This is exactly what you want. Try this:
   

    {{ wpis.entry.lastChangeDate|date:&#39;Y-m-d H:i&#39; }}

You can use this: 

`addedDate = datetime.now().replace(microsecond=0)`


I suspect `wpis.entry.lastChangeDate` has been somehow transformed into a string in the view, before arriving to the template.

In order to verify this hypothesis, you may just check in the view if it has some property/method that only strings have - like for instance `wpis.entry.lastChangeDate.upper`, and then see if the template crashes.

You could also create your own [custom filter][1], and use it for debugging purposes, letting it inspect the object, and writing the results of the inspection on the page, or simply on the console. It would be able to inspect the object, and check if it is really a DateTimeField.

On an unrelated notice, why don&#39;t you use `models.DateTimeField(`[**`auto_now_add`**][2]`=True)` to set the datetime on creation?


  [1]: http://docs.djangoproject.com/en/dev/howto/custom-template-tags/#writing-custom-template-filters
  [2]: http://docs.djangoproject.com/en/dev/ref/models/fields/#django.db.models.DateField.auto_now_add

```{{ wpis.entry.lastChangeDate|date:&quot;SHORT_DATETIME_FORMAT&quot; }}```&lt;br/&gt;
Replace **SHORT_DATETIME_FORMAT** with the date and/or time format you desire to use.

Here&#39;s a list of available date and time formats to use in Django templates :
https://docs.djangoproject.com/en/4.0/ref/templates/builtins/#date
https://docs.djangoproject.com/en/4.0/ref/templates/builtins/#time

Make sure the filter is applied to the correct field.

Do I really need to implement it myself?

    private void shrinkListTo(ArrayList&lt;Result&gt; list, int newSize) {
      for (int i = list.size() - 1; i &gt;= newSize; --i)
      list.remove(i);
    }

Shrinking an ArrayList to a new size

Is there anyway to check if an enum exists by comparing it to a given string? I can&#39;t seem to find any such function. I could just try to use the `valueOf` method and catch an exception but I&#39;v been taught that catching runtime exceptions is not good practice. Anybody have any ideas?

Check if enum exists in Java

That: 

    {{ wpis.entry.lastChangeDate|date:&quot;D d M Y&quot; }}

gives me (why?):

    2009-07-24 21:45:38.986156 

and i don&#39;t know how to skip fraction part... 

In my model i have:

    addedDate = models.DateTimeField(default=datetime.now)


How to format dateTime in django template?

That:
<pre><code class="hljs language-bash">{{ wpis.entry.lastChangeDate|date:"D d M Y" }}
</code></pre>
gives me (why?):
<pre><code class="hljs language-yaml">2009-07-24 21:45:38.986156 
</code></pre>
and i don't know how to skip fraction part...
In my model i have:
<pre><code class="hljs language-ini">addedDate = models.DateTimeField(default=datetime.now)
</code></pre>

I can&#39;t find it anywhere, so your help will be nice for me :) Here is that field:

    categories = models.ManyToManyField(fragmentCategory)

FragmentCategory:

    class fragmentCategory(models.Model):
	
	        CATEGORY_CHOICES = (
		                    (&#39;val1&#39;, &#39;value1&#39;),
		                    (&#39;val2&#39;, &#39;value2&#39;),
		                    (&#39;val3&#39;, &#39;value3&#39;),
	                        )
	
	        name = models.CharField(max_length=20, choices=CATEGORY_CHOICES)

Here is the form to send:

    &lt;input type=&quot;checkbox&quot; name=&quot;val1&quot; /&gt;
    &lt;input type=&quot;checkbox&quot; name=&quot;val2&quot; /&gt;
    &lt;input type=&quot;checkbox&quot; name=&quot;val3&quot; /&gt;

-------------------------------
I tried something like this: 

    categories = fragmentCategory.objects.get(id=1),
Or:

    categories = [1,2]


How to add data into ManyToMany field?

I have a small typography related templatetag library that I use on almost every page. Right now I need to load it for each template using

    {% load nbsp %}

Is there a way to load it &quot;globally&quot; for all views and templates at once? Putting the load tag into a base template doesn&#39;t work.

Load a Django template tag library for all views by default

How can I make the development server from django running permanent? So that it does&#39;t stop when I quit the shell.

Thanks

Django runserver permanent

I&#39;m trying to set up my uploads so that if user joe uploads a file it goes to MEDIA_ROOT/joe as opposed to having everyone&#39;s files go to MEDIA_ROOT. The problem is I don&#39;t know how to define this in the model. Here is how it currently looks:

    class Content(models.Model):
        name = models.CharField(max_length=200)
        user = models.ForeignKey(User)
        file = models.FileField(upload_to=&#39;.&#39;)

So what I want is instead of &#39;.&#39; as the upload_to, have it be the user&#39;s name.

I understand that as of Django 1.0 you can define your own function to handle the upload_to but that function has no idea of who the user will be either so I&#39;m a bit lost.

Thanks for the help!

Django FileField with upload_to determined at runtime

How do I have actions occur when a field gets changed in one of my models?  In this particular case, I have this model:

