hrm, update-in isn't meant to be used that way.
Here's an example from clojuredocs:
user=> (def p {:name "James" :age 26})
#'user/p
user=> (update-in p [:age] inc)
{:name "James", :age 27}
;; remember, the value of p hasn't changed!
user=> (update-in p [:age] + 10)
{:name "James", :age 36}
The second arg is like a 'path' to the value to update.
In your code, here: (commute items #(remove (fn [x](= (:id x) id)) %))
Seems like % might have started out as a vector, but it gets returned as a
seq. That's the first thing to fix, seqs don't have keys.
Vectors have integer keys, but my intuition says you probably want to be
storing a map of ids to records, in which case, something like:
(commute items #(update-in % [:id] (fn [my-record]
(do-something-that-returns-a-new-record my-record))))
and your use of 'remove' could simply be a dissoc by id.
On Tue, Apr 8, 2014 at 6:14 PM, Ivan Schuetz <[email protected]> wrote:
> Ahh dataprovider/products should be "items". Forgot to "simplify".
>
>
> Am Mittwoch, 9. April 2014 00:12:48 UTC+2 schrieb Ivan Schuetz:
>
>> Hi,
>>
>> sorry I don't get it. I just started learning Clojure.
>>
>> I did this to remove element with id 1
>>
>> (commute items #(remove (fn [x](= (:id x) id)) %))
>>
>> From your statement I understand update-in would work for the update, but
>> I don't know the syntax. Something like
>>
>> (commute dataprovider/products #(update-in % {:id id} (->Item ???) ))
>>
>>
>>
>>
>> Am Mittwoch, 9. April 2014 00:01:00 UTC+2 schrieb Gary Trakhman:
>>>
>>>
>>>> But 1. Can't find examples with records, 2. Not sure if I can use it to
>>>> update a different field than the one I'm using to do the query. In the
>>>> examples fields seem to be the same.
>>>>
>>>>
>>>>
>>> Leave off the last path segment and return the full updated record, not
>>> just the new field's value.
>>>
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