Error 1 Error 3027 No Mapping Specified For The Following
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here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring entity type is not mapped developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question no mapping specified for properties in set x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; association is not mapped it only takes a minute: Sign up Why am I getting this error: No mapping specified for the following EntitySet/AssociationSet - Entity1? up vote 60 down vote favorite 8 I'm using Entity Framework 4 with the Model First approach.
Error 11008 Association Is Not Mapped
I started the project, designed the entities and generated the database. Everything worked fine. Then I needed to go back and add another entity to my model. However, as I drag an entity to the EDMX I get this error: Alright! I just need to map Entity1 to a table.. But hey! I'm using Model First approach, I expect it to create the table for me when I generate the DDL. How do I work around this error? .net entity-framework property is not mapped entity-framework-4 share|improve this question edited Feb 10 '13 at 4:41 asked Apr 14 '11 at 17:47 andrerpena 16.2k1983135 So can generate database script from your model? –Ladislav Mrnka Apr 14 '11 at 18:42 add a comment| 11 Answers 11 active oldest votes up vote 98 down vote accepted This is because of the way EF4 works with model-first. When you first create a model-first model, it's in a state that the SSDL does not exist. You can drag entities, associate them and so forth and yet, if you take a look at the SSDL on the EDMX file, you will see that none of the entities have an associated storage table in the SSDL. That changes when you click the Generate Database From Model context menu item. The confusing part is that this action does more than simply generating a DDL script. In fact, it changes the EDMX file to include SSDL information. From this point on, the EDMX file will enter a state in which every entity in the designer/CSDL must map to an entity in the SSDL. If one does not map, it will trigger a compile time error: No mapping specified for the following EntitySet/AssociationSet - (EntityName) Another interesting fact is that it's not the kind of error that will prevent compilation. It will, indeed, generate the output class library. Shouldn't it be a warning or something? To prevent this
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An Entity With Key (pk) Will Not Round-trip When: Entity Is Type
Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a http://stackoverflow.com/questions/5667355/why-am-i-getting-this-error-no-mapping-specified-for-the-following-entityset-as minute: Sign up How do I correctly set an association between two objects in the Entity Framework 4 Entitydesigner? up vote 54 down vote favorite 6 For a new project I'm trying to create my business classes first and create the real database tables later. Therefore I'm using the Entity Framework 4 Designer. A created a new "ADO.Net Entity Data model" file, http://stackoverflow.com/questions/3700637/how-do-i-correctly-set-an-association-between-two-objects-in-the-entity-framewor with the extension .edmx. I created two Entities: I want to add a 1 to nc relation between Product -> Group. If I'd created the MSSQL database first, I would have added a column IDGroup to the Table Product and referenced Product.IDGroup to Group.IDGroup. As far as I can see, I can't add such association in the designer if I add a new Property called IDGroup to the Product Entity This is how I add the mapping: Which results in: Now the part what this question is about: If I add two tables from an existing MSSQL database to the edmx file, I'll get the compile error: Error 3027: No mapping specified for the following EntitySet/AssociationSet - GroupSet, ProductSet What does that error mean and what must I do to fix this? If I delete those two tables, I'll receive a warning instead: Error 2062: No mapping specified for instances of the EntitySet and AssociationSet in the EntityContainer myContainer. Something tells me, I'm doing this all wrong and this is just basic stuff. How can I do it right? c# asp.net entity-framework-4 shar
ASP.NET Community Standup Forums Help Home/ASP.NET Forums/General ASP.NET/Getting Started/Error 3027: No mapping specified for the following EntitySet/Associat... Error 3027: No http://forums.asp.net/t/1826028.aspx?Error+3027+No+mapping+specified+for+the+following+EntitySet+AssociationSet mapping specified for the following EntitySet/AssociationSet [Answered]RSS 2 replies Last post Apr 13, 2013 10:45 AM by DilshodN ‹ Previous Thread|Next Thread › Print Share Twitter Facebook Email Shortcuts Active Threads Unanswered Threads Unresolved Threads Support Options Advanced Search Reply balamsc Member 57 Points 114 Posts Error 3027: No mapping specified for the following EntitySet/AssociationSet Jul is not 20, 2012 06:34 AM|balamsc|LINK HI, " Error 3027: No mapping specified for the following EntitySet/AssociationSet" while mapping two tables in .edmx file Thanks in Advance, Balaji.J Please mark this as answer if solved the question, Best Regards, Balaji.J Reply DarrellNorto... All-Star 66183 Points 10249 Posts ModeratorMVP Re: Error 3027: No mapping specified for the is not mapped following EntitySet/AssociationSet Jul 20, 2012 10:50 AM|DarrellNorton|LINK Either you don't have the tables in the database that are specified in the error message, or there is no mapping to the tables in the EDMX. Add the tables to the database, or remove and then re-add the tables to the EDMX to fix the mapping issue. Darrell Norton, MVP Darrell Norton's Blog Please click "Mark as Answer" if this helped you. Reply DilshodN None 0 Points 1 Post Re: Error 3027: No mapping specified for the following EntitySet/AssociationSet Apr 13, 2013 10:45 AM|DilshodN|LINK Hi Darrell, I am using EF to SQLite database. I tried to generate model from database and works fine, but when I add Assocciation between tables I am getting error: Error 3027: No mapping specified for the following EntitySet/Asso.... As you said I removed all the tables and readded to EDMX model. No sucess. I am using .NET 4.5. What should I do to fix it? Thanks, ‹ Previous Thread|Next Thread › T