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Editorial Team
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Asked: 2026-06-13T09:58:01+00:00

I’m reverse engineering a database with Entity Framework Power Tools beta 2, now, the

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I’m reverse engineering a database with Entity Framework Power Tools beta 2, now, the POCOs created do not have the [Key] in the definition, but the mapping with Fluent has the this.HasKey(t => t.EntityId);

I have the POCOs in a separate project and and MVC 4 application which has a reference to it. When I try to add a controller it says then entities do not have the Key defined.
Exact message is:

System.Data.Entity.EdmEntityType: EntityType: ‘Computer’ has no key defined. Define the key for this EntityType.

Why the reverse engineering process do not add the [Key] attribute if it is mandatory? Or it is not mandatory and I’m missing something?

Thanks in advance. Guillermo.

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1 Answer

  1. Editorial Team

    The problem was with connectionString to the database. Now I’ve the connectionStrings.config file set and it works.

    NOTE: Worked to use reverse engineering but on runtime it fails again complaining about the [Key]
    \tSystem.Data.Entity.Edm.EdmEntityType: : EntityType ‘Computer’ has no key defined. Define the key for this EntityType.

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