blocks|key|714661|text|我发现我得到了同样的错误，因为我在创建两个实体之间的关联后忘记了创建引用约束。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|714662|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I found I was getting the same error because I had forgot to create referential constraint after creating an association between two entities.

blocks|key|930718|text|我遇到了同样的错误，但我没有使用model-first。结果是，不知何故，我的EDMX文件包含了一个对表的引用，尽管它没有显示在设计器中。有趣的是，当我在Visual+Studio+(2013)中对表名进行文本搜索时，没有找到该表。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|930719|为了解决这个问题，我使用了一个外部编辑器(Notepad%2B%2B)在EDMX文件中查找对有问题的表的引用，然后(小心地)删除了对该表的所有引用。我很抱歉地说，我不知道EDMX文件最初是如何进入这种状态的。|930720|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I ran into the same error, but I was not using model-first. It turned out that somehow my EDMX file contained a reference to a table even though it did not show up in the designer. Interestingly, when I did a text search for the table name in Visual Studio (2013) the table was not found. 

To solve the issue, I used an external editor (Notepad++) to find the reference to the offending table in the EDMX file, and then (carefully) removed all references to the table. I am sorry to say that I do not know how the EDMX file got into this state in the first place.

blocks|key|930738|text|在我的例子中，另一个开发人员从底层数据库中删除了一些表。当我意识到这一点，并从实体中删除这些表时，问题就解决了。并不像听起来那么明显。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|930739|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

In my case, another developer had removed some of the tables from the underlying database. When I realised this, and removed these tables from the entity, the problem was solved. Wasn't as obvious as it sounds.

blocks|key|714816|text|对我来说，更快的方法是删除这些表，然后重新添加它们。它会自动映射它们。:)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|714817|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

A quicker way for me was to delete the tables and re-add them. It Auto-mapped them. :)

blocks|key|931167|text|对于那些使用Database+First方法的用户，在插入新实体后，您需要做的就是右键单击.edmx文件并选择Generate+Database+From+Model...，再次执行Generate+Database+From+Model操作|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|931168|entityMap^0|6|E|19|5|1J|V|2J|S|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]|$9|O|A|P|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|G|$]]

For those who are using <code>Database First</code> approach all you have to do after inserting a new entity is to <code>Generate Database From Model</code> again by right click on your <code>.edmx</code> file and select <code>Generate Database From Model...</code>

blocks|key|931238|text|从数据库更新模型对我不起作用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|931239|我必须删除冲突的实体，然后执行Update+Model+from+Database，最后重建解决方案。在那之后，一切都很好。|931240|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Update Model from Database doesn't works for me. 

I had to remove the conflicted entity, then execute Update Model from Database, lastly rebuild the solution. After that, everything works fine.

blocks|key|930773|text|当我从数据库中删除一个表时，出现了这个错误。通过右键单击EDMX关系图，转到属性，从属性窗口的列表中选择表，并从关系图中删除它(使用delete键)，解决了这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|930774|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Had this error when I had deleted a table from the database. Solved it by right clicking on EDMX diagram, going to Properties, selecting the table from the list in the Properties window, and deleting it (using delete key) from the diagram.

blocks|key|714913|text|当我试图为一个存储过程生成一个自定义结果，并假设它必须是一个实体时，我遇到了这个错误。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|714914|解决方案是，我只是在模型浏览器中创建了一个复杂类型，并将其分配给“编辑函数导入”。|714915|我将在这里添加它，因为看起来这个问题是当你收到这个错误时谷歌会把你带到哪里。|714916|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

I had the error when I was trying to make a custom result for a stored procedure and assumed it had to be an entity.

The solution was that I just made a complex type in the Model browser and assigned that as a result to the "Edit function imports".

I will add it here since it looks like this question is where google takes you when you get this error.

blocks|key|715085|text|我已经正确地设置了所有内容(基数和依赖属性)，但是我不知道为什么我总是收到错误。最终发现，EF在dependent表(table_tablecolumn)中生成了一个列，并且它与表没有任何关系，因此没有指定映射。我不得不删除EDMX文件中的列，并重新构建解决方案，解决了这个问题。我正在使用DB方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|715086|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I had set everything correctly (cardinalities and dependent properties) but could not figure out why I keep receiving error. Finally figured out that, EF generated a column in dependent table on its own (table_tablecolumn) and it does not have any relation to the table, so no mapping was specified. I had to delete the column in EDMX file and rebuild the solution which fixed the issue. I am using DB approach.

blocks|key|931299|text|把这个分享给其他人。在我的例子中，我们正在开发一个共享的MVC解决方案，并使用一个通用的模块来处理我们用于下拉菜单的表。当我通过添加一个新的表来更新实体模型时，我得到了这个错误。事实证明，当我更新EDMX时，它可能更新了我对数据库的访问权限，这导致无法访问给我提供no+mapping+specified的特定表。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|931300|只需重新添加并授予我的用户访问权限，就解决了问题。|931301|entityMap^0|3O|K|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|M|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|N|8|@]|D|@]|E|$]]]|I|$]]

Sharing this for other people. In my case, we were working on a shared MVC solution, and using a common module for tables that we use for dropdowns. I got the error when I updated the Entity model by adding a new table. It turns out that when I updated the the EDMX, it probably updated my rights access on the database, which resulted to not having access to that certain table giving me <code>no mapping specified</code>.

Just re-adding and giving access to my user solved the problem.

blocks|key|715338|text|我想这是因为在重命名和重新添加一些表之前没有显式地从edmx中删除它们。相反，我只是重命名了表，然后从数据库更新模型，认为它会看到它们消失，并从模型中删除它们。然后，我从数据库中执行了另一个更新模型，并添加了重命名的表。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|715339|该站点正在使用新的表，但我遇到了错误。最后，我注意到原始表仍然在模型中。我从模型中删除了它们(在edmx屏幕中单击它们，删除键)，然后错误就消失了。|715340|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I think I got this from not explicitly deleting some tables from the edmx before renaming and re-adding them. Instead, I just renamed the tables and then did an Update Model from Database, thinking it would see them gone, and delete them from model. I then did another Update Model from Database and added the renamed tables.

The site was working with the new tables, but I had the error. Eventually, I noticed the original tables were still in the model. I deleted them from the model (click them in edmx screen, delete key), and then the error went away.

blocks|key|715398|text|如果您使用的不是model-first；双击'edmx‘file+->select+all并删除所有实体模型并保存，右击'update+model+from+database+->+required+tables+->finish+->+save。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|715399|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

If you are not using model-first; Double click 'edmx' file -&gt;select all and delete all entity models -&gt; save -&gt; right click 'update model from database -&gt;select required tables -&gt;finish and save.

I'm using Entity Framework 4 with the Model First approach.

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:

<img src="https://i.stack.imgur.com/9vis8.png" alt="enter image description here">

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?

Why am I getting this error: No mapping specified for the following EntitySet/AssociationSet - Entity1?

Visual Studio

数据库

我正在使用Entity Framework4和模型优先方法。我启动了这个项目，设计了实体并生成了数据库。一切都很好。然后我需要返回并将另一个实体添加到我的模型中。但是，当我将一个实体拖到EDMX时，我得到了这个错误：​​好了！我只需要将Entity1映射到一个表。但是嘿！我使用的是Model First方法，我希望它能在我生成DDL时为我创建表。如何解决此错误？

问为什么我得到这个错误:没有为下面的实体集/关联集- Entity1指定映射？
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问为什么我得到这个错误:没有为下面的实体集/关联集- Entity1指定映射？
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