René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"`allOf` code generation does not work with types from other packages","articleBody":"I have some standardized error struct which is used for all parts of my API, and put it into a separate package to make it easily reuasble\r\n```yaml\r\ncomponents:\r\n  schemas:\r\n    Error:\r\n      type: object\r\n      properties:\r\n        message:\r\n          type: string\r\n        details:\r\n          type: array\r\n          items:\r\n            $ref: \"#/components/schemas/ErrorDetail\"\r\n    ErrorDetail:\r\n      type: object\r\n      properties:\r\n        message:\r\n          type: string\r\n        target:\r\n          type: string\r\n```\r\n\r\nThis all works fine, but in some scenarios I'd like to have an example error message. So I use `allOf` to merge this struct with additional details:\r\n```yaml\r\nallOf:\r\n  - $ref: \"#/components/schemas/Error\" # I imported the errors.yaml in this components/schema to make errors.Error available.\r\n  - type: object\r\n    properties:\r\n      message:\r\n        example: \"File non-existing.txt not found\"\r\n```\r\n\r\nThis results in the follow code:\r\n```go\r\ntype FileNotFound struct {\r\n\t// Optional list of additional error details.\r\n\tDetails *[]ErrorDetail `json:\"details,omitempty\"`\r\n\tMessage interface{}    `json:\"message\"`\r\n}\r\n```\r\n\r\nThe problem is that `ErrorDetail` is not defined (it is defined in another package containing the generated code of errors.yaml). Error itself is working as the code generator created this line\r\n```go\r\ntype Error = externalRef0.Error\r\n```\r\n\r\n# Workaround\r\nImport ErrorDetail in the yaml file as well:\r\n```yaml\r\n    ErrorDetail:\r\n      # This is needed for workaround a code generation bug\r\n      $ref: \"./errors.yaml#/components/schemas/ErrorDetail\"\r\n```\r\nand it generates\r\n```go\r\ntype ErrorDetail = externalRef0.ErrorDetail\r\n```\r\n\r\nUnfortunately, linter detect that the ErrorDetail object is not used/referenced, so it issues a warning (in my IDE)","author":{"url":"https://github.com/veger","@type":"Person","name":"veger"},"datePublished":"2022-07-04T09:01:10.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/655/oapi-codegen/issues/655"}