How to fix System.Data.Edm.EdmEntityType has no key

Question

.net asp.net-mvc entity-framework linq

Does anybody know how to fix this error:

System.Data.Edm.EdmEntityType: : EntityType 'BlogTags' has no key defined. Define the key for this EntityType.

Using MVC 3 with Entity Framework.

Just put [Key] on top of your property (which is presenting primary key). Something like this,

[Key]
public int BlogTypeId { get; set; }

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CodingGorilla · Accepted Answer · 3/11/2011 8:14:36 PM

The error tells you all you need to know: "Define the key for this EntityType".

In EF all entities must have primary keys of some type.

CodingGorilla