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POIs this an error in the documentation?
 

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  1. POIs this an error in the documentation?
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    <p>Today I started reading the documentation for <code>django.forms</code>. The API seems easy to use and I started experimenting with it. Then I started experimenting with <code>django.forms.ModelForm</code> but I cannot really see where I went wrong.</p> <p>My problem starts here: <a href="https://docs.djangoproject.com/en/1.4/topics/forms/modelforms/#the-save-method" rel="nofollow">the save method</a> when creating a <code>form</code> with an <code>instance</code>.</p> <p>My model is</p> <pre><code>class Process(models.Model): key = models.CharField(max_length=32, default="") name = models.CharField(max_length=30) path = models.CharField(max_length=215) author = models.CharField(max_length=100) canparse = models.NullBooleanField(default=False) last_exec = models.DateTimeField(null = True) last_stop = models.DateTimeField(null = True) last_change = models.DateTimeField(null = True, auto_now=True) </code></pre> <p>and my form is</p> <pre><code>class ProcessForm(ModelForm): class Meta: model = Process fields = ('name', 'path', 'author') </code></pre> <p>I only wanted the <code>name</code>, <code>path</code> and <code>author</code> fields since the other ones are automatically set when saving the model. Anyway, in my test database I already have entries and I've chosen one whose fields are <strong>all</strong> set and valid.</p> <p>In the documentation you can read:</p> <pre><code># Create a form to edit an existing Article. &gt;&gt;&gt; a = Article.objects.get(pk=1) &gt;&gt;&gt; f = ArticleForm(instance=a) &gt;&gt;&gt; f.save() </code></pre> <p>Very well, I wanted to do the same with my own code:</p> <pre><code>&gt;&gt;&gt; from remusdb.models import Process &gt;&gt;&gt; from monitor.forms import ProcessForm &gt;&gt;&gt; &gt;&gt;&gt; proc = Process.objects.get(name="christ") &gt;&gt;&gt; pf = ProcessForm(instance=proc) &gt;&gt;&gt; pf.save() Traceback (most recent call last): File "&lt;console&gt;", line 1, in &lt;module&gt; File "/home/shaoran/devpython/lib/python2.6/site-packages/django/forms/models.py", line 364, in save fail_message, commit, construct=False) File "/home/shaoran/devpython/lib/python2.6/site-packages/django/forms/models.py", line 87, in save_instance save_m2m() File "/home/shaoran/devpython/lib/python2.6/site-packages/django/forms/models.py", line 78, in save_m2m cleaned_data = form.cleaned_data AttributeError: 'ProcessForm' object has no attribute 'cleaned_data' &gt;&gt;&gt; pf.is_bound False &gt;&gt;&gt; pf.is_valid() False </code></pre> <p>Even though <code>proc</code> is a valid <code>Process</code> object the form object doesn't seem to agree with me. If I do as the next example</p> <pre><code>&gt;&gt;&gt; post = { "name": "blabla", "path": "/somewhere", "author": "me" } &gt;&gt;&gt; pf = ProcessForm(post, instance=proc) &gt;&gt;&gt; pf.is_bound True &gt;&gt;&gt; pf.is_valid() True &gt;&gt;&gt; pf.cleaned_data {'path': u'/somewhere', 'name': u'blabla', 'author': u'me'} </code></pre> <p>then it works like in third example of the documentation.</p> <p>Am I missing something or is there an error in the documentation? Or is my <code>Model</code> code somewhat wrong?</p> <p>This is the content of <code>proc</code></p> <blockquote> <blockquote> <blockquote> <p>proc.<strong>dict</strong> {'name': u'christ', 'last_stop': datetime.datetime(2012, 10, 5, 16, 49, 13, 630040, tzinfo=), 'author': u'unkown', '_state': , 'canparse': False, 'last_exec': datetime.datetime(2012, 10, 5, 16, 49, 8, 545626, tzinfo=), 'key': u'aed72c9d46d2318b99ffba930a110610', 'path': u'/home/shaoran/projects/cascade/remusdb/test/samples/christ.cnf', 'last_change': datetime.datetime(2012, 10, 5, 16, 49, 13, 631764, tzinfo=), 'id': 5}</p> </blockquote> </blockquote> </blockquote>
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    1. COCould you please write what is in proc you get exactly (maybe what proc.__dict__ returns)?
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    2. CO@jasisz: I've updated my original post with the contents of `proc.__dict__`
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    3. COWhat version of Django are you using?
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