[web] Only log exceptions in debug mode in Ajax controllers When we raise a RemoteCallFailed error (erroneously turned into a '500 Internal Server Error' response, but that's another business). In production environment, we do not want to log the exception in most cases where it's actually a client error. So only log the exception in debug mode.

[pyramid] Only expose 'cubicweb.bwcompat' setting for "all-in-one" configuration type The "pyramid" instance configuration does not work with "cubiwceb.bwcompat" mode (on purpose). Yet, having the setting exposed in development.ini file (generate by `cubicweb-ctl create --config pyramid <cube> <instance>` command) is misleading and we want to remove it. Thus, we only query this setting when cubicweb configuration is "all-in-one" and drop the setting line from templated development.ini file. If the option is found and True for any other configuration type, we issue a user warning (and ignore the option).

[migration] Only drop moved table entities if it does not exists For very old instances (namely docaster), this table has never been created.

[web/views] delete: show composite entities in predictible order Iterate over relations type in alphabetical order, so the order is predictible dans does not depend on PYTHONHASHSEED.

[req] fix find() generating non-rewritable rql on non final relations When filtering on a relation, find() was generating rql like 'Any X WHERE X is ETYPE, X relation EID' which work without being rewritten (it should probably not), but when applying some rewrite (eg. permissions) it raise in rqlrewrite code. def _use_orig_term(self, snippet_varname, term): ... > self.rewritten[key] = term.name E AttributeError: 'Constant' object has no attribute 'name' Generate valid rql instead 'Any X WHERE X is ETYPE, X relation Y, Y eid EID'.

[req] raise KeyError instead of AssertionError in req.find()

[req] use format() instead of % substitution For readability, avoid escaping using %% and use format() instead.

[test] make assertions on exception message

[req] clearer exception message Display what attribute trigger the NotImplementedError

[cleanup] Drop useless fake function actually not necessary.

[cleanup] Use plain unittest main in unittest_rqlrewrite

[cleanup] Fix flake8 error unittest_rqlrewrite hard one!

[rqlrewrite] Enhance detection of need for Exists node We actually want one only if this is not a (`And` / `Or`) binary tree of `Not` or `Exists` nodes, so write a recursive function to tell so. Related to #17074119

[rqlrewrite] Fix rewrite on ambiguities introduced by NOT relation or "is IN" type restriction When some inserted RQL snippet generate more solutions than the original RQL, the rewriter attempt to duplicate the snippet for each newly introduced solution. There are though some cases where we do not want this behaviour in case of ambiguities introduced by: * NOT(X relation Y) expression, since it won't be equivalent to NOT(X relation Y1, Y1 is Type1) OR NOT(X relation Y2, Y2 is Type2) ; * EXISTS(X relation Y, Y is IN (Type1, Type2) expression, since it's not actually necessary to split an explicitly introduced ambiguity (and it crash if we attempt to do so, so...). In test, we've to modify the `rewrite()` function because in the newly introduced test we need the same constraint to be applied to two variables in the original query, and this was not supported before. Notice the generated RQL in test is still *NOT CORRECT* "(EXISTS(NOT EXISTS() OR EXISTS(...))", or at least isn't optimal. This will be fixed in a forthcoming changeset. Related to #17074119

[dataimport] Add explanation about why external entities can't be inserted By default after the import processed the importer indicates which external entities can't be inserted because they are missing dependency data (other entities, used in inlined or mandatory relations). It usually helps there to find out which extids / relations are missing, so add this to the log.