Global query filters in entity framework

  • PlayerRepository is a simple Entity Framework Core-based repository class defined in the solution's data Using Entity Framework this way can lead to large amounts of queries, right? The whole N+1 issue. That instance is resolved through the FuncDependencyResolver from a global context (built...
Nov 26, 2018 · Here is an example of a query that fetches the data with the possibility of adding a filter: View the code on Gist . As you can see, this code sample also uses the Include statement, but it’s retrieving the parameters in runtime.

This hub will allow multiple other projects to query for and receive certain data. Because we want to use Entity Framework for the data-access layer and WCF for the service layer, we figured we could just use the created Entity Framework Code First classes as DataContracts over WCF. Something like this:

Authorization Filter in MVC. Selecting The Entity Framework Approach to interact with the database. Here, we are going to use Entity Framework 6. So, from the Choose Your Version screen, choose the Entity framework 6.x and click on the Next button as shown below.
  • Entity Framework Dynamic Filter allows filtering all queries using a LINQ expression. Html Agility Pack Entity Framework Plus Entity Framework Effort Entity Framework Dynamic Filters Entity Framework GraphDiff Extension Methods NMemory NuGet Must Haves Find & Replace Tool.
  • Enable logging so you can see the SQL queries sent to the database in your output window. d bContext.Database.Log = s => System.Diagnostics. Debug.WriteLine(s); In many cases when you make queries and you load objects using entity framework’s navigation properties generated queries will use left join automatically.
  • Entity Framework Core provides global filters which by using a LINQ predicate applied to entity types in a DbContext in OnModelCreating. There are also a method to ignore filters, which done in a local read, edit or hard delete. Using the contact example, when a contact becomes available again a user...

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    The query is highlighted in the red box above. As you can see there is a lot of output, but there are options for filtering which are detailed in the docs. Entity Framework Core does a great job, but the above gives you an option to check in on what it is doing. If you are using SQL Server you could also...

    If I update all the fields in a row, ALL my indexes in that table are going to get updated. Okay, most likely I wont have this logic for all entities, but in certain heavy tables, I need If you are worried about the update statement that it might slow the query down, I would suggest a slightly different approach.

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    Entity Framework Core is what's known as an Object Relational Mapper (ORM). All data access in Entity Framework Core happens through a class that inherits from DbContext. In our project, we'll implement a AcmeDataContext which exposes a DbSet<Person> property of People.

    Mar 26, 2019 · Entity Framework Core–Configure Warnings Some posts ago I complained about my experience when using EF Core in combination with PostgreSQL. One of the things I didn’t liked was that when EF Core couldn’t translate a LINQ query, it silently felled back to client side evaluation, and executed the query on the in-memory collection.

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    Sep 12, 2017 · Entity Framework Core 2 was released recently. In today's episode we explore a new feature called Global Query Filters. See how query filters can be applied globally to easily support features ...

    Create global and scoped filters for Entity Framework queries. The filters are automatically applied to every query and can be used to support Access to DynamicFilters is done via extension methods in the EntityFramework.DynamicFilters namespace on the DbContext and DbModelBuilder classes.

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    Global Filter için benim başka bir önerim var. Aşağıdaki kod bloğu Entity’deki IsDeleted property’sine göre işlem yapıyor. Böylece eğer boolean tipinde IsDeleted property’si varsa, global query filter’a ekliyor. private void SetEFGlobalQueryFilters(ModelBuilder modelBuilder)

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    Install Entity Framework 6. I wanted to use EF6 in my MVC5 web project. A new MVC5 project has already reference to EF6, so there was nothing to do. But if you have different project you might have to install Entity Framework 6 manually. The easiest way is to use NuGet packages:

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    There are many new features introduced in Entity Framework Core (EF Core). Individual statements will be executed on the database as you can see in SQL Profiler. So batching with EF Core works quite well and it can certainly boost the speed and performance of your application to a great extent.

    Sep 04, 2017 · Suppose we have shared database for multi-tenant application and tenant ID is present for all entities. Suppose we have also data context class that applies global query filter to all entities like shown in my blog post Global query filters in Entity Framework Core 2.0. There is abstract BaseEntity class that has Id and TenantId properties and ...

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    Global query filters are another improvement. You can now specify filters in the model that are applied automatically to all entities of a type in all queries executed on the DbContext . However, some improvements that users of EF Core have been hoping for are still missing.

    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。

Entity Framework Core introduced Global Query Filters at the Entity level for application-wide filtering. Phil demonstrates creating a Global Query Filter as well as how to disable it for specific LINQ queries.
Note: This course is now updated to feature shorter videos and the original course has been split into two courses. Please check out Entity Framework Core Essential Training: 2 for the next installment. This comprehensive course shows how to work with Entity Framework Core.
If you use Entity Framework in Visual Studio 2008 and .NET 3.5, this is the book you want. Programming Entity Framework, 1st Edition offers experienced developers a thorough introduction to Microsoft's core framework for modeling and interacting with data in .NET applications. This hands-on tour provides a deep understanding of Entity Framework ...
2.2 Entity Set Filters. Entity set filter convention helps plug in a piece of filtering logic for entity set. It is done via adding an OnFilter[entity type name](IQueryable<T> entityset) method to the Api class.