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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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What is NODE_ENV and how to use it in Express?
...ly run in a production environment - it's much safer if your app throws an error if this important value is not set (or if preferred, defaults to production logic as above).
Be aware that if you haven't explicitly set NODE_ENV for your environment, it will be undefined if you access it from process....
“The underlying connection was closed: An unexpected error occurred on a send.” With SSL Certificate
... I get this exception "THE UNDERLYING CONNECTION WAS CLOSED: AN UNEXPECTED ERROR OCCURRED ON A SEND" in my logs and it is breaking our OEM integration with our email marketing system at random times varying from [1hour - 4 hours]
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How do I check if a string is valid JSON in Python?
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You can try to do json.loads(), which will throw a ValueError if the string you pass can't be decoded as JSON.
In general, the "Pythonic" philosophy for this kind of situation is called EAFP, for Easier to Ask for Forgiveness than Permission.
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Swift to Objective-C header not created in Xcode 6
... it had been deleted (e.g. by cleaning the build folder) then you will see error messages everywhere that the file is imported, even for .m files, adding to the confusion.
– rene
Dec 29 '15 at 20:29
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add column to mysql table if it does not exist
...uld be to just try the ALTER TABLE ADD COLUMN command. It should throw an error if the column already exists.
ERROR 1060 (42S21): Duplicate column name 'newcolumnname'
Catch the error and disregard it in your upgrade script.
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Macro vs Function in C
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Macros are error-prone because they rely on textual substitution and do not perform type-checking. For example, this macro:
#define square(a) a * a
works fine when used with an integer:
square(5) --> 5 * 5 --> 25
but does ve...
Store output of subprocess.Popen call in a string
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if you want to get error stream add stderr: p = subprocess.Popen(["ntpq", "-p"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
– Timofey
May 27 '14 at 12:29
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How can I send mail from an iPhone application
... didFinishWithResult:(MFMailComposeResult)result
error:(NSError*)error;
{
if (result == MFMailComposeResultSent) {
NSLog(@"It's away!");
}
[self dismissModalViewControllerAnimated:YES];
}
Remember to check if the device is configured for sending email:
if ([MFM...
Why can't Python find shared objects that are in directories in sys.path?
...ocal/lib $LD_LIBRARY_PATH /usr/local/lib But I still get the same error: $ python -c "import pycurl" Traceback (most recent call last): File "<string>", line 1, in <module> ImportError: libcurl.so.4: cannot open shared object file: No such file or directory
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