
> :class clojure.lang.ArityException,
> :message "Wrong number of args (4) passed to: query/fn--65",
>
> Should I give up on this idea, or is there a way to make this work?
>
>
>
>
>
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