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Fix CRUD notes

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Marcello Lamonaca 2021-05-08 12:43:30 +02:00
parent cd1fa67960
commit 8b5e725208
1 changed files with 13 additions and 90 deletions
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103
.NET/Database/EntityFramework.md
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@ -88,31 +88,10 @@ dotnet ef database update
### Create ### Create
```cs ```cs
public static bool InsertOne(Entity entity) context.Add(entity);
{ context.AddRange(entities);
int rows = 0;
using(var context = new Context()) context.SaveChanges();
{
context.Add(entity);
context.SaveChanges();
}
return rows == 1;
}
public static bool InsertMany(IEnumerable<Entity> entities)
{
int rows = 0;
using(var context = new Context())
{
context.AddRange(entities);
context.SaveChanges();
}
return rows == entities.Count();
}
``` ```
### Read ### Read
@ -120,83 +99,27 @@ public static bool InsertMany(IEnumerable<Entity> entities)
[Referenced Object Not Loading Fix](https://stackoverflow.com/a/5385288) [Referenced Object Not Loading Fix](https://stackoverflow.com/a/5385288)
```cs ```cs
public static List<Entity> SelectAll() context.Entities.ToList();
{ context.Entities.Find(id);
using(var context = new Context())
{
return context.Entities.ToList();
}
}
static Entity SelectOneById(int id) // force read of foreign key identifying referenced obj
{ context.Entities.Include(c => c.ForeignObject).Find(id);
using(var context = new Context())
{
return context.Entities.Find(id);
// force read of foreign key identifying referenced obj
return context.Entities.Include(c => c.ForeignObject).Find(id);
}
}
``` ```
### Update ### Update
```cs ```cs
public static bool UpdateOne(Entity entity) context.Entities.Update(entity);
{ context.UpdateRange(entities);
int rows = 0;
using(var context = new Context()) context.SaveChanges();
{
context.Entities.Update(entity);
context.SaveChanges();
}
return rows == 1;
}
public static bool UpdateMany(IEnumerable<Entity> entities)
{
int rows = 0;
using(var context = new Context())
{
context.UpdateRange(entities);
context.SaveChanges();
}
return rows == entities.Count();
}
``` ```
### Delete ### Delete
```cs ```cs
public static bool DeleteOne(Entity entity) context.Entities.Remove(entity);
{ context.RemoveRange(entities);
int rows = 0;
using(var context = new Context()) context.SaveChanges();
{
context.Entities.Remove(entity);
context.SaveChanges();
}
return rows == 1;
}
public static bool DeleteMany(IEnumerable<Entity> entities)
{
int rows = 0;
using(var context = new Context())
{
context.RemoveRange(entities);
context.SaveChanges();
}
return rows == entities.Count();
}
``` ```