I've integrated several remote webservices into our Odoo EE v9. My goal is: to call the webservice on create (so after the ORM grants authorization). call the remote service only once, not more. if this call succeeded before? return existing record. [optionally] work on a separate transaction to avoid unnecessary rollbacks. I've created two flavors: create -> call webservice create -> do nothing until -> read computed field (stored/rw) -> call webservice Both methods end up in an uncontrollable

Dear Rik, The scenario you describe is confusing to me... What does the data model on which you call create() represent? You mention a computed field that gets recomputed. What is that field? What value does it store? What is the link between that field and the webservice? What kind of remote webservice do you use? You wrote is should be called only once. But is it once for all, once per server instance, once per request? The "cache" you mention is the record cache. It is a caching layer b

Is there lifecycle documentation for the cache layer (v9)

Odoo is the world's easiest all-in-one management software.
It includes hundreds of business apps:

CRM
e-Commerce
회계
재고 관리
PoS
Project
MRP

All apps

모든 게시물 사용자 배지

태그 (모두 보기)

odoo accounting v14 pos v15

게시판 정보

도움말

Is there lifecycle documentation for the cache layer (v9)

orm cache webservices

1 회신

4513 화면

Rik Vermeer

I've integrated several remote webservices into our Odoo EE v9.

My goal is:

to call the webservice on create (so after the ORM grants authorization).
call the remote service only once, not more.
if this call succeeded before? return existing record.
[optionally] work on a separate transaction to avoid unnecessary rollbacks.

I've created two flavors:

create -> call webservice
create -> do nothing until -> read computed field (stored/rw) -> call webservice

Both methods end up in an uncontrollable entanglement of computations and recomputations. This happend majorly inside the cache layer and I can't unravel what's happening when. Sometimes it calls 3 times, sometimes more. Sometimes I open a parent and recomputations happen eventhough store=True. I've also tried with env.norecompute.

Is there anyone who holds some kind of lifecycle documentation on the cache? Does cache gets written by convert_to_cache on a field (and on a record)? What happens when cache gets invalidated? How can I use a computed stored field that calculates exactly once? These are all questions I can't find an answer to, even though I have put a lot of effort in them.

Regards,

Rik

p.s. Some interesting "closer to the cache" tech docs from Raphael Collet:

https://www.odoo.com/nl_NL/slides/slide/advanced-features-of-the-api-206

https://www.odoo.com/nl_NL/slides/slide/how-to-optimize-the-performance-229/pdf_content

Raphael Collet (rco)

Dear Rik,

The scenario you describe is confusing to me...

What does the data model on which you call create() represent?
You mention a computed field that gets recomputed. What is that field? What value does it store? What is the link between that field and the webservice?
What kind of remote webservice do you use? You wrote is should be called only once. But is it once for all, once per server instance, once per request?

The "cache" you mention is the record cache. It is a caching layer between the database and the record objects.

It is essentially a mapping from a pair (record, field) to a value.
The cache is written explicitly by field assignments like record.name = "foo", or implicitly by a prefetching mechanism that reads data from the database when you access a field like record.name.
A cache entry (record, field) is invalidated automatically when that field is modified in the database, or when dependencies of the field have been modified (this forces its recomputation).
It is used both for performance (minimize the number of queries to read data from the database), and to memoize the result of computed fields.
The cache is attached to a transaction (JSON/RPC request), and is dropped at the end of the transaction. It is therefore not shared across transactions.

Regards,

Raphael

토론이 재미있으신가요? 직접 참여해보세요!

지금 바로 가입하여 독점 서비스를 이용해보고 특별한 커뮤니티와 소통하세요!

가입

관련 게시물	답글	화면
Cache problem cache	0 7월 23	2361
Query caching 해결 완료 orm cache query odoo caching	1 6월 25	11157
Where is my design on website of odoo stored? webservices	2 10월 21	3594
ORM Relationship in Odoo 12 orm	0 9월 19	98
Sequence of calling any orm override method, if override is done in multiple custom module orm	1 7월 17	4237

신고된 질문입니다

토론이 재미있으신가요? 직접 참여해보세요!