Global query filters in entity framework

Comment 1. Entity Framework Core 2. It makes it easier to build multi-tenant applications and support soft deleting of entities. This blog post gives a deeper overview of how to use global query filters in real-life applications and how to apply global query filters to domain entities automatically.

Global Query Filters in Entity Framework Core 2.0

NET Core 2 that demonstrates global query filters in a more complex context. It demonstrates some ideas about how to apply global query filters to domain entities automatically. SQL-script for creating a simple database and filling it with test data is also there. This is how global query filters may look for soft delete.

When considering mission critical applications that are part of the digital core or enterprises, then there will not just be a couple of classes, although the architecture of applications is often complex.

The goal of this post is to demonstrate the following:. They use a simple base class and it is expected that all entities extend from the base class.

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Before talking about multi-tenancy, there must be some way for the web application to detect tenants related to the current request. It can be host header based detection, but it can also be something else. This post uses a dummy provider to keep things simple.

Before adding global query filters for all entity types, the entity types must be detected. So, type detection must support some kind of caching. These two methods go to the data context class. Architecture-wise, it could be a better idea if there is a separate service that returns entity types.

Don't SUCK With Entity Framework - Compiled Queries - Performance Tips Part 7

If you write a real application, then it's better to go with a separate provider. In this point, a little tricking is needed. The code there is not usable as it is, as the data context here has instance level dependency to ITenantProvider. Even I stare my eyes out when looking at this code. Even when I look at it hundred times it still looks crazy and awkward.

Global Query Filters

The web application is now ready for running. When comparing these two tables, it is easy to notice that the global query filters work and give the expected results. Global query filters are a nice addition to Entity Framework Core 2. For more complex scenarios, some tricky code is needed to apply global query filters automatically.

Hopefully there will be some better solution for this in the future, but currently, the solution given here makes excellent work too. See the original article here. Integration Zone. Over a million developers have joined DZone.Entity Framework Core 2.

It makes it easier to build multi-tenant applications and support soft deleting of entities. This blog post gives deeper overview about how to use global query filters in real-life applications and how to apply global query filters to domain entities automatically.

Sample solution. NET Core 2 that demonstrates global query filters in more complex context. It demonstrates some ideas about how to apply global query filters to domain entities automatically.

SQL-script for creating simple database and fill it with test data is also there. This is how global query filters may look like for soft delete.

When considering mission critical applications that are part of the digital core or enterprises then there will be not just couple of classes.

Although the architecture of applications is often complex. The goal of this post is to demonstrate the following:. They use simple base class and it is expected that all entities extend from the base class.

Before talking about multi-tenancy there must be some way for web application to detect tenant related to current request. It can be host header based detection but it can also be something else. This post uses dummy provider to keep things simple. I expect in this point that database is already created and application is configured to use it. Before adding global query filters for all entity types, the entity types must be detected. So, type detection must support some kind of caching.

These two methods go to data context class. Architecture-wise it could be better idea if there is separate service that returns entity types. If you write real application then better go with separate provider. In this point a little tricking is needed. The code there is not usable as it is as the data context here has instance level dependency to ITenantProvider.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. For my models I have a active attribute on all of them, and i want to filter all inactive if the model was not displayed on the administration What is the best way to do that, What I'm currently using is the following. And now I'm having some serious problems when i want to eagerly load some subrelations using include "Xmodel.

Ymodel" i called the globalDefaultScope in the get method for that collection that filters the collection but it keeps throwing this exception when some items in the collection are inactive. InvalidOperationException: The operation failed: The relationship could not be changed because one or more of the foreign-key properties is non-nullable. I also found this linkbut this way didn't work with eagerly loaded entries include.

SaveChanges the mentioned error is thrown. Note : Please Add Nuget package for System. Dynamic to have dynamic Linq Library. Learn more. Asked 6 years, 7 months ago. Active 6 years, 3 months ago. Viewed 10k times. ToList ; return list; And now I'm having some serious problems when i want to eagerly load some subrelations using include "Xmodel. Ymodel" i called the globalDefaultScope in the get method for that collection that filters the collection but it keeps throwing this exception when some items in the collection are inactive System.

Entry obj. Collection collection. Hilmi Hilmi 3, 5 5 gold badges 23 23 silver badges 54 54 bronze badges. If you do the include without applying the filter does it work, i. Can you show some code of how the include is applied.

TommyGrovnes the Question is updated, Thanks. Hilmi can you please include the database tables as well. Active Oldest Votes. If I give roles to every user and I have priority for every roles then this won't give error.

Please Let me know if you still need any other info.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information.

I try to make a global query. I know that this is possible in EF Core 2. What I believe is that you want to implement soft-delete in your application.

