"Type" keyword in property behaves incorrectly in GroupBy (via ToDistinctList)

[brad302]

I believe I’ve found an issue with the System.Linq.Dynamics.Core library and the GroupBy method.

It may very well be happening elsewhere but I’ll let you work that out.

With this JSON …

[
  {
    "Name": "Mr. Test Smith",
    "Type": "ACCOUNTSPAYABLE",
    "Something": {
      "Field1": "Test1",
      "Field2": "Test2"
    }
  },
  {
    "Name": "Mr. Test Smith",
    "Type": "DISPATCH",
    "Something": {
      "Field1": "Test1",
      "Field2": "Test2"
    }
  },
  {
    "Name": "Different Name",
    "Type": "ACCOUNTSPAYABLE",
    "Something": {
      "Field1": "Test3",
      "Field2": "Test4"
    }
  }
]

… when I execute GroupBy with the following keySelector … new (Type, Something.Field1) … the resulting data misrepresents the Type field values.

I then create an array of key/values with the grouping results and this is what comes out. You can see that property Type simply comes back as a value of 1 and not the values within the fields themselves.

This is the resulting response from my framework.

[
    {
        "Key": {
            "Type": 1,
            "Field1": "Test1"
        },
        "Values": [
            {
                "Name": "Mr. Test Smith",
                "Type": "ACCOUNTSPAYABLE",
                "Something": {
                    "Field1": "Test1",
                    "Field2": "Test2"
                }
            },
            {
                "Name": "Mr. Test Smith",
                "Type": "DISPATCH",
                "Something": {
                    "Field1": "Test1",
                    "Field2": "Test2"
                }
            }
        ]
    },
    {
        "Key": {
            "Type": 1,
            "Field1": "Test3"
        },
        "Values": [
            {
                "Name": "Different Name",
                "Type": "ACCOUNTSPAYABLE",
                "Something": {
                    "Field1": "Test3",
                    "Field2": "Test4"
                }
            }
        ]
    }
]

If I change the property name from “Type” to something else, it works fine.

Keen to get your thoughts on this.

Thanks

Brad

[StefH]

Hello @brad302,

Thanks for the information, however can you please make a complete working dotnet-fiddle example project to demonstrate this issue?

[brad302]

@StefH, hopefully this works for you ... https://dotnetfiddle.net/tOuoRd

I just realised the issue itself is buried in the ToDynamicList() method. From there, it's not doing what I expect. The Key that's being derived is skewed from the actual data when (as previously pointed out) the name of the property is Type.

Hopefully you can help.

Thanks

[brad302]

Any updates on this one by chance?

[StefH]

@brad302
No updates yet. I need to debug this issue.