C#•4mo ago

✅ how to merge two objects?

Sometimes ago I had this object:

public sealed record CreateFlightLegModel
{
    public string? Identity { get; init; }
    public LegIdentityArgument? LegIdentity { get; init; }
    public JsonDocument? LegData { get; set; }
}

public sealed record CreateFlightLegModel
{
    public string? Identity { get; init; }
    public LegIdentityArgument? LegIdentity { get; init; }
    public JsonDocument? LegData { get; set; }
}

LegData used in method for merging and for example we can do this: var firstLeg =

    JsonDocument.Parse(@"{
    ""fuel"":
    {
      ""fuel_invoice_1"": ""1"",
      ""fuel_invoice_2"": ""2"",
      ""fuel_invoice_3"": ""3""
    }
}");

    JsonDocument.Parse(@"{
    ""fuel"":
    {
      ""fuel_invoice_1"": ""1"",
      ""fuel_invoice_2"": ""2"",
      ""fuel_invoice_3"": ""3""
    }
}");

var secondLeg=

    JsonDocument.Parse(@"{
    ""fuel"":
    {
      ""fuel_invoice_2"": null,
      ""fuel_invoice_3"": null
    }
}");

    JsonDocument.Parse(@"{
    ""fuel"":
    {
      ""fuel_invoice_2"": null,
      ""fuel_invoice_3"": null
    }
}");

and the output will be:

{
    ""fuel"":
    {
      ""fuel_invoice_1"": ""1"",
      ""fuel_invoice_2"": null,
      ""fuel_invoice_3"": null
    }
}

{
    ""fuel"":
    {
      ""fuel_invoice_1"": ""1"",
      ""fuel_invoice_2"": null,
      ""fuel_invoice_3"": null
    }
}

then we decided move from JsonDocument to model and this merge doesn't work anymore in case I pasted earlier output will be:

""fuel"":
    {
      ""fuel_invoice_1"": null,
      ""fuel_invoice_2"": null,
      ""fuel_invoice_3"": null
    }

""fuel"":
    {
      ""fuel_invoice_1"": null,
      ""fuel_invoice_2"": null,
      ""fuel_invoice_3"": null
    }

can someone understand me what to do?

4 Replies

Pobiega•4mo ago

you will need to write the logic for merging two objects yourself, or use reflection (please dont)

SWEETPONY•4mo ago

unfortunately I should use reflection :when:

Pobiega•4mo ago

you really shouldnt. you could write a source generator that could generate a merge method thou that would be a much better option and provide the same "ease of use"

SWEETPONY•4mo ago

I'm a little bit tired of sg because this LegData model also was generated by sg from json schema :catlaugh: This is why I can't write the logic for merging two objects, objects can be changed a little bit after nuget package update but.. maybe using sg for merge object is a good idea okay I will try it

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✅ how to merge two objects?