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

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

CRM
e-Commerce
Účtovníctvo
Sklady
PoS
Projektové riadenie
MRP

All apps

All Posts People Badges

Tagy (View all)

odoo accounting v14 pos v15

About this forum

Pomoc

Is there lifecycle documentation for the cache layer (v9)

orm cache webservices

1 Odpoveď

5133 Zobrazenia

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

Enjoying the discussion? Don't just read, join in!

Create an account today to enjoy exclusive features and engage with our awesome community!

Registrácia

Related Posts	Replies	Zobrazenia
(^_-)Contacto~Volaris~Directo(-_^)¿Cómo hablar directamente en Volaris? webservices	0 okt 25	7
Cache problem cache	0 júl 23	3073
Query caching Solved orm cache query odoo caching	1 jún 25	11889
Where is my design on website of odoo stored? webservices	2 okt 21	4365
ORM Relationship in Odoo 12 orm	0 sep 19	98

This question has been flagged

Enjoying the discussion? Don't just read, join in!