Justin James


Web Developer, Tester, and Professional Speaker

EF Core - Split Model Configuration Into Files By Table

With EF Core, you configure your entities (e.g. tables) using the OnModelCreating in your database context. It is easy to just put all of the configurations into that OnModelCreating method which for just a few entities works great. However, as the number of entities grows, OnModelCreating easily becomes unwieldy with thousands of lines of configuration code.

In this post, I am going to show you how you can move the configuration for each of your entities to it’s own file and just have to put a single line of code in the OnModelCreating for each entity. This will greatly simplify the management and maintenance of the entity configuration code.

Read More


EF Core - Use Enum as Column Value

When dealing with databases, there are times when you want a column to only allow certain values. When using EF Core, the easiest way to accomplish this goal is to use an enum as the type for the property.

In this post, we will add a new column to an entity that is of an enum type, set the default value, and create the migration script.

Read More


EF Core - Audit Fields - Track Created By and Last Updated By Values Automatically

In several applications I work on, in addition to the soft deletes that we implemented in the previous post, we also have a requirement to implement audit tracking. Audit tracking is the tracking of who created the record, the date the record was created, who was the last person to update the record, and the last updated date of the record.

In this post, we will implement audit tracking so that the audit fields are automatically added onto our entities and EF Core automatically sets the values when save our entity.

Read More


EF Core - Implement Soft Delete

In several applications I work on, we have a requirement that we are not allowed to delete any data out of the database physically. Instead, when we need to delete a record, we set an IsDeleted column to true and exclude the row from our queries.

In this post, we will be implementing soft deletes on an example project.

Read More


ASP.NET Core - AutoMapper - Handle When Property Names Are Not Same Between Objects

So far in our AutoMapper series all of the property names between the input and output objects have been the same. There are times though that the property names will not match and you will need to tell AutoMapper how to map the properties else the configuration will not be valid.

In this post, we will take a look at the AutoMapper configuration need to map between property names that do not match.

Read More