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org.hibernate.MappingException: Could not determine type for: java.util.List, at table: College, for
...lass hierarchy, you can't mix the strategies, at least not in JPA 1.0. JPA 2.0 makes it possible to mix strategies though, but you'd need extra annotations (and thus more complexity). So the recommendation is to pick one strategy and to stick to it in your application. See 2.2.2.2. Access type.
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Setting DEBUG = False causes 500 Error
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I encountered the same issue just recently in Django 2.0. I was able to figure out the problem by setting DEBUG_PROPAGATE_EXCEPTIONS = True. See here: https://docs.djangoproject.com/en/2.0/ref/settings/#debug-propagate-exceptions
In my case, the error was ValueError: Missing s...
C# Lambda expressions: Why should I use them?
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Lambda's cleaned up C# 2.0's anonymous delegate syntax...for example
Strings.Find(s => s == "hello");
Was done in C# 2.0 like this:
Strings.Find(delegate(String s) { return s == "hello"; });
Functionally, they do the exact same thing, its ...
Best way to combine two or more byte arrays in C#
...lternatively, if you just need a single IEnumerable, consider using the C# 2.0 yield operator:
IEnumerable<byte> Combine(byte[] a1, byte[] a2, byte[] a3)
{
foreach (byte b in a1)
yield return b;
foreach (byte b in a2)
yield return b;
foreach (byte b in a3)
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Tri-state Check box in HTML?
..., Firefox 15, Opera 12 and back to IE7. Regarding mobile browsers, Android 2.0 browser and Safari mobile on iOS 3.1 don't have support for it.
Previous answer
Another alternative would be to play with the checkbox transparency
for the "some selected" state (as Gmail does used to
do in prev...
Lost my schema.rb! Can it be regenerated?
... schema.rb still contains empty schema after rake db:schema:dump on rails 2.0
– Will Hardwick-Smith
Jan 7 '16 at 3:30
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BeanFactory vs ApplicationContext
...n important note from the linked Spring documentation: "Versions of Spring 2.0 and above make heavy use of the BeanPostProcessor extension point (to effect proxying and suchlike), and if you are using just a plain BeanFactory then a fair amount of support such as transactions and AOP will not take e...
How to add url parameters to Django template url tag?
..."{% url 'service_data' d.id %}">
...XYZ
</a>
Used in django 2.0
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rgdal package installation
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On a Fedora 21 system using R-3.2.0, the following worked:
yum install gdal.x86_64 gdal-devel.x86_64 gdal-libs.x86_64
yum install proj.x86_64 proj-devel.x86_64
yum install proj-epsg.x86_64 proj-nad.x86_64
Obviously this was the result of repeated tries t...
In which order should floats be added to get the most precise result?
...0000;
double big = 1.0;
double small = 1e-9;
double expected = 2.0;
double sum = big;
for (long i = 0; i < billion; ++i)
sum += small;
std::cout << std::scientific << std::setprecision(1) << big << " + " << billion << " * " <...