How to require a json key to be present but allow the value to be null-CodePudding

I have a model with a nullable double in my API, I want anyone posting to it to be required to include the key in the json body. I am using the [FromBody] to receive the data from the json in the post function.

Any ideas if this is even possible?

CodePudding user response：

Annotate it with the required attribute https://docs.microsoft.com/en-us/aspnet/core/mvc/models/validation?view=aspnetcore-6.0#non-nullable-reference-types-and-required-attribute

or do a check in the controller for the property and if it’s null return BadRequest

CodePudding user response：

Solved it be installing the NewtonsoftJson package with the nuget package manager then adding this line to the ConfigureServices:

services.AddMvc().AddNewtonsoftJson();

And adding the following attribute to the property in the model

[JsonProperty(Required = Required.AllowNull]