Prefetching is underused when all fields are traversed one record at a time.
So instead, traverse all records one field at a time. This guarantees batch
prefetching/computation on every field being accessed.
That function is called when computing related fields in onchange mode.
The new implementation makes a direct access to the cache's implementation.
opw-772303
When deciding to prefetch records (getting records from the cache with
no value for the field being fetched), if the field was computed
`determine_value` would just get all records, not limited by the normal
prefetch limit; for large recordsets this would generate gigantic
prefetch lists for records we may not need at all.
Fix by applying the `PREFETCH_MAX` limit to records from the cache as is
done in `_prefetch_field`.
Complementarily, when traversing related fields the prefetch
environment would be lost and every record would get an empty prefetch
environment, so the values would ultimately be read one by one.
Example: select (search) 1000 product.product records, access a
related field (e.g. categ_id) in a loop, on the first iteration the
system would first read 1000 templates, then it would read each
categ_id individually, resulting in >1000 SQL queries rather than the
~2 we would expect.
Fixes#18511
In a form view, when a field onchange lead to a change on a x2many,
there was two different behavior:
- if the x2many had an embedded view (eg. a tree view inside a form
view) the onchange would notify that it expected the x2many field in
this embedded view to be changed and handled the changes correctly.
- if the x2many had a default view, the onchange ORM would not be
aware the x2many could be modified and would not sent the changes
back causing blank or not updated x2m lines and error on save.
---
Two solutions were birthed to solve the second point:
=> PR #10557 = solving everything
With this PR the onchange in the ORM is aware of every fields in the
current view (even field in a x2m in a x2m in a x2m in a form view) and
if any of these are change the javascript gets back the value of the
fields present in the view.
This PR has currently not been merged by fear of changing too much and
anyway could only be done in master.
=> PR #12249 = if no field for x2many, send its form view fields
With this change, if the ORM onchange is not aware of the fields in the
x2many widget to returns, all the field in the x2m default form view are
returned.
This was merged in bbdf960 but introduced a number of other issue:
- in most situation the x2many is represented by a list view, which may
have fields missing of the form view, so the original is still present.
- the view used may differ from the default form view in other way
(depending on value in context or other possibilities).
- the form view could have fields not present in the form view which
could end up in `write` on fields which should not be written to.
---
This commit reverts bbdf960 and adapts a small part of #10557 so the
x2many with default view works as an embedded x2many. For more than one
level (eg. a x2many in a x2many) this would still not work but it is
only solvable by a PR such as #10557 which could only be targetted for
master.
With this commit:
- the list of fields sent to ORM onchange is computed at the first onchange
- the fields from a x2many field default view is sent for onchange
- the initial onchange on record creation is delayed to when x2many are loaded
closes#12249, closes#15336, closes#15890fixes#11236, fixes#12249, fixes#15129, #15419
opw-705965 opw-716095 opw-715619 opw-710440
The fields objects are responsible for creating their column/table and indexes.
The methods that update the schema are overridden to handle cases specific to
each type of field.
Simplify the API as much as possible, and delegate all the implementation
details to the models `ir.model`, `ir.model.fields`, `ir.model.constraint` and
`ir.model.relation`.
This removal has led to a necessary refactoring:
- make the setup of field attributes extensible;
- make the instantiation of custom fields extensible;
- delegate model and field reflection to `ir.model` and `ir.model.fields`;
- move the implementation of sparse and serialized fields to module `base_sparse_field`;
Before this revision,
using a selection field with as possible keys `0`,
such as `require_payment` in `website_quote`,
resulted to the records field values to be stored
as `NULL` instead of `0` in the database.
This leads to the inability:
- To distinguish records with this selection field not set
or set to `0` (as both are stored as `NULL`)
- To search for records with the field set to `0`
(as they are considered not set)
For instance, while having `website_quote` installed,
search for sales orders with `Payment` set to
`Not mandatory on website quote validation`: It won't
return any result, even if you have some.
opw-697454
The dictionary `_group_by_full` is replaced by a field parameter `group_expand`
that is assigned to the method name. The API of the method has been simplified
as well:
@api.multi
def _read_group_stage_ids(self, domain, read_group_order=None, access_rights_uid=None):
# the stages are given by self.ids (wrong model);
# read_group_order is the order given to read_group() on self;
# return stages.name_get(), {stage.id: stage.fold)
_group_by_full = {'stage_id': _read_group_stage_ids}
is now written:
stage_id = fields.Many2one(..., group_expand='_read_group_stage_ids')
@api.model
def _read_group_stage_ids(self, stages, domain, order):
# stages is a recordset;
# order is the order to use on stages' model;
# return a recordset which is a superset of stages
Christophe Simonis