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Examples of serialized objects

Examples of data serialized with Django's ​serialization framework.

These all use the Poll example from ​tutorial 1: 

 fromdjango.dbimport models
 classPoll(models.Model):
 question = models.CharField(maxlength=200)
 pub_date = models.DateTimeField('date published')
 classChoice(models.Model):
 poll = models.ForeignKey(Poll)
 choice = models.CharField(maxlength=200)
 votes = models.IntegerField()

XML

Though 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: 

<?xml version="1.0" encoding="utf-8"?>
<django-objectsversion="1.0">
<objectpk="1"model="myapp.poll">
<fieldtype="CharField"name="question">Whatisyourfavoritecolor?</field>
<fieldtype="DateTimeField"name="pub_date">2007年06月06日11:23:42</field>
</object>
<objectpk="2"model="myapp.poll">
<fieldtype="CharField"name="question">What'syourfavoritewebframework?</field>
<fieldtype="DateTimeField"name="pub_date">2007年06月06日11:24:17</field>
</object>
<objectpk="1"model="myapp.choice">
<fieldto="myapp.poll"name="poll"rel="ManyToOneRel">1</field>
<fieldtype="CharField"name="choice">Red</field>
<fieldtype="IntegerField"name="votes">5</field>
</object>
<objectpk="2"model="myapp.choice">
<fieldto="myapp.poll"name="poll"rel="ManyToOneRel">1</field>
<fieldtype="CharField"name="choice">Blue</field>
<fieldtype="IntegerField"name="votes">1</field>
</object>
<objectpk="3"model="myapp.choice">
<fieldto="myapp.poll"name="poll"rel="ManyToOneRel">1</field>
<fieldtype="CharField"name="choice">Pink...no,yellow...</field>
<fieldtype="IntegerField"name="votes">3</field>
</object>
<objectpk="4"model="myapp.choice">
<fieldto="myapp.poll"name="poll"rel="ManyToOneRel">2</field>
<fieldtype="CharField"name="choice">Django</field>
<fieldtype="IntegerField"name="votes">1000000</field>
</object>
<objectpk="5"model="myapp.choice">
<fieldto="myapp.poll"name="poll"rel="ManyToOneRel">2</field>
<fieldtype="CharField"name="choice">Rails</field>
<fieldtype="IntegerField"name="votes">0</field>
</object>
</django-objects>

JSON

Though XML is canonical, ​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. 

[
{
"pk":"1",
"model":"se.poll",
"fields":{
"pub_date":"2007年06月06日 11:23:42",
"question":"What is your favorite color?"
}
},
{
"pk":"2",
"model":"se.poll",
"fields":{
"pub_date":"2007年06月06日 11:24:17",
"question":"What's your favorite web framework?"
}
},
{
"pk":"1",
"model":"se.choice",
"fields":{
"votes":5,
"poll":1,
"choice":"Red"
}
},
{
"pk":"2",
"model":"se.choice",
"fields":{
"votes":1,
"poll":1,
"choice":"Blue"
}
},
{
"pk":"3",
"model":"se.choice",
"fields":{
"votes":3,
"poll":1,
"choice":"Pink... no, yellow..."
}
},
{
"pk":"4",
"model":"se.choice",
"fields":{
"votes":1000000,
"poll":2,
"choice":"Django"
}
},
{
"pk":"5",
"model":"se.choice",
"fields":{
"votes":0,
"poll":2,
"choice":"Rails"
}
}
]

YAML

Only available if ​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. 

- model: se.poll
 pk: '1'
 fields: 
 pub_date: !!timestamp '2007-06-06 11:23:42'
 question: 'What is your favorite color?'
- model: se.poll
 pk: '2'
 fields: 
 pub_date: !!timestamp '2007-06-06 11:24:17'
 question: 'What''s your favorite web framework?'
- model: se.choice
 pk: '1'
 fields: 
 choice: Red
 poll: 1
 votes: 5
- model: se.choice
 pk: '2'
 fields: 
 choice: Blue
 poll: 1
 votes: 1
- model: se.choice
 pk: '3'
 fields: 
 choice: 'Pink... no, yellow...'
 poll: 1
 votes: 3
- model: se.choice
 pk: '4'
 fields: 
 choice: Django
 poll: 2
 votes: 1000000
- model: se.choice
 pk: '5'
 fields: 
 choice: Rails
 poll: 2
 votes: 0
Last modified 18 years ago Last modified on Jun 6, 2007, 3:50:15 PM
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