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Adding a column to an existing table in a Rails migration
...ontaining line:
add_column :users, email, string
Then do a rake db:migrate and it'll run the new migration, creating the new column.
If you have not yet run the original migration you can just edit it, like you're trying to do. Your migration code is almost perfect: you just need to remove the add_...
How to re-sign the ipa file?
...like to sign the IPA with an ad-hoc provisioning profile for beta testing, and then re-sign the exact IPA with an app submission provisioning profile for the app store.
...
Handle ModelState Validation in ASP.NET Web API
...ded for this are System.Net.Http, System.Net System.Web.Http.Controllers, and System.Web.Http.Filters.
– Christopher Stevenson
Jan 15 '13 at 22:38
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What is the C# Using block and why should I use it? [duplicate]
...eDisposableType()) {
OperateOnType(u);
}
The second is easier to read and maintain.
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How to keep a .NET console app running?
...hen you are forcing the code to recheck variables. It wastes CPU resources and slows down your program.
I would definitely say the first one.
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ASP.NET MVC: Custom Validation by DataAnnotation
...(validationContext.DisplayName));
}
return null;
}
}
and then you might have a view model and decorate one of its properties with it:
public class MyViewModel
{
[CombinedMinLength(20, "Bar", "Baz", ErrorMessage = "The combined minimum length of the Foo, Bar and Baz propert...
How to use Session attributes in Spring-mvc
...)request.getSession().setAttribute("cart",value);
return "testJsp";
}
and you can get it from controller like this :
ShoppingCart cart = (ShoppingCart)session.getAttribute("cart");
Make your controller session scoped
@Controller
@Scope("session")
Scope the Objects ,for example you have user...
Find and copy files
...*.xml' -exec cp "{}" /home/shantanu/tosend \;
Please, note: the find command use {} as placeholder for matched file.
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How do I log errors and warnings into a file?
How do I turn on all error and warnings and log them to a file, but to set up all of that within the script (not changing anything in php.ini)?
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Best programming aids for a quadriplegic programmer
... the heading of, "There, but for the grace of God, go you or I." This is brand new territory for me so I'm asking for some serious help here.
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