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How do I clone a Django model instance object and save it to the database?
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Just change the primary key of your object and run save().
obj = Foo.objects.get(pk=<some_existing_pk>)
obj.pk = None
obj.save()
If you want auto-generated key, set the new key to None.
More on UPDATE/INSERT here.
Official docs on copying model instances: https://docs.djangoproje...
The most accurate way to check JS object's type?
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@jamietre because "foo" instanceof String breaks
– Raynos
Oct 25 '11 at 18:58
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How to check whether a given string is valid JSON in Java
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I've tried a json string like "{'hello':'foo'} 'invalid'" (added 'invalid' outside the {}), and JSONObject is not throwing ParseException. I am using org.json.JSONObject. Is this expected?
– Soichi Hayashi
Aug 21 '14 at 22:40
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Android global variable
... like so:
// set
((MyApplication) this.getApplication()).setSomeVariable("foo");
// get
String s = ((MyApplication) this.getApplication()).getSomeVariable();
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How to check if a column exists in a SQL Server table?
... IF OBJECT_ID('TableName','U') IS NULL to check object existence or DB_ID('foo') to check database existence.
– Martin Smith
Nov 30 '11 at 22:31
60
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Determine installed PowerShell version
...ing different version (invoke-command -computername myRemotePC -Credential foo {$host}), it looks like $host will just show the lowest version they agreed upon for serializing. While $PSVersionTable will show the true version. Hope it would help someone..
– vulcan raven
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How to create a tag with Javascript?
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})();
}
You can add external files via
document.createStyleSheet('foo.css');
and dynamically create rules via
var sheet = document.createStyleSheet();
sheet.addRule('h1', 'background: red;');
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Create empty queryset by default in django form fields
...2':value2})
form.fields['field3'].queryset = YourModel.objects.filter('foo'=bar)
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How can I disable a button in a jQuery dialog from a function?
... You need to work around this method to disable the buttons. Use jQuery-foo to get the resultant dom elements off the page.
– Stefan Kendall
Jul 23 '10 at 14:12
36
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What is a “translation unit” in C++
.... The file-name isn't important at all. The content is. If the content of "foo.h" is "int main() { }" you can compile it.
– Johannes Schaub - litb
Jul 9 '09 at 21:11
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