    {% if field.field.required %}

From [this snippet](http://www.djangosnippets.org/snippets/474/)


I usually write out the html for each of my form elements, so I have a little more control over each one.  Then you can add an * for required or REQUIRED!!.  

    &lt;p&gt;&lt;label&gt;Title: *&lt;br /&gt;
    {% if form.title.errors %}&lt;ul class=&quot;errorlist&quot;&gt;{{ form.title.errors }}&lt;/ul&gt;{% endif %}
    {{form.title}}
    &lt;/label&gt;&lt;/p&gt;    
    
    &lt;p&gt;&lt;label&gt;Category:&lt;br /&gt;
    {% if form.category.errors %}&lt;ul class=&quot;errorlist&quot;&gt;{{ form.category.errors }}&lt;/ul&gt;{% endif %}
    {{form.category}}
    &lt;/label&gt;&lt;/p&gt;

Unicode has a million icon-like glyphs, but they&#39;re not always easy to search by, since I don&#39;t always know what they look like.

Is there a Unicode glyph that looks like a &quot;key&quot;?  Or is there a symbol that&#39;s used in database circles to mean &quot;primary key&quot;, which *is* in Unicode?


Is there a Unicode glyph that looks like a &quot;key&quot; icon?

I am storing all my dates in UTC format in my database. I ask the user for their timezone and I want to use their time zone plus what I am guessing is the server time to figure out the UTC for them. 

Once I have that I want to do a search to see what the range is in the database using their newly converted UTC date.

But I always get this exception.

    System.ArgumentException was unhandled by user code  
    Message=&quot;The conversion could not be completed because the   
    supplied DateTime did not have the Kind property set correctly.  
    For example, when the Kind property is DateTimeKind.Local,   
    the source time zone must be TimeZoneInfo.Local.  
    Parameter name: sourceTimeZone&quot;

I don&#39;t know why I am getting this.

I tried 2 ways

 
     TimeZoneInfo zone = TimeZoneInfo.FindSystemTimeZoneById(id);
     // I also tried DateTime.UtcNow
     DateTime now = DateTime.SpecifyKind(DateTime.Now, DateTimeKind.Local); 
     var utc = TimeZoneInfo.ConvertTimeToUtc(now , zone );

This failed so I tried

     DateTime now = DateTime.SpecifyKind(DateTime.Now, DateTimeKind.Local); 
     var utc = TimeZoneInfo.ConvertTimeBySystemTimeZoneId(now, 
                                               ZoneId, TimeZoneInfo.Utc.Id);

This also failed with the same error. What am I doing wrong?

Edit Would this work?

     DateTime localServerTime = DateTime.SpecifyKind(DateTime.Now, DateTimeKind.Local);
     TimeZoneInfo info = TimeZoneInfo.FindSystemTimeZoneById(id);
    
     var usersTime = TimeZoneInfo.ConvertTime(localServerTime, info);
    
     var utc = TimeZoneInfo.ConvertTimeToUtc(usersTime, userInfo);


Edit 2 @ Jon Skeet

Yes, I was just thinking about that I might not even need to do all this. Time stuff confuses me right now so thats why the post may not be as clear as it should be. I never know what the heck DateTime.Now is getting (I tried to change my Timezone to another timezone and it kept getting my local time).

This is what I wanted to achieve: User comes to the site, adds some alert and it gets saved as utc (prior it was DateTime.Now, then someone suggested to store everything UTC). 

So before a user would come to my site and depending where my hosting server was it could be like on the next day. So if the alert was said to be shown on August 30th (their time) but with the time difference of the server they could come on August 29th and the alert would be shown.

So I wanted to deal with that. So now I am not sure should I just store their local time then use this offset stuff? Or just store UTC time. With just storing UTC time it still might be wrong since the user still probably would be thinking in local time and I am not sure how UTC really works. It still could end up in a difference of time.

