Changes between Initial Version and Version 1 of SerializationExamples


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Timestamp:
Jun 6, 2007, 11:37:19 AM (18 years ago)
Author:
Jacob
Comment:

Some examples of what serialized documents look like.

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  • SerializationExamples

    v1 v1  
     1= Examples of serialized objects =
     2
     3Examples of data serialized with Django's [http://www.djangoproject.com/documentation/serialization/ serialization framework].
     4
     5These all use the {{{Poll}}} example from [http://www.djangoproject.com/documentation/tutorial01/ tutorial 1]:
     6
     7{{{
     8#!python
     9    from django.db import models
     10
     11    class Poll(models.Model):
     12        question = models.CharField(maxlength=200)
     13        pub_date = models.DateTimeField('date published')
     14
     15    class Choice(models.Model):
     16        poll = models.ForeignKey(Poll)
     17        choice = models.CharField(maxlength=200)
     18        votes = models.IntegerField()
     19}}}
     20
     21== XML ==
     22
     23Though it's the most verbose, the XML format is considered somewhat canonical; all the other formats leave out some of the aspects of the XML format:
     24
     25{{{
     26#!xml
     27<?xml version="1.0" encoding="utf-8"?>
     28<django-objects version="1.0">
     29  <object pk="1" model="myapp.poll">
     30    <field type="CharField" name="question">What is your favorite color?</field>
     31    <field type="DateTimeField" name="pub_date">2007-06-06 11:23:42</field>
     32  </object>
     33  <object pk="2" model="myapp.poll">
     34    <field type="CharField" name="question">What's your favorite web framework?</field>
     35    <field type="DateTimeField" name="pub_date">2007-06-06 11:24:17</field>
     36  </object>
     37  <object pk="1" model="myapp.choice">
     38    <field to="myapp.poll" name="poll" rel="ManyToOneRel">1</field>
     39    <field type="CharField" name="choice">Red</field>
     40    <field type="IntegerField" name="votes">5</field>
     41  </object>
     42  <object pk="2" model="myapp.choice">
     43    <field to="myapp.poll" name="poll" rel="ManyToOneRel">1</field>
     44    <field type="CharField" name="choice">Blue</field>
     45    <field type="IntegerField" name="votes">1</field>
     46  </object>
     47  <object pk="3" model="myapp.choice">
     48    <field to="myapp.poll" name="poll" rel="ManyToOneRel">1</field>
     49    <field type="CharField" name="choice">Pink... no, yellow...</field>
     50    <field type="IntegerField" name="votes">3</field>
     51  </object>
     52  <object pk="4" model="myapp.choice">
     53    <field to="myapp.poll" name="poll" rel="ManyToOneRel">2</field>
     54    <field type="CharField" name="choice">Django</field>
     55    <field type="IntegerField" name="votes">1000000</field>
     56  </object>
     57  <object pk="5" model="myapp.choice">
     58    <field to="myapp.poll" name="poll" rel="ManyToOneRel">2</field>
     59    <field type="CharField" name="choice">Rails</field>
     60    <field type="IntegerField" name="votes">0</field>
     61  </object>
     62</django-objects>
     63}}}
     64
     65== JSON ==
     66
     67Though XML is canonical, [http://json.org JSON] is probably more useful for everyday use. There's not a lot of metadata, but if you know what the objects are, it works great.
     68
     69{{{
     70    [
     71      {
     72        "pk": "1",
     73        "model": "se.poll",
     74        "fields": {
     75          "pub_date": "2007-06-06 11:23:42",
     76          "question": "What is your favorite color?"
     77        }
     78      },
     79      {
     80        "pk": "2",
     81        "model": "se.poll",
     82        "fields": {
     83          "pub_date": "2007-06-06 11:24:17",
     84          "question": "What's your favorite web framework?"
     85        }
     86      },
     87      {
     88        "pk": "1",
     89        "model": "se.choice",
     90        "fields": {
     91          "votes": 5,
     92          "poll": 1,
     93          "choice": "Red"
     94        }
     95      },
     96      {
     97        "pk": "2",
     98        "model": "se.choice",
     99        "fields": {
     100          "votes": 1,
     101          "poll": 1,
     102          "choice": "Blue"
     103        }
     104      },
     105      {
     106        "pk": "3",
     107        "model": "se.choice",
     108        "fields": {
     109          "votes": 3,
     110          "poll": 1,
     111          "choice": "Pink... no, yellow..."
     112        }
     113      },
     114      {
     115        "pk": "4",
     116        "model": "se.choice",
     117        "fields": {
     118          "votes": 1000000,
     119          "poll": 2,
     120          "choice": "Django"
     121        }
     122      },
     123      {
     124        "pk": "5",
     125        "model": "se.choice",
     126        "fields": {
     127          "votes": 0,
     128          "poll": 2,
     129          "choice": "Rails"
     130        }
     131      }
     132    ]
     133}}}
     134
     135== YAML ==
     136
     137Only available if [http://pyyaml.org PyYAML] is installed, this holds mostly the same data as the JSON serializer. However, YAML's probably easier to write by hand, so it's the most useful for fixtures.
     138
     139{{{
     140- model: se.poll
     141  pk: '1'
     142  fields:
     143      pub_date: !!timestamp '2007-06-06 11:23:42'
     144      question: 'What is your favorite color?'
     145- model: se.poll
     146  pk: '2'
     147  fields:
     148      pub_date: !!timestamp '2007-06-06 11:24:17'
     149      question: 'What''s your favorite web framework?'
     150- model: se.choice
     151  pk: '1'
     152  fields:
     153    choice: Red
     154    poll: 1
     155    votes: 5
     156- model: se.choice
     157  pk: '2'
     158  fields:
     159      choice: Blue
     160      poll: 1
     161      votes: 1
     162- model: se.choice
     163  pk: '3'
     164  fields:
     165      choice: 'Pink... no, yellow...'
     166      poll: 1
     167      votes: 3
     168- model: se.choice
     169  pk: '4'
     170  fields:
     171      choice: Django
     172      poll: 2
     173      votes: 1000000
     174- model: se.choice
     175  pk: '5'
     176  fields:
     177      choice: Rails
     178      poll: 2
     179      votes: 0
     180}}}
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