pyramid-cookiecutter-zodb

Deprecation notice

This cookiecutter has been deprecated in favor of the unified cookiecutter pyramid-cookiecutter-starter effective with the release of Pyramid 1.10. pyramid-cookiecutter-starter combines all features of pyramid-cookiecutter-alchemy and pyramid-cookiecutter-zodb. Please use pyramid-cookiecutter-starter instead of this one. This cookiecutter may not receive further updates.

A Cookiecutter (project template) for creating a Pyramid project using ZODB for persistent storage, traversal for routing, and Chameleon for templating.

Requirements

Python 2.7 or 3.4+
cookiecutter

Versions

This cookiecutter has several branches to support new features in Pyramid or avoid incompatibilities.

latest aligns with the latest stable release of Pyramid, and is the default branch on GitHub.
master aligns with the master branch of Pyramid, and is where development takes place.
x.y-branch aligns with the x.y-branch branch of Pyramid.

Usage

Generate a Pyramid project, following the prompts from the command.
```
$ cookiecutter gh:Pylons/pyramid-cookiecutter-zodb
```
Optionally append a specific branch checkout to the command:
```
$ cookiecutter gh:Pylons/pyramid-cookiecutter-zodb --checkout master
```

Finish configuring the project by creating a virtual environment and installing your new project. These steps are output as part of the cookiecutter command above and are slightly different for Windows.

# Change directory into your newly created project.
$ cd myproj
# Create a virtual environment...
$ python3 -m venv env
# ...where we upgrade packaging tools...
$ env/bin/pip install --upgrade pip setuptools
# ...and into which we install our project and its testing requirements.
$ env/bin/pip install -e ".[testing]"

Run your project's tests.
```
$ env/bin/pytest
```
Run your project.
```
$ env/bin/pserve development.ini
```

pshell raises NoTransaction exception in a project that has no database files (yet)

Following what I've found in the ZODB wiki traveral tutorial (https://docs.pylonsproject.org/projects/pyramid/en/latest/tutorials/wiki/index.html), I've installed cookiecutter and did:

cookiecutter gh:Pylons/pyramid-cookiecutter-zodb --checkout 1.9-branch

Then, without done any changes, tried to open a shell on the project:

pshell development.ini

Got this traceback:

$ pshell development.ini
2017-10-21 08:58:41,941 INFO  [chameleon.config:38][MainThread] directory cache: /home/wu/pyramid-zodb-traversal/chameleon.
Traceback (most recent call last):
  File "/home/wu/pyramid-zodb-traversal/envs/testapp/bin/pshell", line 11, in <module>
    sys.exit(main())
  File "/home/wu/pyramid-zodb-traversal/envs/testapp/lib/python3.6/site-packages/pyramid/scripts/pshell.py", line 19, in main
    return command.run()
  File "/home/wu/pyramid-zodb-traversal/envs/testapp/lib/python3.6/site-packages/pyramid/scripts/pshell.py", line 124, in run
    env = self.bootstrap(config_uri, options=config_vars)
  File "/home/wu/pyramid-zodb-traversal/envs/testapp/lib/python3.6/site-packages/pyramid/paster.py", line 108, in bootstrap
    env = prepare(request)
  File "/home/wu/pyramid-zodb-traversal/envs/testapp/lib/python3.6/site-packages/pyramid/scripting.py", line 98, in prepare
    root = root_factory(request)
  File "/home/wu/pyramid-zodb-traversal/repos/Testapp/testapp/__init__.py", line 14, in root_factory
    return appmaker(conn.root())
  File "/home/wu/pyramid-zodb-traversal/repos/Testapp/testapp/models/__init__.py", line 18, in appmaker
    zodb_root['app_root'] = app_root
  File "/home/wu/pyramid-zodb-traversal/envs/testapp/lib/python3.6/site-packages/persistent/mapping.py", line 64, in __setitem__
    self._p_changed = 1
  File "/home/wu/pyramid-zodb-traversal/envs/testapp/lib/python3.6/site-packages/ZODB/Connection.py", line 835, in register
    self._register(obj)
  File "/home/wu/pyramid-zodb-traversal/envs/testapp/lib/python3.6/site-packages/ZODB/Connection.py", line 845, in _register
    self.transaction_manager.get().join(self)
  File "/home/wu/pyramid-zodb-traversal/envs/testapp/lib/python3.6/site-packages/transaction/_manager.py", line 87, in get
    raise NoTransaction()
transaction.interfaces.NoTransaction
$

Tried pserve instead:

pserve --reload development.ini

and the app seemed to be "started" right:

$ pserve --reload development.ini
Starting monitor for PID 61548.
2017-10-21 09:03:53,546 INFO  [chameleon.config:38][MainThread] directory cache: /home/wu/pyramid-zodb-traversal/chameleon.
Starting server in PID 61548.
Serving on http://localhost:6543
Serving on http://localhost:6543
$

After that, the ZODB database files are there:

$ ls -l Data.*
-rw-r--r--  1 wu  wu   166 Oct 21 09:03 Data.fs
-rw-r--r--  1 wu  wu     9 Oct 21 09:03 Data.fs.index
-rw-r--r--  1 wu  wu     7 Oct 21 09:03 Data.fs.lock
-rw-r--r--  1 wu  wu   106 Oct 21 09:03 Data.fs.tmp
$

(hint, look at the database - Data.fs - size)

After that I tried pshell again and I got the same traceback but, after
started pserve again, I opened http://localhost:6543 in a browser (got there
the pyramid welcome page). Then I looked at the database files again:

$ ls -l Data.*
-rw-r--r--  1 wu  wu   456 Oct 21 09:04 Data.fs
-rw-r--r--  1 wu  wu    31 Oct 21 09:03 Data.fs.index
-rw-r--r--  1 wu  wu     7 Oct 21 09:03 Data.fs.lock
-rw-r--r--  1 wu  wu   258 Oct 21 09:04 Data.fs.tmp
$

and then I did stop pserve and tried pshell:

$ pshell development.ini
2017-10-21 09:04:18,005 INFO  [chameleon.config:38][MainThread] directory cache: /home/wu/pyramid-zodb-traversal/chameleon.
Python 3.6.1 (default, Jun 29 2017, 15:42:29)
[GCC 4.2.1 20070719 ] on openbsd6
Type "help" for more information.

Environment:
  app          The WSGI application.
  registry     Active Pyramid registry.
  request      Active request object.
  root         Root of the default resource tree.
  root_factory Default root factory used to create `root`.

>>>

It worked just fine.

So, something is preventing pshell from working on a project that still has no
database (which worked fine in previous versions, as I've been using
pyramid+zodb for years now without this issue)

I was wondering if this could be related to issue #22, which removed some
transaction commits when calling the appmaker code...

pylons / pyramid-cookiecutter-zodb Goto Github PK