#23 updated extension to include offset paging extension

Ian-Webster · Jan 16, 2024 · d976944 · d976944
1 parent 064f719
commit d976944
Show file tree

Hide file tree

Showing 5 changed files with 39 additions and 1 deletion.
diff --git a/Example/DataAccess.Example.Data/Queries/BookQuery.cs b/Example/DataAccess.Example.Data/Queries/BookQuery.cs
@@ -33,4 +33,9 @@ public async Task<Connection<Book>> GetPagedBooks([Service] IBookRepository repo
     {
         return await repository.GetPagedBooksForGraphQuery(context, token);
     }
+
+    public async Task<CollectionSegment<Book>> GetOffsetPagedBooks([Service] IBookRepository repository, IResolverContext context, CancellationToken token)
+    {
+        return await repository.GetOffsetPagedBooksForGraphQuery(context, token);
+    }
 }
diff --git a/Example/DataAccess.Example.Data/Repositories/BookRepository.cs b/Example/DataAccess.Example.Data/Repositories/BookRepository.cs
@@ -73,4 +73,9 @@ public async Task<Connection<Book>> GetPagedBooksForGraphQuery(IResolverContext
     {
         return await _bookRepo.GetPagedQueryItems(context, token);
     }
+
+    public async Task<CollectionSegment<Book>> GetOffsetPagedBooksForGraphQuery(IResolverContext context, CancellationToken token)
+    {
+        return await _bookRepo.GetOffsetPagedQueryItems(context, token);
+    }
 }
diff --git a/Example/DataAccess.Example.Data/Repositories/IBookRepository.cs b/Example/DataAccess.Example.Data/Repositories/IBookRepository.cs
@@ -21,4 +21,6 @@ public interface IBookRepository
     Task<IEnumerable<Book>?> GetBooksForGraphQuery(IResolverContext context, CancellationToken token);
 
     Task<Connection<Book>> GetPagedBooksForGraphQuery(IResolverContext context, CancellationToken token);
+
+    Task<CollectionSegment<Book>> GetOffsetPagedBooksForGraphQuery(IResolverContext context, CancellationToken token);
 }
diff --git a/Extensions/DataAccess.Repository.HotChocolate/DataAccess.Repository.HotChocolate.csproj b/Extensions/DataAccess.Repository.HotChocolate/DataAccess.Repository.HotChocolate.csproj
@@ -9,7 +9,7 @@
     <Description>Extension to the DataAccess package adding GraphQL functionality via the HotChocolate library</Description>
     <PackageProjectUrl>https://github.com/Ian-Webster/DataAccess/Extensions/DataAccess.Repository.HotChocolate</PackageProjectUrl>
     <RepositoryUrl>https://github.com/Ian-Webster/DataAccess</RepositoryUrl>
-    <VersionPrefix>1.0.0</VersionPrefix>
+    <VersionPrefix>1.1.0</VersionPrefix>
     <VersionSuffix></VersionSuffix>
   </PropertyGroup>
 

diff --git a/Extensions/DataAccess.Repository.HotChocolate/QueryExtensions.cs b/Extensions/DataAccess.Repository.HotChocolate/QueryExtensions.cs
@@ -75,4 +75,30 @@ public static async Task<Connection<TEntity>> GetPagedQueryItems<TEntity>(this I
             .Sort(context)
             .ApplyCursorPaginationAsync(context, cancellationToken:token);
     }
+
+    /// <summary>
+    /// Returns a collection of TEntity, filtered, sorted, offset paged and projected using extension methods from https://chillicream.com/docs/hotchocolate/v13/api-reference/extending-filtering
+    /// </summary>
+    /// <remarks>
+    /// Variation of cursor paging that uses skip/take instead of cursor data, see https://chillicream.com/docs/hotchocolate/v13/fetching-data/pagination/#offset-pagination
+    /// </remarks>
+    /// <typeparam name="TEntity">entity type for the repository</typeparam>
+    /// <param name="repository">IRepository</param>
+    /// <param name="context">HotChocolate filter context, this is used by the IQueryable extensions to apply filtering, sorting, pagination and projection</param>
+    /// <param name="token"></param>
+    /// <returns></returns>
+    public static async Task<CollectionSegment<TEntity>> GetOffsetPagedQueryItems<TEntity>(this IRepository<TEntity> repository,
+               IResolverContext context, CancellationToken token) where TEntity : class
+    {
+        var take = context.ArgumentValue<int>("take");
+        var skip = context.ArgumentValue<int>("skip");
+
+        return await repository.DbSet
+            .AsNoTracking()
+            .AsQueryable()
+            .Filter(context)
+            .Project(context)
+            .Sort(context)
+            .ApplyOffsetPaginationAsync(skip, take, token);
+    }
 }