Preventing Storage Model Overwrites By Update Wizard
Jul 17, 2010
In my Entity Framework v4 project, I have a table with two columns that are computed by the database (via triggers, etc.). In order to get EF to properly insert records into the table, I have to manually mark the columns as "Computed" in the EF Storage Model (the StoreGeneratedPattern attribute), which is not supported by the designer -- so I have to make the edits by hand to the XML in the .EDMX file. The problem is that whenever my database schema changes, and I need to update the storage model in my project, the "Update Model Wizard" overwrites the whole Storage Model section of the .EDMX, eliminating my manual changes. This means that I have to keep a special list of such changes and manually re-apply them everytime I do an update!
Is there any way to prevent the Storage Model overwrites? Is there a way to flag the columns in the database, so that EF will automatically mark them as computed? As a last resort, is the some REALLY EASY XML tool/technique that can automatically apply the changes for me after every refresh? I've been told by an insider that one solution might be to check out the "Designer Power Pack" (link below), which allows you to customize generation of the storage model. I've only skimmed the info so far, but it looks to me like there may be a day or two learning curve to figure that out. Does anyone have any experience with the Designer Power Pack, or any other ideas? [URL]
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visual studio: 2010
Database: oracle 11g r2
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stored procedure for updating
PROCEDURE "update_config_magic"
(times_to_repeat_in IN NUMBER,
account_num_in IN NUMBER,
spell_num_in IN NUMBER
)
IS
PRAGMA AUTONOMOUS_TRANSACTION;
BEGIN
UPDATE user_train_config_magic
SET timestorepeat = times_to_repeat_in
WHERE user_train_config_magic.account_num = account_num_in AND
user_train_config_magic.SPELL_NUM = spell_num_in;
COMMIT;
END "update_config_magic";
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[Code]....
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[Code]....
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[Code]....
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[Code]....
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UpdateModel(consultant, "Consultant");
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{
Program formProgram = vm.Programs[i];
Program modelProgram = consultant.Programs.SingleOrDefault(x => x.Id == formProgram.Id);
if (modelProgram == null)
_repository.AddProgram(formProgram);
else
modelProgram = formProgram;
UpdateModel(modelProgram); //Doesn't work. The modelProgram object does get updated with the correct property values, but it isn't saved to the repository...
}
_repository.Save();
Although this follows the example on the site above, and the modelProgram does get updated with the changed properties, these values are not saved to the database on _repository.Save() on the Consultant object, even though the modelProgram object is a reference to a Program object on the Consultant... What am I doing wrong?
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[Code]....
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