[BUG] [Rust] fails to compile when multiple enum fields are used within discriminator

[aeneasr]

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

When using a discriminator:

      "uiNodeAttributes": {
        "discriminator": {
          "mapping": {
            "a": "#/components/schemas/uiNodeAnchorAttributes",
            "img": "#/components/schemas/uiNodeImageAttributes",
            "input": "#/components/schemas/uiNodeInputAttributes",
            "script": "#/components/schemas/uiNodeScriptAttributes",
            "text": "#/components/schemas/uiNodeTextAttributes"
          },
          "propertyName": "node_type"
        },
        "oneOf": [
          {
            "$ref": "#/components/schemas/uiNodeInputAttributes"
          },
          {
            "$ref": "#/components/schemas/uiNodeTextAttributes"
          },
          {
            "$ref": "#/components/schemas/uiNodeImageAttributes"
          },
          {
            "$ref": "#/components/schemas/uiNodeAnchorAttributes"
          },
          {
            "$ref": "#/components/schemas/uiNodeScriptAttributes"
          }
        ],

with a type that has a required enum:

      "uiNodeInputAttributes": {
        "description": "InputAttributes represents the attributes of an input node",
        "properties": {
          // ...
          "autocomplete": {
            "description": "The autocomplete attribute for the input.",
            "enum": [
              "email",
              "tel",
              "url",
              "current-password",
              "new-password",
              "one-time-code"
            ],
            "type": "string"
          },
          "type": {
            "description": "The input's element type.",
            "type": "string",
            "enum": [
              "text",
              "password",
              "number",
              "checkbox",
              "hidden",
              "email",
              "tel",
              "submit",
              "button",
              "datetime-local",
              "date",
              "url"
            ],
          },
          // ...
        },
        "required": [
          // ...
          "type",
          // ...
        ],
        "type": "object"
      },

rust does not compile because the Type enum is missing from the UiNodeAttributes definition. It does exist in the UiNodeInputAttributes definition though! Interestingly, the AutoComplete enum works just fine:

error[E0412]: cannot find type `TypeEnum` in this scope
  --> src/models/ui_node_attributes.rs:66:16
   |
66 |         _type: TypeEnum,
   |                ^^^^^^^^ not found in this scope
   |
help: consider importing one of these items
   |
13 | use crate::models::expand_tree::TypeEnum;
   |
13 | use crate::models::ui_node::TypeEnum;
   |
13 | use crate::models::ui_node_input_attributes::TypeEnum;

If we remove the enum from type, this will work though.

openapi-generator version

5.4.0 to 6.0.1

OpenAPI declaration file content or url

Not working:

https://raw.githubusercontent.com/ory/sdk/master/spec/client/v0.2.0-alpha.3.json

Working:

https://raw.githubusercontent.com/ory/sdk/master/spec/client/v0.2.0-alpha.4.json

Generation Details

#rust yaml
packageName: ${RUST_PACKAGE_NAME}
packageVersion: $VERSION
library: reqwest
supportAsync: true
enumNameSuffix: Enum

  openapi-generator-cli version-manager set 6.0.1
  openapi-generator-cli generate -i "${SPEC_FILE}" \
    -g rust \
    -o "$dir" \
    --git-user-id ory \
    --git-repo-id sdk \
    --git-host github.com \
    -c ./config/client/rust.yml.proc.yml

[aeneasr]

Dupe #13257