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SQLAlchemy: cascade delete
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The problem is that sqlalchemy considers Child as the parent, because that is where you defined your relationship (it doesn't care that you called it "Child" of course).
If you define the relationship on the Parent class instead, it will work:
children = rel...
Linux c++ error: undefined reference to 'dlopen'
...knocteknocte
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2
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libxml install error using pip
...python-dev
– daonb
Sep 26 '12 at 21:51
5
In Red Hat-based systems, (Red Hat, Suse, CentOS), repla...
DDD - the rule that Entities can't access Repositories directly
...ize it all has to be ditched. It also means when people join the team, add new features, they know where to go and how to structure the program.
But wait! Repository also refers to the persistence layer, as in the Repository Pattern. In a better world an Eric Evans' Repository and the Repository Pa...
AWS Difference between a snapshot and AMI
... of that instance's EBS volume and registers it as an AMI. You can launch new instances specifying that AMI as the starting point. You could also create new volumes of the EBS snapshot if you just wanted to look at the files on it without running a new instance.
– Eric Hammon...
Intellij IDEA crashed, and now throws an error
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When to use Cast() and Oftype() in Linq
...type you will get InvalidCastException
EDIT
for example:
object[] objs = new object[] { "12345", 12 };
objs.Cast<string>().ToArray(); //throws InvalidCastException
objs.OfType<string>().ToArray(); //return { "12345" }
...
ASP.NET MVC: Unit testing controllers that use UrlHelper
...ar case (using Url.RouteUrl in controller)
Hope this helps:
var routes = new RouteCollection();
MvcApplication.RegisterRoutes(routes);
var request = new Mock<HttpRequestBase>(MockBehavior.Strict);
request.SetupGet(x => x.ApplicationPath).Returns("/");
request.SetupGet(x => x.Url).Retu...
How to get a value of an element by name instead of ID
...uld I get the value of an element via the attribute name instead of the ID . eg if I use by id it would be $('#id').val();
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Why would you use Expression rather than Func?
...erable<T> Get(Func<T, bool> conditionLambda){
using(var db = new DbContext()){
return db.Set<T>.Where(conditionLambda);
}
}
This worked great until I started getting OutofMemoryExceptions on larger datasets. Setting breakpoints inside the lambda made me realize that it wa...