[ssplanner] Prevent execution of write queries involving computed relations
Previously, setting a computed relation upon entity creation or
modification (using the ORM or an RQL query) would usually fail with an
operational error in the backend ("no such table"). However, under some
mysterious circumstances (like passing a string as value in cw_set for a
computed relation), the RQL to SQL transformation would simply drop the
clause.
To prevent this to happen, we add a check for computed relation before
adding a relation to an execution plan. This check raises a QueryError.
It happens in several places:
* in querier.InsertPlan.add_relation_def() (called from several places
in ssplanner steps) for INSERT queries,
* in ssplanner.UpdateStep.execute() for SET queries and,
* in ssplanner.SSplanner.build_delete_plan() for DELETE queries.
Tests added to unittest_querier.py because unittest_sslplanner.py looked
inappropriate (it has only unit tests) and the former already had a
NonRegressionTC class.
====
Book
====
----
Part
----
Chapter
=======
.. _Level1AnchorForLaterReference:
Level 1 section
---------------
Level 2 section
~~~~~~~~~~~~~~~
Level 3 section
```````````````
*CubicWeb*
inline directives:
:file:`directory/file`
:envvar:`AN_ENV_VARIABLE`
:command:`command --option arguments`
:ref:, :mod:
.. sourcecode:: python
class SomePythonCode:
...
.. XXX a comment, wont be rendered
a [foot note]_
.. [foot note] the foot note content
Boxes
=====
- warning box:
.. warning::
Warning content
- note box:
.. note::
Note content
Cross references
================
To arbitrary section
--------------------
:ref:`identifier` ou :ref:`label <identifier>`
Label required of referencing node which as no title, else the node's title will be used.
To API objects
--------------
See the autodoc sphinx extension documentation. Quick overview:
* ref to a class: :class:`cubicweb.devtools.testlib.AutomaticWebTest`
* if you can to see only the class name in the generated documentation, add a ~:
:class:`~cubicweb.devtools.testlib.AutomaticWebTest`
* you can also use :mod: (module), :exc: (exception), :func: (function), :meth: (method)...
* syntax explained above to specify label explicitly may also be used