GraphQL.EntityFrameworkCore.Helpers 0.1.0

GraphQL Helpers for EF Core - Connections, Selection from Request and More

Helpers to add bidirectional cursor based paginaton to your endpoints with the IQueryable extension method AsConnection. The method expects a request that implements IConnectionInput as input. Parameters is added to the ConnectionBuilder using the extension method Paged(defaultPageSize).

The Select(IResolveFieldContext context) extension methods helps you to avoid overfetching data by only selecting the fields requested. Foreign key fields are included by default as the value might be used for data loaded fields. AsConnection is using this method per default.

Getting Started

dotnet add package GraphQL.EntityFrameworkCore.Helpers

Configure

public void ConfigureServices(IServiceCollection services)
{
    services.AddGraphQLEntityFrameworkCoreHelpers(dbContext);
}

Examples

Connection

Connection<DroidGraphType>()
    .Name("Droids")
    .Paged()
    .ResolveAsync(async context =>
    {
        var request = new ConnectionInput();
        request.SetConnectionInput(context);

        return await dbContext.Droids.AsConnection(request);
    });

Select from Request

FieldAsync<ListGraphType<HumanGraphType>>(
    "Humans",
    resolve: async context => await dbContext.Humans.Select(context).ToListAsync());