    class Game(models.Model):
        STATE_CHOICES = (
            (&#39;S&#39;, &#39;Setup&#39;),
            (&#39;A&#39;, &#39;Active&#39;),
            (&#39;P&#39;, &#39;Paused&#39;),
            (&#39;F&#39;, &#39;Finished&#39;)
            )
        name = models.CharField(max_length=100)
        owner = models.ForeignKey(User)
        created = models.DateTimeField(auto_now_add=True)
        started = models.DateTimeField(null=True)
        state = models.CharField(max_length=1, choices=STATE_CHOICES, default=&#39;S&#39;)

and I would like to have Units created, and the &#39;started&#39; field populated with the current datetime (among other things), when the state goes from Setup to Active.

I suspect that a model instance method is needed, but the docs don&#39;t seem to have much to say about using them in this manner.

**Update:** I&#39;ve added the following to my Game class:

        def __init__(self, *args, **kwargs):
            super(Game, self).__init__(*args, **kwargs)
            self.old_state = self.state

        def save(self, force_insert=False, force_update=False):
            if self.old_state == &#39;S&#39; and self.state == &#39;A&#39;:
                self.started = datetime.datetime.now()
            super(Game, self).save(force_insert, force_update)
            self.old_state = self.state


Actions triggered by field change in Django

Ok, I&#39;ve tried about near everything and I cannot get this to work.

 - I have a Django model with an ImageField on it
 - I have code that downloads an image via HTTP (tested and works)
 - The image is saved directly into the &#39;upload_to&#39; folder (the upload_to being the one that is set on the ImageField)
 - All I need to do is associate the already existing image file path with the ImageField

I&#39;ve written this code about 6 different ways.


The problem I&#39;m running into is all of the code that I&#39;m writing results in the following behavior:
(1) Django will make a 2nd file, (2) rename the new file, adding an _ to the end of the file name, then (3) not transfer any of the data over leaving it basically an empty re-named file.  What&#39;s left in the &#39;upload_to&#39; path is 2 files, one that is the actual image, and one that is the name of the image,but is empty, and of course the ImageField path is set to the empty file that Django try to create.

In case that was unclear, I&#39;ll try to illustrate:

    ## Image generation code runs.... 
    /Upload
         generated_image.jpg     4kb

    ## Attempt to set the ImageField path...
    /Upload
         generated_image.jpg     4kb
         generated_image_.jpg    0kb

    ImageField.Path = /Upload/generated_image_.jpg


How can I do this without having Django try to re-store the file?  What I&#39;d really like is something to this effect...

    model.ImageField.path = generated_image_path

...but of course that doesn&#39;t work.

And yes I&#39;ve gone through the other questions here like [this one][1] as well as the django doc on [File][2]

**UPDATE**
After further testing, it only does this behavior when running under Apache on Windows Server.  While running under the &#39;runserver&#39; on XP it does not execute this behavior. 

I am stumped.

Here is the code which runs successfully on XP...

    f = open(thumb_path, &#39;r&#39;)
    model.thumbnail = File(f)
    model.save()

  [1]: https://stackoverflow.com/questions/811167/how-to-manually-assign-imagefield-in-django
  [2]: http://docs.djangoproject.com/en/dev/ref/files/file/#django.core.files.File.save

Programmatically saving image to Django ImageField

I want to call a function from my model at a template such  as:

    class ChannelStatus(models.Model):
     ..............................
     ..............................
    
    	def get_related_deltas(self,epk):
    		mystring = &quot;&quot;
    		if not self.get_error_code_delta(epk):
    			return mystring
    		else:
    			for i in self.get_listof_outage():
    				item = i.error_code.all()
    				for x in item:
    					if epk == x.id:
    						mystring= mystring +&quot; &quot;+str(i.delta())
    		return mystring			

	

And when I want to call this from the template:
assume  while rendering, I pass channel_status_list as 

    channel_status_list = ChannelStatus.objects.all()

    {% for i in channel_status_list %}
      {{ i.get_related_deltas(3) }}
    {% endfor %}

This doesn&#39;t work, I am able to call a function that consumes nothing, but couln&#39;t find what to do if it has parameter(s)

Cheers

Content Type	Original Author	Original Content on Stackoverflow
Question	IProblemFactory	View Question on Stackoverflow
Solution 1 - Django	Rockystech	View Answer on Stackoverflow
Solution 2 - Django	Coc B.	View Answer on Stackoverflow
Solution 3 - Django	rob	View Answer on Stackoverflow
Solution 4 - Django	Rodrigo Camargos	View Answer on Stackoverflow

How to format dateTime in django template?

Django Problem Overview

Django Solutions

Solution 1 - Django

Solution 2 - Django

Solution 3 - Django

Solution 4 - Django

Check if enum exists in Java

Shrinking an ArrayList to a new size

Attributions