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Project Description

As a result of frustration working with colander, I decided to create something similar…

Objective is a de/serialization tool with following features:

  • declarative definition of objectives.
  • no confusion about how to define something, it is always the same.
  • reuse definitions by inheritance.
  • optional validation.
  • make it simple to override certain parts.

Usage

Simple mapping and validation

import objective
import datetime


now = datetime.datetime(2001, 9, 11)


class UserObjective(objective.Mapping):

    name = objective.Item(objective.Unicode, missing=objective.Ignore)
    email = objective.Item(objective.Unicode, validator=objective.Email())
    password = objective.Item(objective.Unicode)
    since = objective.Item(objective.UtcDateTime, missing=now)


serialized = {
    'email': 'foo@example.com',
    'password': 'foobar'
}


deserialized = UserObjective.deserialize(serialized)


assert deserialized == {
    'password': u'foobar',
    'email': u'foo@example.com',
    'since': datetime.datetime(2001, 9, 11, 0, 0)
}


bad_serialized = {
    'name': 'foobar'
}


try:
    deserialized = UserObjective().deserialize(bad_serialized)

except objective.Invalid as e:

    assert isinstance(e, objective.exc.InvalidChildren)
    assert {(x.node.__name__, x.__class__, x.value) for x in e.children} == {
        ('password', objective.exc.MissingValue, objective.values.Undefined),
        ('email', objective.exc.InvalidValue, 'baz')
    }

Mapping complex structures

import objective


class ProductRequestObjective(objective.BunchMapping):
    @objective.Item()
    class body(objective.Mapping):
        name = objective.Item(objective.Unicode)
        root = objective.Item(objective.Unicode)

        @objective.Item()
        class semantics(objective.List):
            items = objective.Item(objective.Unicode)

    @objective.Item()
    class match(objective.Mapping):
        _id = objective.Item(objective.Field)

Issues, thoughts, ideas

objective is far from complete. There are tons of possible validators I can imagine.

I tried my best (mostly in terms of time) to test.

If you find bugs or you have a great idea, I am totally open to implement it.

Release History

Release History

0.0.10

This version

History Node

TODO: Figure out how to actually get changelog content.

Changelog content for this version goes here.

Donec et mollis dolor. Praesent et diam eget libero egestas mattis sit amet vitae augue. Nam tincidunt congue enim, ut porta lorem lacinia consectetur. Donec ut libero sed arcu vehicula ultricies a non tortor. Lorem ipsum dolor sit amet, consectetur adipiscing elit.

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0.0.9

History Node

TODO: Figure out how to actually get changelog content.

Changelog content for this version goes here.

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0.0.8

History Node

TODO: Figure out how to actually get changelog content.

Changelog content for this version goes here.

Donec et mollis dolor. Praesent et diam eget libero egestas mattis sit amet vitae augue. Nam tincidunt congue enim, ut porta lorem lacinia consectetur. Donec ut libero sed arcu vehicula ultricies a non tortor. Lorem ipsum dolor sit amet, consectetur adipiscing elit.

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0.0.7

History Node

TODO: Figure out how to actually get changelog content.

Changelog content for this version goes here.

Donec et mollis dolor. Praesent et diam eget libero egestas mattis sit amet vitae augue. Nam tincidunt congue enim, ut porta lorem lacinia consectetur. Donec ut libero sed arcu vehicula ultricies a non tortor. Lorem ipsum dolor sit amet, consectetur adipiscing elit.

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0.0.6

History Node

TODO: Figure out how to actually get changelog content.

Changelog content for this version goes here.

Donec et mollis dolor. Praesent et diam eget libero egestas mattis sit amet vitae augue. Nam tincidunt congue enim, ut porta lorem lacinia consectetur. Donec ut libero sed arcu vehicula ultricies a non tortor. Lorem ipsum dolor sit amet, consectetur adipiscing elit.

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0.0.5

History Node

TODO: Figure out how to actually get changelog content.

Changelog content for this version goes here.

Donec et mollis dolor. Praesent et diam eget libero egestas mattis sit amet vitae augue. Nam tincidunt congue enim, ut porta lorem lacinia consectetur. Donec ut libero sed arcu vehicula ultricies a non tortor. Lorem ipsum dolor sit amet, consectetur adipiscing elit.

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
objective-0.0.10.tar.gz (8.6 kB) Copy SHA256 Checksum SHA256 Source Sep 29, 2016

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