[BUG] Operations with multiple Tags triggers "unique" operation id generator which appends _0 to operation names. #20066
Description
I use the Java Native client generator.
I have a operation with 2 tags.
This did work as expected with the method being generated in both "client" files for openapi generator version 7.8.0
When using openapi generator 7.9.0 with the exact same schema file this adds _0 to the code which causes it to no longer compile.
The operation id is actually unique in the file.
My analysis of the Bug:
The Bug appears to occur in:
org.openapitools.codegen.DefaultCodegen#addOperationToGroup
There is a
in line 5713 there is this: seenOperationIds.put(co.operationId, counter);
which gets called from DefaultGenerator#processOperations line 1586.
This line is in a for loop over all tags.
This can be fixed if the seenOperationsIds prepend the "tag" to the seen operation ids.