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Updated AOP (markdown)

2881099
2025-03-13 09:11:47 +08:00
parent d06b6977d7
commit 9487a63c4d
1 changed files with 5 additions and 33 deletions
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38
AOP.md

@@ -120,6 +120,8 @@ fsql1.Aop.ConfigEntityProperty += (s, e) =>
### 字典表应用 ### 字典表应用
利用 全局过滤器 + Aop 实现如下效果：
```csharp ```csharp
[MapTable(typeof(SysParam), nameof(SysParam.Value), "001")] [MapTable(typeof(SysParam), nameof(SysParam.Value), "001")]
class Param001 class Param001
@@ -130,7 +132,7 @@ class Param001
public int Age { get; set; } public int Age { get; set; }
} }
fsql.Select<Param001>().ToList(); fsql.Select<Param001>().ToList();
//SELECT * FROM SysParam WHERE Value = '001' //SELECT Value2, Value3 FROM SysParam WHERE Value = '001'
public class SysParam public class SysParam
{ {
@@ -140,40 +142,10 @@ public class SysParam
public string Value3 { get; set; } public string Value3 { get; set; }
//... //...
} }
//实现关键
fsql.Aop.ConfigEntity += (s, e) =>
{
var attr = e.EntityType.GetCustomAttribute<MapTableAttribute>();
if (attr != null)
{
var dbname = (fsql.CodeFirst as CodeFirstProvider)._commonUtils.GetEntityTableAttribute(attr.Type).Name;
var prop = attr.Type.GetProperty(attr.PropertyName);
var propValue = Utils.GetDataReaderValue(prop.PropertyType, attr.PropertyValue);
e.ModifyResult.Name = dbname;
e.ModifyResult.DisableSyncStructure = true;
var paramExp = Expression.Parameter(e.EntityType);
var lambdaExp = Expression.Lambda(typeof(Func<,>).MakeGenericType(e.EntityType, typeof(bool)),
Expression.Equal(Expression.MakeMemberAccess(Expression.TypeAs(paramExp, attr.Type), prop), Expression.Constant(propValue)), paramExp);
var applyOnly = fsql.GlobalFilter.GetType().GetMethods().Where(a => a.Name == "ApplyOnly").FirstOrDefault();
applyOnly.MakeGenericMethod(e.EntityType).Invoke(fsql.GlobalFilter, new object[] { $"MapTable_filter_{e.EntityType.FullName}", lambdaExp, false });
}
};
public class MapTableAttribute : Attribute
{
public Type Type { get; set; }
public string PropertyName { get; set; }
public object PropertyValue { get; set; }
public MapTableAttribute(Type type = null, string propertyName = null, object propertyValue = null)
{
Type = type;
PropertyName = propertyName;
PropertyValue = propertyValue;
}
}
``` ```
实现参考：https://github.com/dotnetcore/FreeSql/issues/1997
### 自定义实体特性 ### 自定义实体特性
比如项目内已经使用了其它 orm，如 efcore，这样意味着实体中可能存在 [Key]，但它与 FreeSql [Column(IsPrimary = true] 不同。 比如项目内已经使用了其它 orm，如 efcore，这样意味着实体中可能存在 [Key]，但它与 FreeSql [Column(IsPrimary = true] 不同。