Bhavesh
Hi ![]()
I am trying to get the data paginated, and I am trying all the methods and actions but still stuck while doing that. here is the methods I tried
read :list do
pagination do
keyset? true
offset? true
countable true
default_limit 10
end
end
read :list do
pagination do
offset? true
countable true
default_limit 10
end
filter expr(true)
end
I found all the result variables like count,more, before, after but while reading the documentation i found that the methods gives counts expect i got “nil” and for list i am doing this,
- List item
allcontect =
People
|> Ash.Query.for_read(:list)
|> Ash.read!()
- List item with count and pagination
page = 1
limit = 10
offset = (page - 1) * limit
allcontect =
People
|> Ash.Query.for_read(:list)
|> Ash.Query.limit(limit)
|> Ash.Query.offset(offset)
|> Ash.read!()
It give me only first 10 records but I am not able to fetch others while handling next_page and previous_page events.
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zachdaniel
Take a look at the pagination guide: Pagination — ash v3.29.3
Pagination is done via
Ash.Query.pageor via thepageoption toAsh.read, i.eor
Bhavesh
Thanks, it’s very help-full for me i used this,
this is working actually and i tested for thousands of data but i am wondering it can help me to handle millions of data or not?
olivermt
As long as your offset or keyset page id is indexed that is fine (and PKs generally are).
Bhavesh
Thanks! That makes sense.
zachdaniel
Look into keyset pagination. It will perform well on practically any amount of data with properly indexed data
dimitarvp
Link (v3.5.6 as of 2025-APR-18): Ash Keyset Pagination
btw, is this relating to cursor pagination?
I can’t find it mentioned anywhere.
Or, since we are here on this topic, is keyset pagination the same as e.g. “give me 20 records where ID is greater than 157”?
zachdaniel
Yes. I should add “also known as cursor pagination” somewhere on that page to make it easier to find.
edit: done