Setting default to all schemas when it's only set in one

[sixstone-qq]

What version of ogen are you using?

v1.9.0

Can this issue be reproduced with the latest version?

Yes

What did you do?

We have an OpenAPI 3.1.0 schema shared that includes a regular expression to validate the input:

components:
  schemas:
...
    Target:
      type: string
      pattern: ^[a-z0-9][-_a-z0-9]*[a-z0-9]$

We use it in different schemas such as:

components:
  schemas:
...
    RequestA:
      type: object
      properties:
        target:
          $ref: '#/components/schemas/Target'

When we add a new schema where we want it to have a default value such as:

components:
  schemas:
...
    RequestWithDefault:
      type: object
      properties:
        target:
          $ref: '#/components/schemas/Target'
          default: "default"

What did you expect to see?

Generate defaults for RequestWithDefault target property.

What did you see instead?

Generate defaults for all schemas that uses Target instead.

I tried by setting with allOf but complains with Complex defaults error.

--- a/oas_defaults_gen.go
+++ b/oas_defaults_gen.go
@@ -4,24 +4,60 @@ package api

 // setDefaults set default value of fields.
 func (s *RequestA) setDefaults() {
+       {
+               val := Target("default")
+               s.Target.SetTo(val)
+       }

[tdakkota]

Closing as duplicate of #1321.