Updating Tags in a blog post doesn't update

When updating a blog post and changing the tags, after change those tags are not visible in the overview page nor in the search (for tags).

Root-Cause

When entering the update blog post page, the blog post is retrieved from the cache rather than the underlying repository. That leads to the problem, that the children are not tracked anymore and therefore don’t get updated.

Test to reproduce

[Fact]
public async Task GivenBlogPostWithTags_WhenLoadingAndDeleting_ThenShouldBeUpdated()
{
    var bp = new BlogPostBuilder().WithTags("tag 1").Build();
    var sut = new CachedRepository<BlogPost>(Repository, new MemoryCache(new MemoryCacheOptions()));
    await sut.StoreAsync(bp);
    var updateBp = new BlogPostBuilder().WithTags("tag 2").Build();
    var bpFromCache = await sut.GetByIdAsync(bp.Id);
    bpFromCache.Update(updateBp);
    await sut.StoreAsync(bpFromCache);

    var bpFromDb = await sut.GetByIdAsync(bp.Id);

    bpFromDb.Tags.Single().Content.Should().Be("tag 2");
}

[manishtiwari25]

can’t test now, because Pomelo.EntityFrameworkCore.MySql doesn’t support EF Core 8, they have opened an issue. I will raise a PR after they release something related to this.

[manishtiwari25]

looks good and I was also thinking the same approach, I will test it in MySQL and let you know, or make changes if needed. thanks for fixing 😃