Re: Problem with an OrderedDict

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On Mon, 2 Mar 2015 20:05:30 +0100
Irmen de Jong <[email protected]> wrote:

> > So, is it possible to fix this issue and how?
> > 
> 
> Sure, your example code already contains the solution: just pass the
> item list instead of the OrderedDict itself.  ( od.items() )
> 
> And on the client side, reconstruct the OrderedDict directly from the
> item list.

This is working well on a single level, however it also breaks as my
OD is a tree, i.e.:

mydb--schemas--public------+----functions----
          +----common      +----tables----table1
	  +----client              +------table2----rights
                                             +------col1----rights
                                             +------col2----rights
                                                      +-----integer
and so on.


I use it to retrieve all DBAs DBs objects schema, names, perms, etc, 
then I also use it to do the same for a regular user,
send it to he's client,
the client auto-adapt to this OD (ie: hide some parts of itself),
it also use it to send table/view + columns to rpc svr for queries
 (but the column order can be altered),
etc...

However, my first tests used a Storage() (modified dict shamelessy
stolen from Massimo Di Piero's web2py - see attachment) that was
combined with lists. Unfortunately, it returns to a regular dict
when serz/deserz by serpent.
The big advantage is the point notation, eliminating 80% of dicts blurb
(you don't: d['stuff']['thing'] but d.stuff.thing which is much easier
to build/process).
It would be easier if Storage() was preserved by serpent.

At this point, the only option I see is boring (work with many lists and
relying on indices from one list to another to rebuild the
arborescence).

Jean-Yves


 there may be a possible issue to
that: if Pyro4 could correctly serialize 
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# -*- coding: utf-8 -*-

# Part of web2py Web Framework (Copyrighted, 2007)
# Developed by Massimo Di Pierro <[email protected]>

# Code shamelessly stollen from Massimo because it is very useful ;-)

# This line tells the interpreter to only import the content of __all__
# while 'from <module> import *'.  Mainly used when we don't want
# other PGMs to automatically import some of this file's classes/methods.
# If we want to explicitely use, lets say XYZ, from this file, it could
# be done by wether explicit call: 'storage.XYZ' or explicit import
# 'from storage import XYZ'.
__all__=['Storage']

class Storage(dict):
    """
    A Storage object is like a dictionary except `obj.foo` can be used
    in addition to `obj['foo']`.

        >>> o = Storage(a=1)
        >>> o.a
        1
        >>> o['a']
        1
        >>> o.a = 2
        >>> o['a']
        2
        >>> del o.a
        >>> o.a
        None
    """

    def __getattr__(self, key): 
        try: return self[key]
        except KeyError, k: return None

    def __setattr__(self, key, value): 
        self[key] = value

    def __delattr__(self, key):
        try: del self[key]
        except KeyError, k: raise AttributeError, k

    def __repr__(self):     
        return '<Storage ' + dict.__repr__(self) + '>'

    def __getstate__(self): 
        return dict(self)

    def __setstate__(self,value):
        for k,v in value.items(): self[k]=v


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