Update model from database in entity framework is not working

Question

If any changes have made on the datatype or constraints(eg not null - null) of a particular column in table and performing Update model from database (Refresh a particular table) in entity framework is not updating the entity model.

Each time I have to delete and re-create the table manually.

Is this only solution? or any other best way to do this?

Answer 1

从model删除适用的表，而不是选择Update model from database ，EF通常只检查新字段，而不是更改现有字段。

Answer 2

Check if the new updated/created table in the database contains an identity key column (like an ID column). Entity Framework is especially sensitive when working with tables that don't represent uniqueness in their records.