![]() On the app side all db interactions through EF are not working anymore. Some tables of one schema have dependencies on tables that reside on a different schema. context. if you have a Company object that has a collection of Employees. In some cases, however, you can avoid adding every object - specifically, if you have an entity graph and you add the parent node. I recently organized my tables into 4 different schemas. With the Entity Framework (EF) I want to load an object from my database, modify it and save it back. Generally you cant do that - you have to do it in a loop. This post assumes you have a basic understanding of EF Core data contexts and how they map to a database. The database used to have one schema, dbo and everything was working fine. ![]() For clarity, here are the two tables defined in C#. The DbContext defines tables like Productions and Ratings, but otherwise is not very important to this post. This collection of joins is for a set of tables that logically go together. We’ll be working with a previous data model around Entertainment. At its simplest, a context is a logical collection of joins. Read more about SQL Server views at the Microsoft Documentation site. Each database engine will implement views differently, so consult the documentation of the underlying provider. With Entity Framework Core you can share a transaction across multiple contexts for relational databases only. Additionally, TransactionScope is not the recommended approach for handling transactions with Entity Framework 6.x. Its part of the System.Transactions namespace. Taking advantage of views can help simplify queries and may help improve database performance. TransactionScope is not part of Entity Framework. Views allow us to encapsulate an otherwise complex query into a logical entity in our database. Let’s get started! What’s A SQL Viewįor folks who aren’t aware, a view is a virtual table based on the result-set of a predefined query. In this post, we’ll walk through adding an empty database migration, defining a complex SQLite view, and then modifying our EF Core DbContext to give us access to our view. Entity Entity Framework is an open-source and object-relational mapping (ORM) framework and used. ![]() The only requirement is that the elements in each source share some value that can be compared for equality. With Entity Framework Core 5 (EF Core), it’s never been more straightforward to take advantage of all the tools our database has to offer. In C there is nothing keeping the two properties in sync. The join clause is useful for associating elements from different source sequences that have no direct relationship in the object model. I named the entry project and solution MultipleDbContexts. Views are a great way to achieve both goals. First step is to create a MVC Web API Core project that will later use our DB contexts. This question has been asked 500 different times in 50 different ways. As our application’s mature, we see opportunities to optimize our codebase along with query performance. Entity Framework Multiple Object Contexts. Working with databases is a fun yet challenging task. ![]()
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