• Register
0 votes

Problem :

I am having the table with the name EducationTypes and also an Entity named as EducationType, I just tried to rename the one of the entity properties but now I am always facing following error :

Either the parameter @objname is ambiguous or the claimed @objtype (COLUMN) is wrong. How can I fix the above mentioned error?

The generated SQL Script is as below:

EXECUTE sp_rename @objname = N'dbo.EducationTypes.nvarchar', @newname = N'EducationTypeTitle', @objtype = N'COLUMN'

6 5 3
7,540 points

1 Answer

0 votes

Solution :

I think this is happening because of the name Conflict of Class (Model) names with the other reserved or the generated ones, but when auto creates the tables and Considering that EF Code First creates the intervene tables to relate the two or more of the tables using name of the tables for derived intervene table, so when you use the class name that employs a name like the intervene tables, we will get as such this ambiguous error.

e.g. If you have the Question class which has the navigation property with the name Answer  then the internal model metadata will contain the reference called QUESTION_ANSWER

To resolve this, just try to change the class names which are used for generating tables and ensure that they are unique.

9 7 4
38,600 points

Related questions

0 votes
1 answer 68 views
Problem : I have one entity type called product which is generated by the entity framework. I have tried to write below query public IMyQueryable<Product> GetProducts(int myCategoryID) {     return from prod in db.Products     where prod.CategoryID== myCategoryID     select ... one select new Product { Name = p.Name}; it miraculously works correctly. How can I perform the custom select section?
asked Jan 27 jwilliam 3.9k points
0 votes
2 answers 207 views
Problem : Currently I am migrating from the Identity 1.0.0 to Identity 2.0.1. But the migrations code generated is nothing about the new IdentityUser. And It does not even add the new columns. So I tried to make the new project and also I ... current context At below line IdentityResult result = await UserManager.CreateAsync(user, model.Password); Any clue about the solution on my above problem?
asked Dec 25, 2019 alecxe 7.5k points
0 votes
1 answer 62 views
Problem : My Query is giving the strange error as follows there is already an open datareader associated with this command which must be closed first.
asked Nov 15, 2019 peterlaw 6.9k points
0 votes
1 answer 73 views
Problem : I am getting bellow error related to datetime the conversion of a datetime2 data type to a datetime data type resulted in an out-of-range value.
asked Nov 7, 2019 peterlaw 6.9k points
0 votes
1 answer 10 views
How can i apply any entity framework approach like code first and database first in the ASP.NET MVC application.
asked Sep 16 Daniel Anderson 4k points