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Paperclip::Errors::MissingRequiredValidatorError with Rails 4
I'm getting this error when I try to upload using paperclip with my rails blogging app.
Not sure what it is referring to when it says "MissingRequiredValidatorError"
I thought that by updating post_params and giving it :image it would be fine, as both create and update use post_params
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Android: set view style programmatically
...uper(context, null, R.style.LightStyle);
}
}
The one argument constructor is the one used when you instantiate views programmatically.
So chain this constructor to the super that takes a style parameter.
RelativeLayout someLayout = new MyRelativeLayout(new ContextThemeWrapper(this,R.style.Radi...
Can you attach a UIGestureRecognizer to multiple views?
... you can only use a gesture recognizer once, I'm not sure if this is a bug or it just needs some more documentation.
12 Ans...
How to output a comma delimited list in jinja python template?
... to be:
{% if not loop.last %}
,
{% endif %}
Note that you can also shorten the code by using If Expression:
{{ ", " if not loop.last}
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Warning on “diff.renamelimit variable” when doing git push
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The documentation doesn't mention 0 as a special value for diff.renamelimit.
So you should set that limit to the value recommended.
Or you can try deactivating the rename detection altogether. (git config diff.renames 0)
You will find a similar example in this blog post "Conflue...
What is the difference between HashSet and List?
...ained to contain only unique entries, the internal structure is optimised for searching (compared with a list) - it is considerably faster
Adding to a HashSet returns a boolean - false if addition fails due to already existing in Set
Can perform mathematical set operations against a Set: Union/Inter...
Difference between os.getenv and os.environ.get
...but the body also includes os.environ vs. os.environ.get() so this answer correct in at least some ways - incomplete, but correct.
– FKEinternet
Jul 1 '19 at 18:12
3
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C++: Rounding up to the nearest multiple of a number
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This works for positive numbers, not sure about negative. It only uses integer math.
int roundUp(int numToRound, int multiple)
{
if (multiple == 0)
return numToRound;
int remainder = numToRound % multiple;
if ...
.net localhost website consistently making get arterySignalR/poll?transport=longPolling&connectionTo
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This is working as intended. Artery aka BrowserLink is a real-time connection from Visual Studio to all browsers running your code. It essentially allows Visual Studio to interact with every browser.
For instance if you have IE, Op...
Stack vs heap allocation of structs in Go, and how they relate to garbage collection
...d programming where automatic variables live on the stack and allocated memory lives on the heap and and Python-style stack-based-programming where the only thing that lives on the stack are references/pointers to objects on the heap.
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