* im_livechat, test_event_full, website_blog, website_crm,
website_event, website_event_track, website_event_track_quiz,
webite_livechat, website_sale
There is 6 main changes in this commit:
1. Using raw SQL Upsert instead of the ORM methods. While raw SQL should
generally be avoided, it makes sense for such a low level behavior which
is impacting every flows.
Indeed, tracking visitors is a generic behavior done on all pages and
controllers. It is important to optimize it to reduce processing time
and SQL Queries.
Benchmark of that change alone:
> Rendering a tracked page improves from ~19.5ms to ~17ms (using `ab`
with 1000 loop) and the requests involved in the tracking process are
reduced from 8 SQL Queries to 3:
- 1 request to upsert the visitor
- 1 request to fetch the visitor data
- 1 request to add the tracking record
2. Adding in that upsert query the `visitor.track` insert, creating both
records in one go, bringing the query count from 3 to 2.
3. Refactoring of the `parent_id` behavior that was introduced in stable
with [1]. The purpose was to keep track of multiple visitor linked to a
same user to merge the tracking together. Especially useful for tracking
a same visitor on different devices (when logged in).
Only one visitor was kept as active, others would be archived and their
tracks would be set/moved to the main partner.
Removing those duplicate visitor was not possible because those archived
duplicated visitor were holding the devices notification push token.
Since [2], those token were moved to their own table, all related to the
main visitor.
We can then now safely remove those duplicate visitors after merging
their track to the main visitor. Thus, the `parent_id` field is no more
useful. Removing it removes a layer of complexity.
Note that thanks to this part, the `active` field can also be removed.
4. Deeper functionnal change, inspired from Plausible: The access_token
is no more stored in a cookie but is the result of a hashing method
based on <IP Adress, User Agent>.
The reason behind that change is that, in an upcoming refactoring,
sessions won't be stored anymore unless absolutely needed (login, add to
cart..). It will also ship a no cookies policy, trying to get rid of all
cookies.
This change is bringing some functional changes:
- Since the IP is included in the hash to generate the token, it means
that:
A. If an anonymous user switch IP (eg from 4G to wifi), it is
considered as a new visitor.
B. If 2 anonymous users with the exact same user agent (same browser,
same browser version, same exact os or phone) are on the same IP,
those will be considered as the same visitor.
- Since the request host is not included in the hash, it means that
visiting a DB from 2 differents URLs (domain and/or ip) on the same
device and same browser will result in a shared visitor.
It shouldn't imply any issue as this is A. not wrong and B. mostly
used for tests.
As all this is only related to non logged in user, it shouldn't be a
real issue as anonymous visitors are not supposed to be meant to be
business critical, even if we use them for "a bit more" than simple
analytics data.
5. The access_token is now replaced by the partner_id once the user logs
in, so:
- We don't need to either search on the partner_id field or the
access_token field (depending if the user is logged in or not), we can
only use the access_token row/field to do both.
- On logout, everything works out of the box as the access_token will be
regenerated since there is no partner_id anymore.
- On login, if an access_token matches the user's partner_id, that
visitor is returned.
If there is no such token, a new visitor is created for that partner_id.
In both 2 cases, tracks are moved to that visitor and the anonymous
visitor is removed.
- We can remove the code that was in charge of checking if the
access_token / visitor cookie was wrong (coming from another user eg,
different user login on same device). Indeed, such collision is not
possible anymore as the access_token automatically match the logged in
user.
- We can remove the code that was in charge of checking if the
access_token / visitor cookie was wrong (coming from a logged in user
while the current visitor is not loggedin). Such collision is not
possible anymore as the access_token is (re)generated as an anonymous
token (hash) when not logged in.
6. There is no more check to prevent a track to be created if there was
already a track for that URL in the last 30 minutes.
While this can easily be re-introduced (one CTE on the upsert), it was
adding ~100ms (from ~20 to ~110ms) to the request on a big database as
Odoo where there is ~100 millions tracks and ~100 millions visitors.
It has been validated that it was not a real issue as it is not
fundamentally wrong. If a visitor visited 20 times a product or a
specific page in that short amount of time, you might want to know that
because the user is most likely interested by it.
Changes (1+2), 3, (4+5) and 6 are all independant from each other and
could have existed on their own.
[1]: https://github.com/odoo/odoo/commit/c6b8a44b970a46dcd87a4e2cb1ad52fa340b209f
[2]: https://github.com/odoo/enterprise/pull/16781/commits/f75090fe8b42484e89e933976e8441d2f5eb9415
task-2867045
closesodoo/odoo#87857
Related: odoo/enterprise#28004
Related: odoo/upgrade#3566
Signed-off-by: Romain Derie (rde) <rde@odoo.com>
Romain Derie
d348bed1ad