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Django: Get an object form the DB, or 'None' if nothing matches
Is there any Django function which will let me get an object form the database, or None if nothing matches?
8 Answers
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Rails 4 - passing variable to partial
...if you want to customize a partial you can for example render the partial _form.html.erb by:
<%= render 'form', button_label: "Create New Event", url: new_event_url %>
<%= render 'form', button_label: "Update Event", url: edit_event_url %>
this way you can access in the partial to the...
Why split the tag when writing it with document.write()?
... in HTML; in XHTML without extra CDATA section wrapping, it's still a well-formedness error. Also you can use \x3C in inline event handler attributes where < would also be invalid in both HTML and XHTML, so it has a wider applicability: if I were choosing one, easily-automated way to escape sensi...
How can I post an array of string to ASP.NET MVC Controller without a form?
...aveList(List<String> values)
{
return Json(new { Result = String.Format("Fist item in list: '{0}'", values[0]) });
}
When I call that javascript function, I get an alert saying "First item in list: 'item1'". Hope this helps!
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What is the concept of erasure in generics in Java?
...;String> and a List<Date> are exactly the same; the extra type information has been erased by the compiler.
Compare this with, say, C#, where the information is retained at execution time, allowing code to contain expressions such as typeof(T) which is the equivalent to T.class - except t...
How to get input type using jquery?
... get type:
var allCheckboxes=$('[type=checkbox]');
EDIT2:
Note that the form of:
$('input:radio');
is perferred over
$(':radio');
which both equate to:
$('input[type=radio]');
but the "input" is desired so it only gets the inputs and does not use the universal '*" when the form of $(':r...
Android Fragments and animation
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Thomas if you want to back, you should implemented this form: .setCustomAnimations(R.anim.pop_enter, R.anim.pop_exit, R.anim.enter, R.anim.exit)
– Alex Zaraos
Jun 15 '15 at 15:41
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jQuery see if any or no checkboxes are selected
...
You can use something like this
if ($("#formID input:checkbox:checked").length > 0)
{
// any one is checked
}
else
{
// none is checked
}
share
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improv...
How to access parameters in a RESTful POST method
... class since the data is passed using simple argument passing.
HTML <FORM>
The parameters would be annotated using @FormParam:
@POST
@Path("/create")
public void create(@FormParam("param1") String param1,
@FormParam("param2") String param2) {
...
}
The browser wil...
Maven in Eclipse: step by step installation [closed]
...in and use it" I am sure you are looking for a Eclipse plugin that will perform Maven functions within the IDE. If so, M2E is a good choice. You will find a lot of help within the Eclipse installation once you install M2E.
That said -- considering that you are starting off using Maven -- it would...