Entity Framework How do you refresh the model when the db changes

Question

If you build the edmx file from the database and then the db changes  how do you get the model to pick up the change   Do you delete the whole model and regenerate or can you detect changes   I see a post mentioning a  Update Your Model  rt  mouse command on the edmx file  but I dont see it   Updating your edmx to reflect changes made in your db   net linq-to-entities   I m just starting out

User · Answer

Update CodeFirst Model is not possible automatically. I don't recommend either. Because one of the benefits of code first is you can work with POCO classes. If you changed this POCO classes you don't want some auto generated code to destroy your work.

But you can create some template solution add your updated/added entity to the new model. then collect and move your new cs file to your working project. this way you will not have a conflict if it is a new entity you can simply adding related cs file to the existing project. if it is an update just add a new property from the file. If you just adding some couple of columns to one or two of your tables you can manually add them to your POCO class you don't need any extra works and that is the beauty of Working with Code-First and POCO classes.

User · Answer

Here    Delete the Tables from the EDMX designer Rebuild Project SLN  this will clear the model class  Update Model from Database readd all the tables you want  Rebuild project SLN  this will recreate your model class including the new columns

User · Answer

I just had to update an  edmx model   The model Run Custom Tool option was not refreshing the fields for me  but once I had the graphical designer open  I was able to manually rename the fields

User · Answer

You need to be careful though  You need to setup the EDMX file exactly as it was before deleting it  if you choose the delete regenerate route   otherwise  you ll have a naming mismatch between your code and the EF generated model  especialy for pluralization and singularization   Hope this will prevent you some headaches

User · Answer

This might help you guys  I ve applied this to my Projects   Here s the 3 easy steps    Go to your Solution Explorer  Look for  edmx file  Usually found on root level  Open that  edmx file  a Model Diagram window appears  Right click anywhere  on that window and select  Update Model from Database   An Update Wizard window appears  Click Finish to update your model  Save that  edmx file    That s it  It will sync refresh your Model base on the changes on your database   For detailed instructions  Please visit the link below   EF Database First with ASP NET MVC  Changing the Database and updating its model

User · Answer

I have found the designer  update from database  can only handle small changes   If you have deleted tables  changed foreign keys or  gasp  changed the signature of a stored procedure with a function mapping  you will eventually get to such a messed up state you will have to either delete all the entities and  add from database  or simply delete the edmx resource and start over

User · Answer

Double click on the  edmx file then right click anywhere on the screen and choose  Update Modle From DB   In the new window go to the  Refresh  tab and choose the changed table view and click Finish

User · Answer

Are you looking at the designer or code view   You can force the designer to open by right clicking on your EDMX file and selecting Open With - gt  ADO NET Entity Data Model Designer  Right click on the designer surface of the EDMX designer and click Update Model From Database     All entities are refreshed by default  new entities are only added if you select them     EDIT  If it is not refreshing well    Select all the tables and view-s in the EDMX designer  Delete them  Then  update model from database

User · Answer

I ve been working on a project  not too large  that incorporates Entity Framework  about a dozen tables  and about 15 stored procs and functions  After weeks of development  attempting to refresh my tables and stored procs has yielded mixed results as far as successfully updating the model  Sometimes the changes are effective  most times they are not  Simple column changes  changing order  adding  removing  or renaming  sometimes works  most times does not  Visual Studio seems to have more problems with refreshing than just adding new  It also exhibits more problems with stored proc changes not being reflected  especially when columns are added or deleted or renamed  I have not detected any consistent behavior so i can t say  This type of change will always be updated and this type of change will not    End result  if you want 100  effective solution  delete the EDMX file from the project   Add new  item to project  ADO NET Entity Data Model   and make sure you use the same name for the Model Name  This works every time

[entity-framework] Entity Framework : How do you refresh the model when the db changes?

Examples related to entity-framework