首页 \ 问答 \ 将实体框架保存在单个实体类型上(Extend Entity Framework Save on a single Entity Type)

将实体框架保存在单个实体类型上(Extend Entity Framework Save on a single Entity Type)

 我有一个相当大的保存例程，使用Entity Framework更新数百个项目，然后一次保存整个项目。  
using (var dc = new EntityLayer.Entities())
{
    dc.Entity1.Prop1 = 1;
    dc.Entity1.Prop2 = 2;
    dc.Entity2.Prop1 = 1;
    dc.Entity2.Prop2 = 2; // Audit item
    dc.Entity2.Prop3 = 3; // Audit item
    dc.Entity3.Prop1 = 1;
    ...
    dc.SaveChanges();
}
 
 我希望能够做的是以某种方式扩展Save for a Individual Entity或者接受这个改变并启动另一种方法。  
 这样做的主要目的是挂钩我们的审计系统，审计系统只审计一些关键项目（例如上面简化版本中的Entity2.Prop2和Entity2.Prop3），但也可能启动一些其他例程，创建任务等等，但关键是 - 能做到吗？  
 基本上我打算删除我们必须为特定类型添加的额外审计线，如下所示：  
using (var dc = new EntityLayer.Entities())
{
    dc.Entity1.Prop1 = 1;
    dc.Entity1.Prop2 = 2;
    dc.Entity2.Prop1 = 1;
    dc.Entity2.Prop2 = 2;
    dc.Audit.CreateObject() { Type = "Entity2", Change = "Prop2", From = oldVal, To = 2}
    dc.Entity2.Prop3 = 3;
    dc.Audit.CreateObject() { Type = "Entity2", Change = "Prop3", From = oldVal, To = 3}
    ...
    dc.SaveChanges();
}

I have a rather large save routine that updates hundreds of items using the Entity Framework and then saves the whole lot in one go. 
using (var dc = new EntityLayer.Entities())
{
    dc.Entity1.Prop1 = 1;
    dc.Entity1.Prop2 = 2;
    dc.Entity2.Prop1 = 1;
    dc.Entity2.Prop2 = 2; // Audit item
    dc.Entity2.Prop3 = 3; // Audit item
    dc.Entity3.Prop1 = 1;
    ...
    dc.SaveChanges();
}
 
What I would love to be able to do is somehow either extend the Save for an individual Entity or pick up on this change and kick off another method. 
The main purpose of this is to hook into our Audit system, which only audits some key items, (so for example only Entity2.Prop2 and Entity2.Prop3 in the simplified version above) but would also possibly kick off some other routines, creating tasks etc, but the crux is - can it be done? 
Basically I'm aiming to remove the extra audit line we have to put in for specific types as below: 
using (var dc = new EntityLayer.Entities())
{
    dc.Entity1.Prop1 = 1;
    dc.Entity1.Prop2 = 2;
    dc.Entity2.Prop1 = 1;
    dc.Entity2.Prop2 = 2;
    dc.Audit.CreateObject() { Type = "Entity2", Change = "Prop2", From = oldVal, To = 2}
    dc.Entity2.Prop3 = 3;
    dc.Audit.CreateObject() { Type = "Entity2", Change = "Prop3", From = oldVal, To = 3}
    ...
    dc.SaveChanges();
}

原文：https://stackoverflow.com/questions/6029048

更新时间：2022-02-16 06:02

最满意答案

 更换  
args = parser.parse_args()
 
 同  
args, unknown = parser.parse_known_args()
 
 例如，  
import argparse
parser = argparse.ArgumentParser()
parser.add_argument('--foo')
args, unknown = parser.parse_known_args(['--foo', 'BAR', 'spam'])
print(args)
# Namespace(foo='BAR')
print(unknown)
# ['spam']

Replace 
args = parser.parse_args()
 
with  
args, unknown = parser.parse_known_args()
 
For example, 
import argparse
parser = argparse.ArgumentParser()
parser.add_argument('--foo')
args, unknown = parser.parse_known_args(['--foo', 'BAR', 'spam'])
print(args)
# Namespace(foo='BAR')
print(unknown)
# ['spam']

将实体框架保存在单个实体类型上(Extend Entity Framework Save on a single Entity Type)

最满意答案

相关问答

Python argparse：“无法识别的参数”(Python argparse: “unrecognized arguments”)[2022-09-14]

使用Python argparse创建隐藏的参数(Creating hidden arguments with Python argparse)[2022-05-10]

如何使用python argparse解析可选参数？(How to parse optional arguments using python argparse?)[2023-02-17]

如何捕获导致argparse在Python中引发错误的值(How to catch the value that cause argparse to raise an error in Python)[2022-06-18]

Python argparse忽略无法识别的参数(Python argparse ignore unrecognised arguments)[2023-04-20]

Python argparse：参数太少(Python argparse: Too few arguments)[2022-03-02]

python argparse多个参数处理(python argparse multiple arguments processing)[2022-04-02]

忽略python argparse中的空格(To ignore space in python argparse)[2023-05-18]

python argparse的范围是什么(What is the scope of python argparse)[2023-09-01]

Python argparse with - 作为值(Python argparse with — as the value)[2024-02-02]

相关文章

最新问答