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Showing content from https://github.com/OpenAPITools/openapi-generator/issues/1714 below:

[BUG] $ref to common parameter not being resolved · Issue #1714 · OpenAPITools/openapi-generator · GitHub

Validation is failing to resolve a $ref in the parameter list to a common parameter defined outside the operation. Neither refs local to the same file nor refs to external files work. Both should. I've tried it with both Swagger 2.0 and OAS 3.0 specs, both fail the same way.

Exception in thread "main" org.openapitools.codegen.SpecValidationException: There were issues with the specification. The option can be disabled via validateSpec (Maven/Gradle) or --skip-validate-spec (CLI).
 | Error count: 1, Warning count: 0
Errors: 
	-attribute paths.'/employees/{id}'. Declared path parameter id needs to be defined as a path parameter in path or operation level

	at org.openapitools.codegen.config.CodegenConfigurator.toClientOptInput(CodegenConfigurator.java:569)
	at org.openapitools.codegen.cmd.Generate.run(Generate.java:346)
	at org.openapitools.codegen.OpenAPIGenerator.main(OpenAPIGenerator.java:62)

4.0.0-SNAPSHOT

openapi: 3.0.0
info:
  title: Test
  description: Test YAML
  version: '1.0'
servers:
  - url: http://localhost
paths:
  /employees/{id}:
    get:
      operationId: getEmployeeById
      parameters:
        - $ref: '#/components/parameters/id'
      responses:
        200:
          description: Success
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/employee'
components:
  schemas:
    employee:
      type: object
      properties:
        name:
          type: string
      required:
        - name
  parameters:
    id:
      name: id
      in: path
      required: true
      schema:
        type: string

java -jar openapi-generator-cli-4.0.0-20181217.102953-101.jar generate -g html -i test.yaml

#455 seems to be related. But that one was resolved. So that makes this a regression.

This could be another issue with the swagger-parser like in #455.

timonbimon, tomghyselinck, caturner81, philcluff, jimschubert and 5 more

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