It seems to me that it's a problem that sooner or later appears in any
project using relational database (apart form easy cases, when there is no
many relations between tables). Am I missing something? How do you guys
work with database results of queries containing several tables referring
to each other?
W dniu czwartek, 21 maja 2015 21:57:03 UTC+2 użytkownik Krzysiek Herod
napisał:
>
> I've found the question appearing here, but a long time ago, so I thought
> that maybe the situation changed:
>
> Is there a relational mapper in clojure (or in java) that takes query
> result and generates an array of hashmaps?
> I mean something that converts the result of this query:
> "SELECT * FROM posts LEFT JOIN comments ON (comments.post_id = posts.id)
> LEFT JOIN users ON (posts.user_id = users.id)"
> into (for example) the following structure:
> [{:title "Post title" :user {:first_name "User 1"} :comments [{:title
> "Comment 1"} {:title "Comment 2"}]}]
>
> I've used kormadb for that, but it works like this only with has-many
> relation (belongs-to puts all of the fields from related tables into the
> same hash as if it was one table, and using "with" do not solve the problem
> neither).
>
> Is there any other clojure library that does that, or is any java library
> used instead?
>
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