Here is what happens when I try to update model from database with VS express 2013 for the web, EF6.1.1 and .NET framework 4.5.
In this case I just added a field to a table in the table definition and updated the database.
After that I right click update model from database in the EDMX model view and I get this error message:
An exception of type ‘System.runtime.interopServices.COMException’
occurred while attempting to update from the database. The exception
message is: ‘A file or folder with the name ‘Model.Context.tt’ already
exists. Please give a unique name to the item you are adding or delete
the existing item first.
I noticed that I get the same error message when I try to generate the database from the model.
I tried the following methods:
How do you update an edmx file with database changes?
http://blog.jongallant.com/2012/08/entity-framework-manual-update.html#.VMYYRv7A7mH
but none of them worked.
I also found that https://entityframework.codeplex.com/workitem/1104 and it seems that it has been resolved with “commit 7e8331d1d22d (EFTools repo)”.
Anyone can help me on how to solve my problem or on what is “commit 7e8331d1d22d (EFTools repo)” ?
Thanks
Boid’
It's an old question but I just run into the same issue. Finally found a solution in this bug report. Check if you have any *.tt files that are not added to solution and remove them. That fixed the problem for me.
I created a new project and added an empty data model. I added a few entities and properties and then generated the database according to this tutorial. So far, so good. I then went back and added additional entitities.
Now, I am no longer able to Generate Database From Model... because I receive an Error 11007: Entity Type 'xxxx' is not mapped for all of the new entities I added. According to msdn, I can follow the instructions here to resolve my mapping issue between conceptual and storage models. However, it appears these instructions assume the entities are already present in my storage model (which they are not). When I try to manually map them, the only two tables I have to choose from are the original two tables I created.
I appreciate any help you can offer.
This was a phantom error of sorts. I had another error with a default value I was trying to set for a datetime that appeared at the bottom of my error list. I resolved this error and everything is now working as it should.
I have a problem when I got the lasted .edmx.
I get a message that says
Error 11007: Entity type 'pl_Micro' s not mapped.
Looking at the designer view, I do see that this table does indeed exist.
How can I overcome this meesage?
From MSDN:
Error 11007: Entity Type Is Not Mapped
This error occurs when an entity type in the conceptual model is not mapped to the data source. To resolve this error, map the entity type to the data source. Look at the MSDN link
How to: Map Entities to Database Tables
I get this error when I move a database table to a different schema or delete a database table. In this case Entity Framework doesn't seem to update the edmx file correctly when you Update Model from Database....
The way I resolved this was to do a text search for the name of the offending entity. I then removed all references to this in the xml view of the edmx file, deleted the corresponding cs file that defines the entity, and any other references in the project.
This error was passed to me by the SQL Server Authentication server did not have the necessary permissions and could not see the entities.
Confirm that your sql user has the necessary permissions in the database.
This happens also when you import tables via diagram in edmx and then you point in app.config to different instance of database (switching from dev db to test db for example)
I got this error because I had copy pasted an entity and modified it. Restarting visual studio resolved this.
Correct, close visual study, enter the * .edmx file with a notepad ++, sublime text, notepad, etc., search the table, search the column and modify the column size (MaxLength), in all matches, in My case was 2, but they can be more. Start visual studio and the change is already accepted.
I got this error because I had to update the table column type.
Refresh table in SQL server and re-add table in the entity framework for resolving this.
I am getting the following error when using the RequiredIf attribute in the entity while initializing the database using EF5 code first.
System.Data.DataException: An exception occurred while initializing the database.
See the InnerException for details. ---> System.Data.Entity.Validation.DbEntityValidationException:
Validation failed for one or more entities. See 'EntityValidationErrors' property for more details.
If I comment the [RequiredIf] attribute code first build the database successfully. Any idea?
Update:
I step through the debugger and found that it's adding a validation error. How do I switch this off while initializing the database using code first.
The problem was occurring during the seeding. The requiredIf validation says if the ApplicationStatus is recommended i.e. 2 then the DecisionDate is mandatory. So I added the DecisionDate property to the seed function in my context and it worked. Thank you everybody to looking at the issue anyway.
Lesson learnt is if you put validation in you domain objects then seed data accordingly.
I'm currently working with Silverlight and the RIA services Entity Framework. Today I have encountered an error message saying "invalid changeset: originalentity cannot be specified for an insert operation". I Googled with no result, so my question is: has anyone ever encountered the same problem?
Here are the steps to reproduce the error:
create a new entity and add it to its entity set
submit changes
remove the entity
submit changes
add again the entity to the entity set
submit changes -> the error shows up here
Since the status of the entity is "new", my hypothesis is that the framework is trying to perform an insert operation, but the data that is passed to the server side still has some information on the entity as it was inserted before (the "originalentity", which is probably meant to be used in update operations), so the insert operation fails. What do you think?