February 2008 - Posts
But I only just realized that extension methods are cool for avoiding NullReferenceExceptions . We all know that if you have something like this: LicensePlate licensePlate = null ; Car car = licensePlate.Car; It will throw a NullReferenceException . However
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So if you don't already know Julie is a hugely respected member of the EF community. She does mentoring and heaps of training and presentations about the EF, so she knows what she is talking about. Anyway I just finished listening to her interview with
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I'm assuming you've read part 1 and part 2 , if not why not? Just kidding, they will make this post a little easier to understand though. I'm going to show you how to create a read-only association with a Payload. Okay so imagine you have this model:
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I invite you to take a look at this forum post from 'Benys' It illustrates the power of the Entity Framework's mapping capabilities + partial classes. The short answer to a lot of "Does the EF support ... ?" type questions is often no. Often however the
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Okay so the 'cat is out of the bag' you CAN do associations with Payloads... Sort of . Now for an explanation of what I meant by 'Sort of'. Let's dream a little and imagine how it might work in an ideal world. Imagine something like this: Product p =
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Those of you who know what I am talking about will probably also know that we have been saying publicly that the Entity Framework doesn't support them. Now for those who don't know what an association with a payload is, imagine something like: Order <-
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Okay so we've got to the interesting bit at last. We've hooked up our extension method, we've got a query for filtering the records we are updating, we've got a map from object Properties to database Columns. So now comes the interesting bit... We now
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Okay, okay, okay... yes I know this is the slowest moving series in the history of blogging (sorry Roger J). Now, when a blog post starts like that, you would probably expect the next sentence to begin with "But" or "However", not this time though, I
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