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Can a foreign key be NULL and/or duplicate?
...at record. A separate table can be "ProposalAssignedTo" or some such, with appropriate constraints. A query writer can then join to that table, and supply their own logic for whatever we want to do when a proposal doesn't have a salesperson. NULL doesn't just mean "we don't know" - it can be used fo...
how to make a whole row in a table clickable as a link?
...use jquery.
Author's note II:
Preserved for posterity but surely the wrong approach in 2020. (Was non idiomatic even back in 2017)
Original Answer
You are using Bootstrap which means you are using jQuery :^), so one way to do it is:
<tbody>
<tr class='clickable-row' data-href='url://'&g...
How do I uniquely identify computers visiting my web site?
...rowser fingerprinting poses in practice,
and what countermeasures may be appropriate to prevent it. There is a
tradeoff between protection against fingerprintability and certain kinds of
debuggability, which in current browsers is weighted heavily against privacy. Paradoxically, anti-fingerpri...
A non-blocking read on a subprocess.PIPE in Python
...
I've created some friendly wrappers of this in the package shelljob pypi.python.org/pypi/shelljob
– edA-qa mort-ora-y
Oct 31 '13 at 10:07
...
How to get active user's UserDetails
...amework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"
id="applicationConversionService">
<property name="customArgumentResolver">
<bean class="CurrentUserWebArgumentResolver"/>
</property>
</bean>
@See: Learn to customize Spring MVC @Cont...
Separation of business logic and data access in django
...confusing and, after a certain time, I cease to understand what is really happening.
10 Answers
...
How do you overcome the HTML form nesting limitation?
.../post/dispatch/clone" />
</div>
http://www.whatwg.org/specs/web-apps/current-work/#attributes-for-form-submission
The advantage of these new features is that they do all this declaratively without JavaScript. The disadvantage is that they are not supported on older browsers, so you'd hav...
Entity Framework is Too Slow. What are my options? [closed]
...
@Doug Most applications have view models for view-only scenarios, right? Might as well do as much of the mapping as you pull out the data.
– Casey
Aug 26 '15 at 15:58
...
HTML minification? [closed]
... answer - you should definitely minify HTML. It is trivial today and gives approximately 5% speedup. For longer answer read the whole answer
Back in old days people were manually minifying css/js (by running it through some specific tool to minify it). It was kind of hard to automate the process an...
How to send an email with Python?
...(reproduced from the Python documentation). Notice that if you follow this approach, the "simple" task is indeed simple, and the more complex tasks (like attaching binary objects or sending plain/HTML multipart messages) are accomplished very rapidly.
# Import smtplib for the actual sending functio...