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By right-click on the template file and choose “Run Custom Tool” the entity classes will be regenerated to reflect the latest changes to the model. As the context by default expects the entity classes to be in the same namespace, add a using statement for their new namespace to the Model. Finally, you need to add a reference from the DAL project to the domain model project in order for it to compile.
With both the model first and code first approaches the presumption is that you don’t have an existing database when you start developing the application and a database schema is created based on the model.
On the server side, things will get easier if you decide to not support graphs.
In this case you could expose an Add method and an Update method for each entity type and these methods would only operate on a standalone instance rather than a graph of entities. It is all about setting the state of the passed in entity object.
Again, in an enterprise level application where separation of concerns is of great importance you certainly want to have your domain logic and your data access logic in separate projects.
In other words you want to move the generated model (Model.tt) to another project. For the template in the new domain model project to be able to find the model you then need to modify it to point to the correct EDMX path.
There is a one-to-many relationship between the CREATE TABLE [dbo].[Department] ( [Department Id] INT IDENTITY (1, 1) NOT NULL, [Name] VARCHAR (50) NULL, PRIMARY KEY CLUSTERED ([Department Id] ASC) ); CREATE TABLE [dbo].[Employee] ( [Employee Id] INT IDENTITY (1, 1) NOT NULL, [Department Id] INT NOT NULL, [First Name] VARCHAR (20) NOT NULL, [Last Name] VARCHAR (20) NOT NULL, [Email] VARCHAR (50) NULL, PRIMARY KEY CLUSTERED ([Employee Id] ASC), CONSTRAINT [FK_Employee_Department] FOREIGN KEY ([Department Id]) REFERENCES [dbo].[Department] ([Department Id]) ); A large enterprise application will typically have one or more databases to store data and on top of this a data access layer (DAL) to access the database(s).