你必须告诉 EF Core 哪个实体类需要一个查询过滤器,该过滤器是查询表达式,用来把不需要被看到的实体过滤掉。你可以在 DbContext 中使用以下代码手动完成此操作。 publicclassEfCoreContext:DbContext{publicEfCoreContext(DbContextOptions<EfCoreContext> option) :base(options){}protectedoverrideOnModelCreating(ModelBuil...
你必须告诉 EF Core 哪个实体类需要一个查询过滤器,该过滤器是查询表达式,用来把不需要被看到的实体过滤掉。你可以在 DbContext 中使用以下代码手动完成此操作。 public class EfCoreContext : DbContext { public EfCoreContext(DbContextOptions<EfCoreContext> option) : base(options) {} protected override OnMo...
本文翻译自《Entity Framework Core: Soft Delete using Query Filters》,由于水平有限,故无法保证翻译完全正确,欢迎指出错误。谢谢! 注意:我使用的是 Entity Framework Core 2.0 (2.0.0-preview2-final)。正式版发布后,功能可能存在变动。 继续探索Entity Framework Core 2.0,今天我将探讨如何轻松使用软删除(或逻辑删...
Entity Framework Core: Soft Delete using Query Filters Soft delete and unique constraint Using Unique Database Fields with Soft Deletes How It Work 它的做法其实挺简单直白的, 把原本的 Delete 操作变成 Update Deleted = true 在Select 的时候加 Where Deleted = false 当遇上 Unique 由于数据有 unique ...
Ef Core Soft Delete implementation A very simple implementation for soft deleting entities in Ef Core library. Note: EFCore.SoftDelete and SoftDelete are both based on this repository, both will get updates and will be maintained Usage: Step 1: Extend your application db context from SoftDeletes...
b.HasIndex(e => e.Name).IsUnique(); If the entity supports soft deletion, there may be a problem. When you delete an entity and continue adding the same entity, the index will prevent the addition. HasFilter seems to work, but needs to c...
Includes support for advanced SQL features such as CTEs, bulk copy, table hints, windowed functions, temporary tables, and database-side create/update/delete operations. GitHub repository|NuGet EFCore.SoftDelete An implementation for soft deleting entities. For EF Core: 3-6. ...
Entity Framework Plus是一个开源、免费(MIT License)、功能强大的 Entity Framework(EF)和 Entity Framework Core(EF Core) 扩展库,旨在提升 Entity Framework 的性能和克服其局限性。通过提供一系列实用的功能,如批量操作、查询缓存、查询延迟、LINQ动态、审计跟踪等,使得使用 Entity Framework 进行数据库开发变得更加...
.Delete; //使用BatchSize删除 vardate=DateTime.Now.AddYears(-2); ctx.Users.Where(x=>x.LastLoginDate<date) .Delete(x=>x.BatchSize=1000); 批量更新 如果您需要更新具有相同表达式的数百或数千个实体,则使用Entity Framework Core进行更新可能会非常慢。实体在更新之前首先加载到上下文中,这对性能非常不...
Persist and retrieve relational data by using EF Core - Training This module guides you through the steps to create a data access project. You connect to a relational database and construct create, read, update, and delete (CRUD) queries by using Entity Framework Core (EF Core)....