Datomic Knowledgebase - Questions without answers in Peer API

query with pull and more attributes count max min etc

Tue, 31 Aug 2021 20:42:03 +0000

When I try pull attributes together with max, min or count I received only 2 attributes.

I want the same output from Example 1, but instead a new query to :where, I want use (pull).

My problem its on example 2, I'm missing or a did something wrong?

Exemple 1, happens correctly:

(defn resume [db]

  (d/q '[:find ?name-cat (min ?price) (max ?price) (count ?price)
         :keys category min max qtd
         :with ?product
         :where [?product :product/price ?price]
         [?product :product/category ?category]
         [?category :category/nome ?name-cat]]

       db))

[{:category "Eletronics",

  :min 15M,

  :max 15M,

  :qtd 10}]

Exemplo2, using (pull)

(defn resume [db]

  (d/q '[:find (pull ?category [:category/nome])
         (min ?price)
         (max ?price)
         (count ?price)
         ;:keys category min max qtd ;cant use kays because Indexoutbound happen

        :with ?product ;using with because it is a conj, so now it allow if a product has same price
         :where [?product :product/price ?price]
         [?product :product/category ?category]]

       db))

output

[{:category/id 34 :category/name "test"} 10

It would be nice to have something like sync-excise to coordinate with background history removal

Mon, 26 Jul 2021 15:58:21 +0000

According to the docs: "The effect of :db/noHistory happens in the background, and some amount of history may be visible even for attributes with :db/noHistory set to true." It would be useful to have something like sync-excise to know when the db value is aware of all history removal of a specific (noHistory) attribute.

Reverse order browsing for raw indexes

Mon, 25 Jan 2021 11:39:25 +0000

Hello,
The index-pull function has the :reverse option to go through the index in reverse order.
Would it be possible to add it to the raw index browsing functions index-range and seek-datoms ?

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Sun, 25 Oct 2020 19:36:18 +0000

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Backup and Restore available via Peer API

Thu, 22 Oct 2020 18:14:38 +0000

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