ASP.NET web api 只返回数组中每个对象中的第一个对象

Question

startup.cs

   services.AddMvc().AddJsonOptions(options =>
        {
            options.SerializerSettings.ReferenceLoopHandling = ReferenceLoopHandling.Ignore;
        }).SetCompatibilityVersion(CompatibilityVersion.Version_2_1);

below is the sample response json returned by web api application when deployed to production. In localhost Iam getting data for "lastHourData","lastHourBeforeData" but not in production.

    [{
        "currentData": {
            "id": "213123123esdwq23d",
             "payload": [
                {
                    "key": "sdfsdf",
                    "value": "T"
                }
            ]
        },
        "lastHourData": null,
        "lastHourBeforeData": null
    },
    {
        "currentData": {
            "id": "sdfdsf",
             "payload": [
                {
                    "key": "gf",
                    "value": "T"
                }
            ]
        },
        "lastHourData": null,
        "lastHourBeforeData": null
    }]

below is the method, CurrentData,LastHourData and LastHourBeforeData each has 250 properities.

  public async Task<ComepletePanel> GetCompletePanelData(string id)
    {
        var queryRequest = RequstBuilder(id);
        var result = await queryRequest;
        var currentResult = result.Items.Select(Map2).FirstOrDefault();

        var queryRequest2 = getlastHourDataForMasterPanelBuilder(id);
        var result2 = await queryRequest2;
        var currentResult2 = result2.Items.Select(Map2).FirstOrDefault();

        var queryRequest3 = getlastBeforHourDataForMasterPanelBuilder(id);
        var result3 = await queryRequest3;
        var currentResult3 = result3.Items.Select(Map2).FirstOrDefault();

        var completData = new ComepletePanel
        {
            CurrentData = currentResult,
            LastHourData = currentResult2,
            LastHourBeforeData = currentResult3
        };

        return completData;
    }

below is the controller method

  public async Task<IEnumerable<ComepletePanel>> GetCustBoilersByCustId2(int id)
    {
        try
        {
            var recordData= await _context.table.ToListAsync();
            List<ComepletePanel> resultData= new List<ComepletePanel>();

            foreach (var b in recordData)
            {
                var CurrentResponse = await _getItem.GetCompletePanelData(b.id);
                resultData.Add(CurrentResponse);
            }

            return resultData;

        }
        catch (Exception ex)
        {
            _logger.LogError($"Failed to get all customers {ex}");
            return null;
        }
    }

Answer 1

You might need to serialize your object. Please see this for your reference: https://docs.microsoft.com/en-us/dotnet/standard/serialization/system-text-json-how-to

Answer 2

I think you should refactor your code to look more presentable and appealing to you like this. It might solve your problem.

Instead of you writing methods like getLastHourDataForMasterPanelBuilder(string id) and getlastHourDataForMasterPanelBuilder(string id) , first those names look too long and then just summarize your algorithm in one method such that you just pass a time or a logic data or time argument to it then it gets the data based on time you want.

public async Task<IEnumerable<CompletePanel>> GetCompleteData(string id params string[] args)
{
    List<QueryRequest> requests = new List<QueryRequest>();

    foreach (string argument in args)
    {
        var queryRequest = RequestBuilder(id);
        var result = await queryRequest;
        var knownResult = result.Items.Select(Map2).FirstOrDefault();
        requests.Add(knownResult);
    }

    return requests;
}

Then in your controller instead of performing a loop you just pass the id and time argument or logical argument as string to the method.