从edmx删除映射

Question

In the edmx file I deleted some of the properties because I don't want to add them to the POCO object, but each time I get that kind of exception:

Error   1   Error 3023: Problem in mapping fragments starting at line 255:Column COMPANY.contact_phone_number in table COMPANY must be mapped: It has no default value and is not nullable.

Why do I need map those columns if they don't have default values and are not nullable??

Answer 1

I get it.
I must map non-nullable fields without default value because when inserting there must be a value to the field!

Answer 2

我不确定我是否完全理解，您有一个POCO类，然后同一类在EDMX中也有定义，并且您要在POCO中指定某些属性，还是在EDMX中指定某些属性？