RicoSuter/NSwag

NSwagStudio throws an System.ArgumentNullException

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#3067 opened on Sep 20, 2020

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 (4 comments) (0 reactions) (0 assignees)C# (6,291 stars) (1,189 forks)batch import
help wantedproject: NJsonSchematype: bug

Description

When I try to create a CSharp Client output from this Here Routing API OpenAPI specification, a System.ArgumentNullException is thrown, when I press the button 'Generate Outputs' or 'Gererate Files'.

Attached you find my NSwagStudio file. Routing.zip

Contributor guide

Tech stack
csharprest api
Domain
backendapi
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
C#NSwagOpenAPI
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
First, reproduce the issue by loading the provided OpenAPI specification (https://developer.here.com/documentation/routing api/8.8.0/swagger/v8.yaml) in NSwagStudio. Then, inspect the stack trace or use debugging to identify the null reference. Look at the CSharp client generator code in the NSwag repository, likely in the NSwag.CodeGeneration.CSharp project. Check for any recent changes or related issues. The attached ZIP file may provide additional configuration details. After locating the null, propose a fix with a null check or proper validation.