Database First EntityType 'table' has no key defined. Define the key for this EntityType

Question

I Create the model starting from a Oracle Database. In the table that I picked there isn't a primary key so the entity framework complains about that and it is not able to generate the classes correctly. Do you know a way to generate the model in the correct way without adding the primary key to the database?

Answer 1

One way of adding a primary key to a table after you have created your model is to open this file [1]: https://i.stack.imgur.com/6vJhP.png . Once inside you will see all the relevant tables on the model. [1]: https://i.stack.imgur.com/bSIsK.png . Right click on the column you wish to make the primary key, you will see the wording "Entity Key", make sure this is ticked/selected as in the image. Save the model, and rebuild project. This should be done on all tables complaining of primary keys. Hope it helps.