Edit3


     var info = TimeZoneInfo.FindSystemTimeZoneById(id)
    
     DateTimeOffset usersTime = TimeZoneInfo.ConvertTime(DataBaseUTCDate,
                                                 TimeZoneInfo.Utc, info);



Having problems with converting my DateTime to UTC

I&#39;m rendering a form. I would like to put a mark next to all the fields that must be filled in. Simple stuff usually... but I&#39;ve no idea how to access that information!

    {% if field.required %}REQUIRED!!{% endif %}

doesn&#39;t bring any love...

Tell if a Django Field is required from template

I'm rendering a form. I would like to put a mark next to all the fields that must be filled in. Simple stuff usually... but I've no idea how to access that information!
<pre><code class="hljs language-makefile">{% if field.required %}REQUIRED!!{% endif %}
</code></pre>
doesn't bring any love...

How do I convert an int (number of seconds) to the formats **mm:ss** or **hh:mm:ss**?

I need to do this with Python code (and if possible in a Django template).


Convert seconds to hh:mm:ss in Python

I&#39;m trying to show thumbnail images in Django admin, but I can only see the path to the images, but not the rendered images. I don&#39;t know what I&#39;m doing wrong.

Server media URL:

    from django.conf import settings
    (r&#39;^public/(?P&lt;path&gt;.*)$&#39;, &#39;django.views.static.serve&#39;,{&#39;document_root&#39;: settings.MEDIA_ROOT}),

Function model:

    def image_img(self):
            if self.image:
                return u&#39;&lt;img src=&quot;%s&quot; /&gt;&#39; % self.image.url_125x125
            else:
                return &#39;(Sin imagen)&#39;
            image_img.short_description = &#39;Thumb&#39;
            image_img.allow_tags = True


admin.py:

    class ImagesAdmin(admin.ModelAdmin):
    
        list_display= (&#39;image_img&#39;,&#39;product&#39;,) 


And the result:

    &lt;img src=&quot;http://127.0.0.1:8000/public/product_images/6a00d8341c630a53ef0120a556b3b4970c.125x125.jpg&quot; /&gt;


Django admin and showing thumbnail images

What is the recommended idiom for checking whether a query returned any results?  
Example:

    orgs = Organisation.objects.filter(name__iexact = &#39;Fjuk inc&#39;)
    # If any results
        # Do this with the results without querying again.
    # Else, do something else...

I suppose there are several different ways of checking this, but I&#39;d like to know how an experienced Django user would do it.
Most examples in the docs just ignore the case where nothing was found...

Checking for empty queryset in Django

please excuse me for my ugly english ;-)

Imagine this very simple model :

    class Photo(models.Model):
        image = models.ImageField(&#39;Label&#39;, upload_to=&#39;path/&#39;)

I would like to create a Photo from an image URL (i.e., not by hand in the django admin site).

I think that I need to do something like this :

    from myapp.models import Photo
    import urllib
    
    img_url = &#39;http://www.site.com/image.jpg&#39;
    img = urllib.urlopen(img_url)
    # Here I need to retrieve the image (as the same way that if I put it in an input from admin site)
    photo = Photo.objects.create(image=image)

I hope that I&#39;ve well explained the problem, if not tell me.

Thank you :)

Edit :

This may work but I don&#39;t know how to convert ``content`` to a django File :

    from urlparse import urlparse
    import urllib2
    from django.core.files import File
    
    photo = Photo()
    img_url = &#39;http://i.ytimg.com/vi/GPpN5YUNDeI/default.jpg&#39;
    name = urlparse(img_url).path.split(&#39;/&#39;)[-1]
    content = urllib2.urlopen(img_url).read()

    # problem: content must be an instance of File
    photo.image.save(name, content, save=True)

Django: add image in an ImageField from image url

I have a template page expecting two forms.  If I just use one form, things are fine as in this typical example:

    if request.method == &#39;POST&#39;:
        form = AuthorForm(request.POST,)
        if form.is_valid():
            form.save()
            # do something.
    else:
        form = AuthorForm()

If I want to work with multiple forms however, how do I let the view know that I&#39;m submitting only one of the forms and not the other (i.e. it&#39;s still request.POST but I only want to process the form for which the submit happened)?

