Entity Framework Code-first (10.1): Entitytypeconfiguration

Entitytypeconfiguration Class in Code-first:

Before we start to configure using the Fluent API, let's see an important class of fluent API.

Entitytypeconfiguration is a important class in Fluent API. Entitytypeconfiguration provides important methods to configure entities and its properties to override various Code-f IRST conventions. It can be obtained by calling the Entity<tentity> () method of Dbmodelbuilder class as shown below.

Entitytypeconfiguration has the following important methods:

Method Name	Return Type	Description
Haskey<tkey>	Entitytypeconfiguration	Configures the primary key property (s) for this entity type.
Hasmany<ttargetentity>	Manynavigationpropertyconfiguration	Configures a many-to-many relationship from the this entity type.
Hasoptional<ttargetentity>	Optionalnavigationpropertyconfiguration	Configures an optional relationship from the this entity type. Instances of the entity type can be saved to the database without this relationship being specified. The foreign key in the database would be nullable.
Hasrequired<ttargetentity>	Requirednavigationpropertyconfiguration	Configures a required relationship from the this entity type. Instances of the entity type are not being able to being saved to the database unless this relationship is specified. The foreign key in the database would be non-nullable.
Ignore<tproperty>	Void	Excludes a property from the model so, it would not be mapped to the database.
Map	Entitytypeconfiguration	Allows advanced configuration related to how this entity type is mapped to the database schema.
Property<t>	Structuraltypeconfiguration	Configures a struct property, which is defined on the this type.
ToTable	Void	Configures the table name, the This entity type was mapped to.

Visit MSDN For more information on entitytypeconfiguration class.

Let's start to configure entities using Fluent API in the next section.

Entity Framework Code-first (10.1): Entitytypeconfiguration