Can an entity also be an attribute?
May an attribute be an entity as well? This sounds really confusing, but I’d say that’s not possible. However, you could have an attribute referencing a specific entity.
How many key attributes can an entity have?
In some instances, an entity will have more than one attribute that can serve as a primary key. Any key or minimum set of keys that could be a primary key is called a candidate key. Once candidate keys are identified, choose one, and only one, primary key for each entity.
How does the [ foreignkey ( name ) attribute work?
The [ForeignKey] attribute overrides the default convention for a foreign key It allows us to specify the foreign key property in the dependent entity whose name does not match with the primary key property of the principal entity. The [ForeignKey (name)] attribute can be applied in three ways:
When to use a foreign key in EF?
As per the default convention, EF makes a property as foreign key property when its name matches with the primary key property of a related entity. name: Name of the associated navigation property or the name of the associated foreign key (s). Consider the following example of a one-to-many relationship among entities.
Is there foreign key field in employee entity?
We do not have any Property representing the Foreign Key field in Employee entity. The Entity Framework conventions will create the Foreign Key field in the database for us. It will use the name NavigationpropertyName_PrimaryKeyOftheNavigationPropertyType.
How are foreign keys used in independent associations?
In both foreign key and independent associations, concurrency checks are based on the entity keys and other entity properties that are defined in the model. When using the EF Designer to create a model, set the ConcurrencyMode attribute to fixed to specify that the property should be checked for concurrency.