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How to set a Django model field's default value to a function call / callable (e.g., a date relative
...e class.
PRE Django 1.7
Django lets you pass a callable as the default, and it will invoke it each time, just as you want:
from datetime import datetime, timedelta
class MyModel(models.Model):
# default to 1 day from now
my_date = models.DateTimeField(default=lambda: datetime.now() + timedel...
How to write DataFrame to postgres table?
There is DataFrame.to_sql method, but it works only for mysql, sqlite and oracle databases. I cant pass to this method postgres connection or sqlalchemy engine.
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Example of multipart/form-data
...0690/895245
To see exactly what is happening, use nc -l or an ECHO server and an user agent like a browser or cURL.
Save the form to an .html file:
<form action="http://localhost:8000" method="post" enctype="multipart/form-data">
<p><input type="text" name="text" value="text defa...
Linux, Why can't I write even though I have group permissions?
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Did you logout and log back in after making the group changes? See:
Super User answer involving touch permissions failure
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How to position a DIV in a specific coordinates?
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Script its left and top properties as the number of pixels from the left edge and top edge respectively. It must have position: absolute;
var d = document.getElementById('yourDivId');
d.style.position = "absolute";
d.style.left = x_pos+'px...
Java resource as file
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ClassLoader.getResourceAsStream and Class.getResourceAsStream are definitely the way to go for loading the resource data. However, I don't believe there's any way of "listing" the contents of an element of the classpath.
In some cases this may be simply im...
How to print HTML content on click of a button, but not the page? [duplicate]
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this may destroy your animations and events that was added by js after load. Use with caution.
– Lukas Liesis
Dec 14 '15 at 16:45
7
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Java multiline string
...n in String.format.
Another option is to put the resource in a text file, and just read the contents of that file. This would be preferable for very large strings to avoid unnecessarily bloating your class files.
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Adding hours to JavaScript Date object?
...dding an hour causing it to roll over to the next day, would this catch it and increment everything properly (day month year)?
– cdoern
May 14 at 16:40
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center aligning a fixed position div
...CCS3 transform property. Although it's not supported in some old browsers. And we don't even need to set a fixed or relative width.
.centered {
position: fixed;
left: 50%;
transform: translate(-50%, 0);
}
Working jsfiddle comparison here.
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