[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