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Oct 16, 2024
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Add missed 8.0 breaking changes. #4825

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577bd4e
Add missed 8.0 breaking changes.
AndriySvyryd Oct 5, 2024
a66ac84
Update ToC
AndriySvyryd Oct 16, 2024
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42 changes: 41 additions & 1 deletion entity-framework/core/what-is-new/ef-core-8.0/breaking-changes.md
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Expand Up @@ -2,7 +2,7 @@
title: Breaking changes in EF Core 8.0 (EF8) - EF Core
description: Complete list of breaking changes introduced in Entity Framework Core 8.0 (EF8)
author: ajcvickers
ms.date: 12/18/2023
ms.date: 10/04/2024
uid: core/what-is-new/ef-core-8.0/breaking-changes
---

Expand Down Expand Up @@ -34,6 +34,8 @@ EF Core 8 targets .NET 8. Applications targeting older .NET, .NET Core, and .NET
| [Scaffolding may generate different navigation names](#navigation-names) | Low |
| [Discriminators now have a max length](#discriminators) | Low |
| [SQL Server key values are compared case-insensitively](#casekeys) | Low |
| [Multiple AddDbContext calls are applied in different order](#AddDbContext) | Low |
| [EntityTypeAttributeConventionBase replaced with TypeAttributeConventionBase](#attributeConventionBase) | Low |

## High-impact changes

Expand Down Expand Up @@ -533,3 +535,41 @@ protected override void OnModelCreating(ModelBuilder modelBuilder)
});
}
```

<a name="AddDbContext"></a>

### Multiple AddDbContext calls are applied in different order

[Tracking Issue #32518](https://github.com/dotnet/efcore/issues/32518)

#### Old behavior

Previously, when multiple calls to `AddDbContext`, `AddDbContextPool`, `AddDbContextFactory` or `AddPooledDbContextFactor` were made with the same context type but conflicting configuration, the first one won.

#### New behavior

Starting with EF Core 8.0, the configuration from the last call one will take precedence.

#### Why

This was changed to be consistent with the new method `ConfigureDbContext` that can be used to add configuration either before or after the `Add*` methods.

#### Mitigations

Reverse the order of `Add*` calls.

<a name="attributeConventionBase"></a>

### EntityTypeAttributeConventionBase replaced with TypeAttributeConventionBase

#### New behavior

In EF Core 8.0 `EntityTypeAttributeConventionBase` was renamed to `TypeAttributeConventionBase`.

#### Why

`TypeAttributeConventionBase` represents the functionality better as it now can be used for complex types and entity types.

#### Mitigations

Replace `EntityTypeAttributeConventionBase` usages with `TypeAttributeConventionBase`.
8 changes: 4 additions & 4 deletions entity-framework/toc.yml
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Expand Up @@ -32,10 +32,10 @@
items:
- name: Welcome!
href: core/index.md
- name: "What's new in EF Core 8.0"
href: core/what-is-new/ef-core-8.0/whatsnew.md
- name: "Breaking changes in EF Core 8.0"
href: core/what-is-new/ef-core-8.0/breaking-changes.md
- name: "What's new in EF Core 9.0"
href: core/what-is-new/ef-core-9.0/whatsnew.md
- name: "Breaking changes in EF Core 9.0"
href: core/what-is-new/ef-core-9.0/breaking-changes.md
- name: Getting started
items:
- name: EF Core Overview
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