JsonIgnore attribute is enforced even when conditions are not met

[Flimzes]

The new recommended way of defining that null items should be ignored by the json serializer (System.Text.Json) is to add a JsonIgnore attribute, with a condition, like this:
[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]

A JsonSerializerOptions instance can be used instead, but there is currently no way of applying this to the built in httpClient methods - GetFromJson, PostAsJson and PutAsJson

Official documentation here: https://learn.microsoft.com/en-us/dotnet/standard/serialization/system-text-json/ignore-properties?pivots=dotnet-7-0

However, the odata client does not respect this condition, and ignores the property during deserialization and serialization despite the property having a value.

[swidz]

Today I faced the same issue:

I was trying to decorate entity properties as follows

class MyEntity
{
 [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingDefault)]
 public Guid MyProperty{ get; set; }
}

The expected behaviour is not to send this property when trying to insert/update if it is not set.
But when getting list of entities from a GET query and it was a part of the response it should be set.

Currently is is ignored in both POST and GET calls

[swidz]

This issue was also described in #888