Swagger UI endpoint expand/collapse issue

Q&A (please complete the following information)

• OS: Windows
• Browser: Chrome
• Version: 70.0.3538.102
• Method of installation: NuGet Package
• Swagger-UI version: 3.19.5
• Swagger/OpenAPI version: Swagger 2.0

Content & configuration

Swagger-UI configuration options:

app.UseSwaggerUI(c =>
 {
     c.SwaggerEndpoint("/swagger/v1/swagger.json", "Fifo API");
 });

?yourQueryStringConfig

Describe the bug you’re encountering

I am using Swagger UI in AspDotNetCore WebApi Application

When Trying expand the API endpoint drop down from UI, It will be expand all the endpoint with same name & different parameter instead of expanding that specific one.

To reproduce…

Steps to reproduce the behavior:

1. Go to http:/localhost/swagger/
2. Click on API Endpoint drop down (Make sure you have two endpoint with same name and different parameter)
3. Now if you look it will expand all endpoint drop down with same & different parameters
4. Same issue with collapse also.

Expected behavior

It should be expand only one API endpoint drop down which is got clicked

Screenshots

1. When page got loaded.

2. I have clicked on 3rd endpoint but all are expanded with same and different parameters

Additional context or thoughts

[hkosova]

It looks like several operations have the same operationId. Duplicate operationIds are not allowed by the OpenAPI Specification.

@nayanishdamania check the relevant annotations in your source code to make sure the operation IDs are unique, or open a ticket with the library you use to generate the spec.

[intenzive]

For everyone still having problems here like me and @mariuszkerl, changing the route name of one of the methods with same name will solve the issue.