ASP.NET Core 3.1 GraphQL demo with Hot Chocolate library

• Pure code first approach for simple code
• How to use GroupDataLoader (https://hotchocolate.io/docs/dataloaders#group-dataloader)
• Filtering, sorting, cursorbased pagination (https://hotchocolate.io/docs/pagination#relay-style-cursor-pagination)
• Shows a solution for GraphQL executor's DataContext concurrency problem

How to test

Install .NET Core SDK 3.1: https://dotnet.microsoft.com/download/dotnet-core/3.1

In the project root directory execute this command: dotnet watch run

Open the GraphQL playground at to execute queries: http://localhost:5000/graphql/playground

Used libraries

• ASP.NET Core 3.1
• EF Core 3.1
• SQLite
• HotChocolate 10.4.0-rc.0

Domain model

Post, Comment, Tag

Sample queries

Comments with filter & sort

query {
  comments(
    order_by: { id: ASC }, 
    where: { AND: [{ text_starts_with: "Post2" }, {id_lt: 4}] }) {
    id
    text
  }
}