方法未找到HasDatabaseGeneratedOption [英] Method not found HasDatabaseGeneratedOption

问题描述

我已阅读所有与此相关的帖子，我已经尝试过所有但不是结果。

I have read all post related to this and i've tried them all but not results.

我使用流畅的api将我的模型映射到数据库。但是当我查询我得到这个错误：

Im using fluent api to map my models to the database. But when im query i get this Error:

Method not found:

 'System.Data.Entity.ModelConfiguration.Configuration.DecimalPropertyConfiguration

System.Data.Entity.ModelConfiguration.Configuration.DecimalPropertyConfiguration.HasDatabaseGeneratedOption(System.Nullable`1<System.ComponentModel.DataAnnotations.Schema.DatabaseGeneratedOption>)'.

我的模型如下所示：

ToTable("table_name");
    HasKey(x => x.CounterId)//this property IS NOT NULLABLE
        .Property(x => x.CounterId).HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity)
        .HasColumnName("dbCounter_Id")
        .HasPrecision(10, 0)
        .IsRequired();

    Property(x => x.HouseId)
        .HasColumnName("dbHouseId");

    Property(x => x.ApplicationId)
        .HasColumnName("dbApplication_id");

由于某些原因 .HasDatabaseGeneratedOption（DatabaseGeneratedOption.Identity）给我这个错误，所以当我退出它：

For some reason .HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity) is giving me this error so when i quit it:

HasKey(x => x.CounterId)
    .Property(x => x.PageId)
    .HasColumnName("dbCounter_Id")
    .HasPrecision(10, 0)
    .IsRequired();

我没有错误但像地狱一样幸运，当我尝试添加一个记录到该表时，我得到插入身份异常。我不能添加或退出 HasDatabaseGeneratedOption（DatabaseGeneratedOption.Identity）方法。

I get not error but as im lucky as hell, when im trying to add a record to that table i get insert identity exception. I cant neither added nor quit it the HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity) method.

重要提示：键code> CounterId 不是类型INTEGER，而是DECIMAL（10,0）。这可能是问题吗？我不能更改列的数据类型，因为生产中有很多应用程序会以最坏的方式影响。

Important: The key CounterId is not type INTEGER, is DECIMAL(10,0) instead. Could that be the problem here? I cannot change the datatype of the column since there are a lot of app in production that will be affect in the worst way.

希望我能得到任何帮助。 p>

Hope i can get any help.

推荐答案

你应该这样做

ToTable("table_name");
    HasKey(x => x.CounterId); // you should split HasKey from Property
    Property(x => x.CounterId)
        .HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity)
        .HasColumnName("dbCounter_Id")
        .HasPrecision(10, 0)
        .IsRequired();

    Property(x => x.HouseId)
        .HasColumnName("dbHouseId");

    Property(x => x.ApplicationId)
        .HasColumnName("dbApplication_id");

这篇关于方法未找到HasDatabaseGeneratedOption的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！