[entities] cw_rest_attr_info() should only consider required attributes (closes #3766717)
This prevents CW from choosing unique but non-required attributes. None/NULL is
a poor choice for RESTful URIs.
.. _Tutorials:
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Tutorials
---------
We present two tutorials of different levels. The blog building
tutorial introduces one smoothly to the basic concepts.
Then there is a photo gallery construction tutorial which highlights
more advanced concepts such as unit tests, security settings,
migration scripts.
.. toctree::
:maxdepth: 1
:numbered:
base/index
advanced/index
tools/windmill.rst
textreports/index