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fix(openapi): preserve explicit null values in OpenAPI examples #11160

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fix(openapi): preserve explicit null values in OpenAPI examples #11160

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baaf1d3
chore(internal): add test for nullable balance_max in tiered rates
devin-ai-integration[bot] Dec 10, 2025
1194b6c
test: add explicit example with null balance_max and regression asser…
devin-ai-integration[bot] Dec 10, 2025
618c5c6
fix: preserve explicit null values in OpenAPI examples
devin-ai-integration[bot] Dec 10, 2025
69f8197
test: update valtown snapshots to reflect null value preservation
devin-ai-integration[bot] Dec 10, 2025
ef9b3d4
chore: trigger CI re-run for updated PR title
devin-ai-integration[bot] Dec 10, 2025
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8 changes: 7 additions & 1 deletion ...ges/cli/api-importers/openapi/openapi-ir-parser/src/schema/examples/ExampleTypeFactory.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -91,6 +91,10 @@ export class ExampleTypeFactory {
case "literal":
return FullExample.literal(schema.value);
case "nullable": {
// Explicit example of null should win over schema-level examples
if (example === null) {
return FullExample.null({});
}
if (
example == null &&
!this.hasExample(schema.value, 0, visitedSchemaIds, options) &&
Expand Down Expand Up @@ -474,7 +478,9 @@ export class ExampleTypeFactory {

const propertyExampleFromParent = fullExample[property];
const propertySchemaExample = this.getSchemaExample(schema.schema);
const exampleToUse = propertyExampleFromParent ?? propertySchemaExample;
// If the property is explicitly present in the example (even if null),
// treat that as authoritative; only fall back to schema example if it's absent.
const exampleToUse = inExample ? propertyExampleFromParent : propertySchemaExample;

const propertyExample = this.buildExampleHelper({
schema: schema.schema,
Expand Down
25 changes: 3 additions & 22 deletions ...rters/openapi/openapi-ir-to-fern-tests/src/__test__/__snapshots__/openapi-ir/valtown.json
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Original file line number Diff line number Diff line change
Expand Up @@ -475,11 +475,7 @@
"type": "primitive"
},
"profileImageUrl": {
"value": {
"value": "profileImageUrl",
"type": "string"
},
"type": "primitive"
"type": "null"
},
"url": {
"value": {
Expand Down Expand Up @@ -1390,11 +1386,7 @@
"type": "primitive"
},
"profileImageUrl": {
"value": {
"value": "profileImageUrl",
"type": "string"
},
"type": "primitive"
"type": "null"
},
"url": {
"value": {
Expand Down Expand Up @@ -3334,11 +3326,7 @@
"type": "primitive"
},
"profileImageUrl": {
"value": {
"value": "profileImageUrl",
"type": "string"
},
"type": "primitive"
"type": "null"
},
"url": {
"value": {
Expand Down Expand Up @@ -4608,13 +4596,6 @@
"type": "double"
},
"type": "primitive"
},
"lastInsertRowid": {
"value": {
"value": "lastInsertRowid",
"type": "string"
},
"type": "primitive"
}
},
"type": "object"
Expand Down
14 changes: 6 additions & 8 deletions ...mporters/openapi/openapi-ir-to-fern-tests/src/__test__/__snapshots__/openapi/valtown.json
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Original file line number Diff line number Diff line change
Expand Up @@ -999,7 +999,7 @@ API endpoints",
"links": {
"self": "self",
},
"profileImageUrl": "profileImageUrl",
"profileImageUrl": null,
"url": "https://val.town/u/tmcw",
"username": "tmcw",
},
Expand Down Expand Up @@ -1303,7 +1303,7 @@ service:
id: 00000000-0000-0000-0000-000000000000
bio: Hello world
username: tmcw
profileImageUrl: profileImageUrl
profileImageUrl: null
url: https://val.town/u/tmcw
links:
self: self
Expand Down Expand Up @@ -2534,7 +2534,7 @@ give access to details and data from the requesting user.",
"links": {
"self": "self",
},
"profileImageUrl": "profileImageUrl",
"profileImageUrl": null,
"tier": "pro",
"url": "url",
"username": "tmcw",
Expand Down Expand Up @@ -3304,7 +3304,7 @@ service:
id: 00000000-0000-0000-0000-000000000000
bio: Hello world
username: tmcw
profileImageUrl: profileImageUrl
profileImageUrl: null
url: url
links:
self: self
Expand Down Expand Up @@ -3728,7 +3728,6 @@ docs: Search
"columns": [
"id",
],
"lastInsertRowid": "lastInsertRowid",
"rows": [
[
1,
Expand Down Expand Up @@ -4238,7 +4237,6 @@ service:
rows:
- - 1
rowsAffected: 0
lastInsertRowid: lastInsertRowid
source:
openapi: ../openapi.yml
display-name: sqlite
Expand Down Expand Up @@ -4272,7 +4270,7 @@ docs: SQLite
"links": {
"self": "self",
},
"profileImageUrl": "profileImageUrl",
"profileImageUrl": null,
"url": "https://val.town/u/tmcw",
"username": "tmcw",
},
Expand Down Expand Up @@ -4441,7 +4439,7 @@ service:
id: 00000000-0000-0000-0000-000000000000
bio: Hello world
username: tmcw
profileImageUrl: profileImageUrl
profileImageUrl: null
url: https://val.town/u/tmcw
links:
self: self
Expand Down
7 changes: 6 additions & 1 deletion packages/cli/api-importers/v3-importer-commons/src/converters/ExampleConverter.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -832,7 +832,12 @@ export class ExampleConverter extends AbstractConverter<AbstractConverterContext
};
} else {
const propExampleFromParent = exampleObj[key];
const propertyExample = propExampleFromParent ?? this.maybeResolveSchemaExample(property);
// Use the example from parent if it exists (including explicit null values)
// Only fall back to schema example if the property is truly undefined
const propertyExample =
propExampleFromParent !== undefined
? propExampleFromParent
: this.maybeResolveSchemaExample(property);
const exampleConverter = new ExampleConverter({
breadcrumbs: [...this.breadcrumbs, key],
context: this.context,
Expand Down
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