There are two issues with the index naming convention used by the ORM:
Problem 1: it is possible to have naming conflict for indexes. For
instance, the name 'slide_channel_tag_group_sequence_index' is used for
both fields slide.channel.tag.group.sequence and
slide.channel.tag.group_sequence. Only the first index will be created.
Solution 1: we separate the model and field names with a double
underscore instead of a single one, which is the same strategy as with
LEFT JOIN aliases. This is correct because model names don't contain
such double underscores or underscores as prefix or suffix (it is not
forbiden but model name should follow the 'dot notation'.)
Problem 2: index names can be longer than 63 chars, but PostgreSQL
silently truncates it. This doesn't actually break anything (PostgreSQL
also truncates values when we check the existence of indexes) but it can
lead to using the same name twice. There is hopefully not any example
in our code.
Solution 2: if the name is too large, we truncate it and pad it with a
hash of the complete name to match 63 characters, which is also the
strategy used for LEFT JOIN aliases.
task-2984730
closesodoo/odoo#100736
Related: odoo/upgrade#3957
Signed-off-by: Raphael Collet <rco@odoo.com>
Rémy Voet (ryv)
0787f150b1