https://github.com/damikun/hcpaginationbug

This is bug example related to https://github.com/ChilliCream/hotchocolate/issues/2154
https://github.com/damikun/hcpaginationbug

Last synced: about 2 months ago
JSON representation

This is bug example related to https://github.com/ChilliCream/hotchocolate/issues/2154

• Host: GitHub
• URL: https://github.com/damikun/hcpaginationbug
• Owner: damikun
• Created: 2020-07-22T09:28:29.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2022-12-08T11:01:06.000Z (about 2 years ago)
• Last Synced: 2024-10-12T13:26:27.224Z (3 months ago)
• Language: C#
• Size: 15.9 MB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

        
# HCPaginationBug

This is bug reproduce repo... do not use this as example!

Related to bug: https://github.com/ChilliCream/hotchocolate/issues/2154

Test data included! (in Program.cs)

## Bug location

After quick check it looks like problem in this part but im not sure... i did not debug it yet... It looks like going from + over 0 to - is not handled...

under: https://github.com/ChilliCream/hotchocolate/blob/a7b1f39c686d2d572f0ef61ff9d8c0ceea90b795/src/HotChocolate/Core/src/Types/Types/Relay/QueryableConnectionResolver.cs 

```

      int count = temp.Count();

      int skip = count - last;

```

            

```

 protected virtual IQueryable GetLastEdges(

            IQueryable edges, int last,

            ref int offset)

        {

            if (last < 0)

            {

                throw new ArgumentOutOfRangeException(nameof(last));

            }

            IQueryable temp = edges;

            int count = temp.Count();

            int skip = count - last;

            if (skip > 1)

            {

                temp = temp.Skip(skip);

                offset += count;

                offset -= temp.Count();

            }

            return temp;

        }

```

# To Run

```

1 Fetch to local Git

2 Run: dotnet restore

3 Run: dotnet wacth run

```

Info: Running on .Net5 Standard

# Playground Query

```

  query Users(

        $first: PaginationAmount

        $last: PaginationAmount

        $after: String

        $before: String

      ) {

        users(

          first: $first

          after: $after

          before: $before

          last: $last

        ) {

          pageInfo {

            hasPreviousPage

            hasNextPage

            startCursor

            endCursor

          }

          edges {

            cursor

            node {

              iD

              name

            }

          }

        }

      }

```

## Query Variables

```

{

  "first": null,

  "last": 1 ,

  "before": "Mg==",

  "after": null

}

```

# SQLite database table

under:

appDB.db

| # | ID |  Name |

|:-:|:--:|:-----:|

| 1 | 1  | user1 |

| 2 | 2  | user2 |

| 3 | 3  | user3 |

| 4 | 4  | user4 |

# Packages:

```

 

    

    

    

    

    

    

    

    

    

    

    

    

    

    

    

      runtime; build; native; contentfiles; analyzers; buildtransitive

      all

    

 

  

```