EDMGen2 – Now with Reverse Engineering options

re: EDMGen2 – Now with Reverse Engineering options

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re: EDMGen2 – Now with Reverse Engineering options

walter verhoeven — Thu, 22 Oct 2009 07:38:32 GMT

In my case the code was generating inheritance in reverse.

intresting problem

re: EDMGen2 – Now with Reverse Engineering options

dsoltesz — Wed, 29 Apr 2009 16:31:31 GMT

I would have to agree with pop that this tool needs to support integer (fk) hierachies.

Interesting reads

Meta-Me — Wed, 29 Apr 2009 06:37:54 GMT

Over the weekend in between run throughs that I did prepping for a webcast, I did some catch-up blog

re: EDMGen2 – Now with Reverse Engineering options

Pop Catalin — Mon, 06 Apr 2009 22:47:40 GMT

Instead of automatic identification of TPH patterns, I think I'd prefer a functionality in the designer that creates a hierarchy from values of a user selected column or if the column is a FK the related table values.

We never use char columns as discriminants for entity hierarchies, we always use integer columns that are foreign keys to other tables that serve as enumerations. (the reasons are FK integrity checks, easier localization, reduced row size (which is very important that it doesn't grow very large as our tables are pretty big, and performance is always an issue)).

Also we have far more complex rules for hierarchies, involving multiple columns. Ex:

Product(Source_ID, Destination_ID, ... ) - Source_ID and Destination_ID reference ProductionLines.

- When Source_ID == Destination_ID the entity stored in the row is a TransformedProduct (which also has more types).

- When Source_ID != Destination_ID the entity stored is a LoadPackage.

(*this model is not supported by EF as a hierarchy)

Sometime the discriminants are on more columns. For example we have recipe tables, and each line, can be a recipe header (which can also be a processing header a processing group header, a faze header, a chemical product group header etc) , a processing line (witch can also be of many types), a chemical product (of more types...) etc, and the discriminants are on different columns witch are of different types (int, bit) determined by null value of some columns or by column value.

More modeling capabilities are always welcome, but I sincerely doubt that automatic determination of hierarchy as it is, is a real world useful tool or that it brings more value than, let's say an easy way to create a hierarchy or subhierarchy using the designer, using a selected discriminant.

Sincerely,

Pop Catalin

Entity Framework Model Generation with TPH Detection

Community Blogs — Sun, 05 Apr 2009 13:09:55 GMT

URL : http://blogs.msdn.com/adonet/archive/2009/04/04... One of my favorite patterns in the Entity Framework

EDMGen2 ??? Now with Reverse Engineering options | ASP.NET MVC

EDMGen2 ??? Now with Reverse Engineering options | ASP.NET MVC — Sun, 05 Apr 2009 09:45:26 GMT

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