postgres entityframework foreignkey 

 1     public class Model
 2     {
 3         [Key, Column("id"), DatabaseGenerated(DatabaseGeneratedOption.Identity)]
 4         public long Id { get; set; }
 5         [Column("create_time")]
 6         public DateTime CreTime { get; set; } = DateTime.Now;
 7         [Column("create_uid")]
 8         public long? CreUid { get; set; }
 9         [Column("update_time")]
10         public DateTime? UpdTime { get; set; }
11         [Column("update_uid")]
12         public long? UpdUid { get; set; }
13         [Column("remark")]
14         public string Remark { get; set; }
15         [Column("is_del")]
16         public bool IsDel { get; set; } = false;
17     }
18 
19     [Table("a_user_type")]
20     public class UserCls
21     {
22         [Key, Column("id"), DatabaseGenerated(DatabaseGeneratedOption.None)]
23         public long Id { get; set; }
24         [Column("des")]
25         public string Des { get; set; }
26     }
27 
28     [Table("b_user")]
29     public class User : Model
30     {
31         [Column("account"), Index(IsUnique = false)]
32         public string Account { get; set; }
33         [Column("passwd")]
34         public string Passwd { get; set; }
35         [Column("label")]
36         public string Label { get; set; }
37         [Column("cls_id"), ForeignKey("Cls")]
38         public long? ClsId { get; set; }
39         public virtual UserCls Cls { get; set; }
40     }

以上数据库字段全部取小写，是因为postgres非常严格，驼峰式写法的sql要加双引号，非常麻烦。

mssqlserver 可以完全不用管，mysql只需注意表的名字小写即可，postgres连字段名都要特别注意。

 1     public class MesDbContext: DbContext
 2     {
 3         public MesDbContext():base("name=mes")
 4         {
 5             Database.SetInitializer(new MigrateDatabaseToLatestVersion<MesDbContext, MigrateConfig>());
 6         }
 7 
 8         public DbSet<User> Users { get; set; }
 9         public DbSet<UserCls> UserCls { get; set; } 
10     }
11 
12     public class MigrateConfig : DbMigrationsConfiguration<MesDbContext>
13     {
14         public MigrateConfig()
15         {
16             AutomaticMigrationsEnabled = true;
17             AutomaticMigrationDataLossAllowed = true;
18         }
19     }
1   <entityFramework>
2     <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
3     <providers>
4       <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
5       <provider invariantName="Npgsql" type="Npgsql.NpgsqlServices, EntityFramework6.Npgsql" />
6     </providers>
7   </entityFramework>
8   
1   <system.data>
2     <DbProviderFactories>
3       <!--  注意这里，安装程序包时，这里的配置并不会自动添加  -->
4       <remove invariant="Npgsql" />
5       <add name="Npgsql" invariant="Npgsql" description=".Net Framework Data Provider for Postgresql" type="Npgsql.NpgsqlFactory, Npgsql" />
6     </DbProviderFactories>
7   </system.data>
8   
1 <?xml version="1.0" encoding="utf-8"?>
2 <packages>
3   <package id="EntityFramework" version="6.2.0" targetFramework="net45" />
4   <package id="EntityFramework6.Npgsql" version="3.1.1" targetFramework="net45" />
5   <package id="Npgsql" version="3.2.5" targetFramework="net45" />
6   <package id="System.Threading.Tasks.Extensions" version="4.4.0" targetFramework="net45" />
7 </packages>

 

posted on 2018-02-10 09:47  jonney_wang  阅读(301)  评论(0)  编辑  收藏  举报

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