Can not handle data by integer eid

[wolfg1969]

The id of the element will change to a unicode string after JSON serialization/deserialization. This causes no way to get the element by integer eid.

Python 2.7.6 (default, Sep  9 2014, 15:04:36)
[GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.39)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from tinydb import TinyDB
>>> db=TinyDB('/tmp/test.json')
>>> db.insert({'foo':'bar'})
1
>>> db.all()
[{u'foo': u'bar'}]
>>> element = db.all()[0]
>>> element.eid
u'1'
>>> assert db.get(eid=1) is not None
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AssertionError
>>> assert db.get(eid='1') is not None
>>> db.update({'foo':'blah'}, eids=[1])
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/wolfg/.virtualenvs/opensource/lib/python2.7/site-packages/tinydb/database.py", line 335, in update
    cond, eids)
  File "/Users/wolfg/.virtualenvs/opensource/lib/python2.7/site-packages/tinydb/database.py", line 222, in process_elements
    func(data, eid)
  File "/Users/wolfg/.virtualenvs/opensource/lib/python2.7/site-packages/tinydb/database.py", line 334, in <lambda>
    self.process_elements(lambda data, eid: data[eid].update(fields),
KeyError: 1
>>> db.update({'foo':'blah'}, eids=['1'])
>>> db.all()
[{u'foo': u'blah'}]
>>> db.contains(eids=[1])
False
>>> db.contains(eids=['1'])
True

[eugene-eeo]

Strange, I thought this behaviour was fixed in one of the commits. Would you be able to submit a pull request fixing this? It'll be trivial to implement, you might as well add a regression test along the way.

[wolfg1969]

Okay. I'd like to fix it. Could you show me the previous commit?

[eugene-eeo]

Sorry, apparently I was mistaken, there is no commit that addresses this issue. But you should go ahead and fix it anyways.