To apply global query filter you can follow this approach too. Learn more. Ask Question. Asked 1 year, 3 months ago. Active 1 year, 3 months ago. Viewed times. OnModelCreating modelBuilder ; modelBuilder. EF6 does not provide out of the box global query filter capability. Active Oldest Votes. Dynamic Library using NuGet. Include "whatever you need". Please read question before answer.

I know. If you read the answer you will understand I did not show you how to implement soft delete. I show you how to implement a global query filter according to your question with an extension method. Please read the answer carefully. What is a point of using System. Dynamic, why can't you just use.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.

If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. This library is powered by Entity Framework Extensions.

Create global and scoped filters for Entity Framework queries. Access to DynamicFilters is done via extension methods in the EntityFramework. The package is also available on NuGet: EntityFramework. This will create a filter to restrict queries on the Notes table to only those records made by people in the current users Organization. The filter will only be enabled if the current user is not an Administrator. And both expressions access properties in the current DbContext instance.

Filters should always follow any other model configuration - including the call to the base. OnModelCreating method. It is best to make the filter definitions the final step of OnModelCreating to make sure that they are not in effect until the entire model is fully configured.

All filters have global scope and will be used by all DbContexts. Each DbContext can also choose to provide a "scoped" filter value or can disable the filter via the DisableFilter extension method.

Scoped parameter changes and filter disabling will apply only to that DbContext and do not affect any existing or future DbContexts. Filters can be defined on a specific entity class or an interface.

Below is an example of a "soft delete" filter created on an ISoftDelete interface. This can allow you to vary the parameter value dynamically. For example, a filter can be created on the UserID and be provided per http request. Below is an example that obtains a "Person ID" from the Thread. This delegate will be evaluated each time the query is executed so it will obtain the "Person ID" associated with each request. In this example, the Note entity is "owned" by the current user.

This filter will ensure that all queries made for Note entities will always be restricted to the current user and it will not be possible for users to retrieve notes for other users.

This allows the parameter value expressions to reference the current DbContext instance. In this example, the value of the parameter will be set to the value of the CurrentPersonID property in the current MyContext instance. A parameter is created for each condition with parameter names "accountID" and "isDeleted":. If you require support for additional linq operators, please create an issue. Within a single DbContext instance, filter parameter values can also be changed.Such filters are automatically applied to any LINQ queries involving those Entity Types, including Entity Types referenced indirectly, such as through the use of Include or direct navigation property references.

Some common applications of this feature are:.

global query filters in entity framework

The following example shows how to use Global Query Filters to implement soft-delete and multi-tenancy query behaviors in a simple blogging model. You can view this article's sample on GitHub. Note the declaration of a tenantId field on the Blog entity. This will be used to associate each Blog instance with a specific tenant. Also defined is an IsDeleted property on the Post entity type.

This is used to keep track of whether a Post instance has been "soft-deleted". That is, the instance is marked as deleted without physically removing the underlying data. Model-level filters will use the value from the correct context instance that is, the instance that is executing the query.

It is currently not possible to define multiple query filters on the same entity - only the last one will be applied. You may also leave feedback directly on GitHub. Skip to main content. Exit focus mode. Tip You can view this article's sample on GitHub.

Note It is currently not possible to define multiple query filters on the same entity - only the last one will be applied. Is this page helpful? Yes No. Any additional feedback?

Skip Submit. Send feedback about This product This page. This page. Submit feedback. There are no open issues. View on GitHub.This feature is also refer as Model-level query filters. It allows to specify filter in the model level that are automatically applied to all queries that executed on the context on the specified type. It means that entity framework automatically adds the filter in where clause before executing the LINQ queries. Usually Global query filters are applied in OnModelCreating method of context.

This filters are also automatically applied to LINQ queries involving the entity types referenced indirectly like included as navigation property. It allows us to specify a filter in the model level that is automatically applied to all queries that are executed in the context of the specified type. It means that entity framework automatically adds the filter in the where clause before executing the LINQ queries. These filters are also automatically applied to LINQ queries involving entity types that are indirectly referenced, such as ones included as a navigation property.

Common uses of this feature are, Soft delete: an Entity Type defines an IsDeleted property and the application does not require deleted data. To demostrate the example, I have created Employee table and it has the IsDeleted column that is used to define whether the record is deleted or not. In some cases, we do not require these filters. It helps us to apply filters on entity types that a developer might forget during devlopment.

global query filters in entity framework

You can view or download the source code from the following GitHub link. View All. Jignesh Trivedi Updated date, Mar 02 This feature is also called model-level query filter. Soft delete: an Entity Type defines an IsDeleted property and the application does not require deleted data.

Multi-tenancy: an Entity Type defines a TenantId property. The following example shows how to apply global query filter to implement soft-delete. First define entities and context class Employee. Example code. It cannot contain references to navigation properties It can be defined only at root Entity Type of an inheritance hierarchy IgnoreQueryFilters method ignores all the filters on the entity type; i.

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global query filters in entity framework

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