---- 

**This is the solution** based on the answer where *expectedphrase* and *bannedphrase* are the names of the submit buttons for the different forms and *expectedphraseform* and *bannedphraseform* are the forms.

    if request.method == &#39;POST&#39;:
        if &#39;bannedphrase&#39; in request.POST:
            bannedphraseform = BannedPhraseForm(request.POST, prefix=&#39;banned&#39;)
            if bannedphraseform.is_valid():
                bannedphraseform.save()
            expectedphraseform = ExpectedPhraseForm(prefix=&#39;expected&#39;)
        elif &#39;expectedphrase&#39; in request.POST:
            expectedphraseform = ExpectedPhraseForm(request.POST, prefix=&#39;expected&#39;)
            if expectedphraseform.is_valid():
                expectedphraseform.save() 
            bannedphraseform = BannedPhraseForm(prefix=&#39;banned&#39;)
    else:
        bannedphraseform = BannedPhraseForm(prefix=&#39;banned&#39;)
        expectedphraseform = ExpectedPhraseForm(prefix=&#39;expected&#39;)



Proper way to handle multiple forms on one page in Django

I would like to provide the same content inside 2 different base files. 

So I&#39;m trying to do this:

page1.html:

    {% extends &quot;base1.html&quot; %}
    {% include &quot;commondata.html&quot; %}

page2.html:

    {% extends &quot;base2.html&quot; %} 
    {% include &quot;commondata.html&quot; %}


The problem is that I can&#39;t seem to use both extends and include.  Is there some way to do that?  And if not, how can I accomplish the above?

commondata.html overrides a block that is specified in both base1.html and base2.html

The purpose of this is to provide the same page in both pdf and html format, where the formatting is slightly different.  The above question though simplifies what I&#39;m trying to do so if I can get an answer to that it will solve my problem.

django templates: include and extends

How do I get the domain name of my current site from within a Django template? I&#39;ve tried looking in the tag and filters but nothing there.

How can I get the domain name of my site within a Django template?

Pretty simple. I have a Python list that I am passing to a Django template.

I can specifically access the first item in this list using 

    {{ thelist|first }}

However, I also want to access a property of that item... ideally you&#39;d think it would look like this:

    {{ thelist|first.propertyName }}

But alas, it does not.

Is there any template solution to this, or am I just going to find myself passing an extra template variable...



Django Templating: how to access properties of the first item in a list

In my core.html I have a block labeled javascript.  It would be great if I can append more lines to this block without overwriting everything in it.



Can we append to a {% block %} rather than overwrite?

Caught an exception while rendering:  

&gt; Reverse for &#39;products.views.&#39;filter_by_led&#39; with arguments &#39;()&#39; and
&gt; keyword arguments &#39;{}&#39; not found.

I was able to successfully import `products.views.filter_by_led` from the shell and it worked so the path should be correct.

Here is the urls.py:  

    (r&#39;^led-tv/$&#39;, filter_by_led ),

This is where the error is being generated:  

    href=&quot;{% url products.views.filter_by_led %}&quot;&gt;

Which I can&#39;t understand because this works fine from the same file:  

    {% url products.views.lcd_screen_size screen_size=50 %}
    
Here is the function definition:  

    def filter_by_led(request):
    
I don&#39;t understand why Django would think that the function would not be able to find the Reverse for that function.

I deleted all the `*.pyc` files and restarted Apache.

What am I doing wrong?

Content Type	Original Author	Original Content on Stackoverflow
Question	Oli	View Question on Stackoverflow
Solution 1 - Django	Ned Batchelder	View Answer on Stackoverflow
Solution 2 - Django	Joe	View Answer on Stackoverflow

Tell if a Django Field is required from template

Django Problem Overview

Django Solutions

Solution 1 - Django

Solution 2 - Django

Having problems with converting my DateTime to UTC

Is there a Unicode glyph that looks like a "key" icon?

Attributions