Experience installing from scratch (from github)

[jean]

We're starting from a vanilla Ubuntu Trusty image:

$ vagrant snapshot go start
$ vagrant ssh
vagrant@vagrant-ubuntu-trusty-64:~$ sudo apt-get install python-pip python-dev libssl-dev libzmq-dev libffi-dev git python-virtualenv
vagrant@vagrant-ubuntu-trusty-64:~/zerodb-server$ virtualenv venv
vagrant@vagrant-ubuntu-trusty-64:~/zerodb-server$ . venv/bin/activate
(venv)vagrant@vagrant-ubuntu-trusty-64:~/zerodb-server$ cd demo
(venv)vagrant@vagrant-ubuntu-trusty-64:~/zerodb-server/demo$ pip install -r requirements.txt
(venv)vagrant@vagrant-ubuntu-trusty-64:~/zerodb-server/demo$ zerodb-manage init_db
[...]
(venv)vagrant@vagrant-ubuntu-trusty-64:~/zerodb-server/demo$ zerodb-server &
(venv)vagrant@vagrant-ubuntu-trusty-64:~/zerodb-server/demo$ zerodb-manage console
In [1]: pubkey = get_pubkey('john', 'password')
In [2]: useradd('john', pubkey)
In [3]: import transaction
In [4]: import zerodb
In [5]: import models
---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
/home/vagrant/zerodb-server/venv/local/lib/python2.7/site-packages/zerodbext/server/manage.pyc in <module>()
----> 1 import models

ImportError: No module named models

In [6]: import sys
In [7]: sys.path.append('.')
In [8]: import models
In [9]: db = zerodb.DB(("localhost", 8001), username="root", password="root")
------
2016-07-14T10:46:50 INFO ZEO.zrpc.Connection('S') (127.0.0.1:34133) received handshake 'Z4'
ERROR:ZEO.zrpc.Connection('C'):(127.0.0.1:8001) invalidateTransaction() raised exception: 'BatchClientStorage' object has no attribute 'db'
Traceback (most recent call last):
  File "/home/vagrant/zerodb-server/venv/local/lib/python2.7/site-packages/ZEO/zrpc/connection.py", line 476, in handle_request
    ret = meth(*args)
  File "/home/vagrant/zerodb-server/venv/local/lib/python2.7/site-packages/ZEO/ClientStorage.py", line 1469, in invalidateTransaction
    self._process_invalidations(tid, oids)
  File "/home/vagrant/zerodb-server/venv/local/lib/python2.7/site-packages/zerodb/storage/batch.py", line 41, in _process_invalidations
    self._db.invalidate(tid, oids)
  File "/home/vagrant/zerodb-server/venv/local/lib/python2.7/site-packages/zc/zlibstorage/__init__.py", line 116, in invalidate
    return self.db.invalidate(transaction_id, oids, version)
  File "/home/vagrant/zerodb-server/venv/local/lib/python2.7/site-packages/zc/zlibstorage/__init__.py", line 53, in __getattr__
    return getattr(self.base, name)
AttributeError: 'BatchClientStorage' object has no attribute 'db'

In [10]: db
Out[10]: <zerodb.db.DB at 0x7f0b65bbc850>

In [11]: e = models.Employee(name="John", surname="Smith", salary=150000, descri
    ...: ption="Coding power")

In [12]: db.add(e)
ERROR:ZEO.zrpc.Connection('C'):(127.0.0.1:8001) invalidateTransaction() raised exception: 'BatchClientStorage' object has no attribute 'db'
Traceback (most recent call last):
  File "/home/vagrant/zerodb-server/venv/local/lib/python2.7/site-packages/ZEO/zrpc/connection.py", line 476, in handle_request
    ret = meth(*args)
  File "/home/vagrant/zerodb-server/venv/local/lib/python2.7/site-packages/ZEO/ClientStorage.py", line 1469, in invalidateTransaction
    self._process_invalidations(tid, oids)
  File "/home/vagrant/zerodb-server/venv/local/lib/python2.7/site-packages/zerodb/storage/batch.py", line 41, in _process_invalidations
    self._db.invalidate(tid, oids)
  File "/home/vagrant/zerodb-server/venv/local/lib/python2.7/site-packages/zc/zlibstorage/__init__.py", line 116, in invalidate
    return self.db.invalidate(transaction_id, oids, version)
  File "/home/vagrant/zerodb-server/venv/local/lib/python2.7/site-packages/zc/zlibstorage/__init__.py", line 53, in __getattr__
    return getattr(self.base, name)
AttributeError: 'BatchClientStorage' object has no attribute 'db'
Out[12]: 1604166222

In [13]: transaction.commit()
ERROR:ZEO.zrpc.Connection('C'):(127.0.0.1:8001) invalidateTransaction() raised exception: 'BatchClientStorage' object has no attribute 'db'
Traceback (most recent call last):
  File "/home/vagrant/zerodb-server/venv/local/lib/python2.7/site-packages/ZEO/zrpc/connection.py", line 476, in handle_request
    ret = meth(*args)
  File "/home/vagrant/zerodb-server/venv/local/lib/python2.7/site-packages/ZEO/ClientStorage.py", line 1469, in invalidateTransaction
    self._process_invalidations(tid, oids)
  File "/home/vagrant/zerodb-server/venv/local/lib/python2.7/site-packages/zerodb/storage/batch.py", line 41, in _process_invalidations
    self._db.invalidate(tid, oids)
  File "/home/vagrant/zerodb-server/venv/local/lib/python2.7/site-packages/zc/zlibstorage/__init__.py", line 116, in invalidate
    return self.db.invalidate(transaction_id, oids, version)
  File "/home/vagrant/zerodb-server/venv/local/lib/python2.7/site-packages/zc/zlibstorage/__init__.py", line 53, in __getattr__
    return getattr(self.base, name)
AttributeError: 'BatchClientStorage' object has no attribute 'db'

It looks like things are working in spite of the AttributeError.

[michwill]

As I said earlier, this is happening because you try to query the database from within management console (should be from a new python terminal).

Nevertheless, it will be possible when we allow multiple database instances for different users to exist at the same time https://github.com/zerodb/zerodb/issues/49

[jean]

Cool, thanks for the clarification! I didn't realise from the docs that this was supposed to be using a new Python terminal. If I understand correctly, this is no longer an issue anyway. :-)