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In a Django form, how do I make a field readonly (or disabled) so that it cannot be edited?
...ng get_readonly_fields.
Usually you should declare something like this in app/admin.py:
class ItemAdmin(admin.ModelAdmin):
...
readonly_fields = ('url',)
I've adapted in this way:
# In the admin.py file
class ItemAdmin(admin.ModelAdmin):
...
def get_readonly_fields(self, request...
Cannot overwrite model once compiled Mongoose
...y one mongoDB server instance and more Databases, if you define in another app the a database already taken then you got such error. Simply as that
– Carmine Tambascia
Dec 16 '19 at 17:28
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How to detect Ctrl+V, Ctrl+C using JavaScript?
... I needed to enable users to select an "element" (calendar entry) in a web app I'm writing, hit ctrl + c to "copy" it, then ctrl+v to "paste" it, all without actually interacting with the allmighty blessed clipboard. ctrl+c I remember what they're clicked on, ctrl+v I duplicate it, everyone wins.
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Best XML parser for Java [closed]
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I wouldn't recommended this is you've got a lot of "thinking" in your app, but using XSLT could be better (and potentially faster with XSLT-to-bytecode compilation) than Java manipulation.
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What is the difference between sigaction and signal?
I was about to add an extra signal handler to an app we have here and I noticed that the author had used sigaction() to set up the other signal handlers. I was going to use signal() . To follow convention I should use sigaction() but if I was writing from scratch, which should I choose?
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Why is Magento so slow? [closed]
...en means querying multiple rows
There's a lot of things behind the scenes (application configuration, system config, layout config, etc.) that involve building up giant XML trees in memory and then "querying" those same trees for information. This takes both memory (storing the trees) and CPU (pars...
How can I make a weak protocol reference in 'pure' Swift (without @objc)
...ss a protocol is declared as @objc , which I don't want in a pure Swift app.
6 Answers
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What are named pipes?
...tain the credentials of the thing on the other end etc).
Unix named pipes appear as a special file in the filesystem and can be accessed with normal file IO commands including the shell. Windows ones don't, and need to be opened with a special system call (after which they behave mostly like a norm...
View markdown files offline [closed]
...g many .md files. And instant preview, without having to toggle to another app is always a plus.
– dval
Oct 13 '15 at 14:12
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How do I abort/cancel TPL Tasks?
...red Feb 6 '13 at 21:19
Florian RapplFlorian Rappl
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