Join Richard Goforth for an in-depth discussion in this video Navigation properties, part of Accessing Existing Databases with Entity Framework Core.
- [Instructor] Navigation properties are one of…the big reasons for using entity framework.…Rather than relying on manually joining related tables,…you can use sets on the model to represent the related data.…An entity framework will automatically join the data…when related data is requested.…For existing databases, we may want to add or remove…navigation properties that we're scaffolding.…When the model was created,…the foreign keys were automatically converted…to entity framework navigation properties.…We can modify what was generated…to remove unnecessary navigation properties.…
Let's start by looking at the product model…in our models folder.…In the product model,…we can see that we have a collection of owner items.…Since the product doesn't have to reference its owner items…but rather the owner items usually reference a product,…we'll remove that side of a relationship.…After removing it from the model,…we'll remove it from the context.…Open up the context and scroll down to the product.…We can see the compiler is showing us an error…
- Setting up your project
- Connecting to a legacy database
- Scaffolding an initial model and context
- Improving the model
- Updating properties and indexes
- Adding concurrency tokens and timestamps
- Creating complex relationships
- Working with non-Microsoft databases such as SQLite and PostgreSQL
Skill Level Intermediate
SQL Server 2014 Essential Trainingwith Martin Guidry3h 51m Intermediate
Microsoft SQL Server 2014: Backup and Recoverywith Martin Guidry1h 22m Intermediate
1. Get Started with EF Core: On Your Legacy Database
2. Improve the Model
3. Model Complex Relationships
4. Work with Non-Microsoft Databases
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