Databases
StackOverflow2013
Postsdbo
PO
 

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    <p>I have the exact same problem, but I wouldn't be able to formulate it that well.</p> <p>In my case, there would be tons of ViewModels, because different users would see different forms based on a set of roles. I think the 1:1 relation between ViewModel and View is very vague. What if I write an uber-View which pretty much simply uses <code>EditorForModel</code> and not much more? Now I have one, albeit highly degenerate, view for everything, so I also have only one ViewModel?</p> <p>My idea was to write an <code>EditorForModel</code> that works not only based on reflection (that is, information known at compile time), but also on (domain specific) runtime rules, for example governed by the current user's role, the current time, etc. Consequently, one also needs to write a custom <code>ModelBinder</code> with validation as well as a custom mapping from Model to ViewModel. Still, this keeps me from writing stupid and thus error-prone code. </p> <p>Since my Model (or DomainModel) contains a lot of logic, I don't want it to be modified via ModelBinding at all. Moreover, since it is impossible to know what fields will be present at compile time, providing an appropriate ViewModel is impossible. However, the 'full', i.e. maximal ViewModel is known. Mapping from the ViewModel to the Model again involves custom code, but as long as the rules can be formalized, that should work out.</p> <p>Sorry my text is very confusing, but I am very confused right now myself, plus I gotta run. Like C.T., couldn't comment either.</p>
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    1. POBest practices concerning view model and model updates with a subset of the fields
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    1. USmnemosyn
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    1. COuse ValueInjecter http://valueinjecter.codeplex.com/ and map the FormCollection (or Request) to your entities (it's done automatically), there is a sample asp.net mvc application in the download that demonstrates this
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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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