Handle case where propertyName not defined in schemas and/or 0-length mapping

[sserrata]

Description

Handles cases where the discriminator propertyName is not defined in properties and/or there are no mapping schemas or oneOf or anyOf defined.

Motivation and Context

Provides additional fallback for edge case that could lead to rendering error.

How Has This Been Tested?

Tested using the following spec:

https://raw.githubusercontent.com/PaloAltoNetworks/pan.dev/refs/heads/master/openapi-specs/cspm/AssetInventory.json

Screenshots (if appropriate)

n/a

Types of changes

• Bug fix (non-breaking change which fixes an issue)

[github-actions]

Size Change: 0 B

Total Size: 2.02 MB

ℹ️ View Unchanged

Filename	Size
demo/.docusaurus/codeTranslations.json	2 B
demo/.docusaurus/docusaurus.config.mjs	13.9 kB
demo/.docusaurus/globalData.json	39 kB
demo/.docusaurus/i18n.json	267 B
demo/.docusaurus/registry.js	57.5 kB
demo/.docusaurus/routes.js	53.1 kB
demo/.docusaurus/routesChunkNames.json	22 kB
demo/.docusaurus/site-metadata.json	1.23 kB
demo/build/assets/css/styles.********.css	146 kB
demo/build/assets/js/main.********.js	693 kB
demo/build/assets/js/runtime~main.********.js	15.3 kB
demo/build/index.html	90.4 kB
demo/build/petstore/add-pet/index.html	27.4 kB
demo/build/petstore/create-user/index.html	21.5 kB
demo/build/petstore/create-users-with-array-input/index.html	21.5 kB
demo/build/petstore/create-users-with-list-input/index.html	21.5 kB
demo/build/petstore/delete-order/index.html	21.5 kB
demo/build/petstore/delete-pet/index.html	21.6 kB
demo/build/petstore/delete-user/index.html	21.8 kB
demo/build/petstore/find-pets-by-status/index.html	22.3 kB
demo/build/petstore/find-pets-by-tags/index.html	22.9 kB
demo/build/petstore/get-inventory/index.html	20.8 kB
demo/build/petstore/get-order-by-id/index.html	21.8 kB
demo/build/petstore/get-pet-by-id/index.html	22.4 kB
demo/build/petstore/get-user-by-name/index.html	21.9 kB
demo/build/petstore/login-user/index.html	22.4 kB
demo/build/petstore/logout-user/index.html	21.2 kB
demo/build/petstore/new-pet/index.html	21.8 kB
demo/build/petstore/pet/index.html	23.5 kB
demo/build/petstore/place-order/index.html	21 kB
demo/build/petstore/schemas/apiresponse/index.html	22.8 kB
demo/build/petstore/schemas/cat/index.html	36.7 kB
demo/build/petstore/schemas/category/index.html	23.9 kB
demo/build/petstore/schemas/dog/index.html	37.1 kB
demo/build/petstore/schemas/honeybee/index.html	37.2 kB
demo/build/petstore/schemas/id/index.html	20.9 kB
demo/build/petstore/schemas/order/index.html	25 kB
demo/build/petstore/schemas/pet/index.html	36.6 kB
demo/build/petstore/schemas/tag/index.html	22.3 kB
demo/build/petstore/schemas/user/index.html	44.8 kB
demo/build/petstore/store/index.html	21.5 kB
demo/build/petstore/subscribe-to-the-store-events/index.html	27.8 kB
demo/build/petstore/swagger-petstore-yaml/index.html	27.8 kB
demo/build/petstore/update-pet-with-form/index.html	21.7 kB
demo/build/petstore/update-pet/index.html	22.2 kB
demo/build/petstore/update-user/index.html	21.8 kB
demo/build/petstore/upload-file/index.html	21.6 kB
demo/build/petstore/user/index.html	22.4 kB

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[github-actions]

Visit the preview URL for this PR (updated for commit 7446c51):

https://docusaurus-openapi-36b86--pr1044-0d6dffpx.web.app

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