Allow path parameter as enum strings

src/buildV3.ts

@@ -60,6 +60,7 @@ export default (openapi: OpenAPIV3.Document) => {
                     [] as OpenAPIV3.ParameterObject[]
                   )
                 ],
+                openapi,
                 false
               )
             ),

src/builderUtils/getDirName.ts

@@ -1,17 +1,24 @@
 import { OpenAPIV3 } from 'openapi-types'
-import { getPropertyName, schema2value } from './converters'
+import { getPropertyName, isRefObject, schema2value } from './converters'
+import { resolveSchemasRef } from './resolvers'
 
-export default (text: string, params: OpenAPIV3.ParameterObject[], required: boolean) => {
+export default (text: string, params: OpenAPIV3.ParameterObject[], openapi: OpenAPIV3.Document, required: boolean) => {
   if (text === '*') return '_any'
   if (!/^{/.test(text)) {
     return text
   }
 
   const valName = text.slice(1, -1)
-  const schemaVal = schema2value(
-    params.find(p => p.in === 'path' && p.name === valName)?.schema,
-    required
-  )
+
+  let schema = params.find(p => p.in === 'path' && p.name === valName)?.schema
+  if (schema && isRefObject(schema)) {
+    const referencedSchema = resolveSchemasRef(openapi, schema.$ref)
+    if (referencedSchema.type === 'string' || referencedSchema.type === 'number') {
+      schema = referencedSchema
+    }
+  }
+
+  const schemaVal = schema2value(schema, required)
 
   return `_${getPropertyName(valName)}${
     schemaVal && typeof schemaVal.value === 'string' ? `@${schemaVal.value}` : ''