default values are not picked, if properties are referenced (for OpenAPI yaml)

[mplatzer]

Describe the bug
Default values are not picked, if properties are referenced (for OpenAPI yaml).

Note: Interestingly minimum and maximum values are correctly picked up. See below.

To Reproduce

Example schema:

components:
  schemas:
    Model:
      type: "object"
      properties:
        settingA:
          type: "number"
          default: 5
          minimum: 0
          maximum: 10
        settingB:
          $ref: "#/components/schemas/ModelSettingB"
    ModelSettingB:
      type: "number"
      default: 5
      minimum: 0
      maximum: 10

Used commandline:

 datamodel-codegen --input hello.yaml --input-file-type openapi --collapse-root-models

Current Output:

class Model(BaseModel):
    settingA: Optional[confloat(ge=0.0, le=10.0)] = 5
    settingB: Optional[confloat(ge=0.0, le=10.0)] = None

Expected Output:

class Model(BaseModel):
    settingA: Optional[confloat(ge=0.0, le=10.0)] = 5
    settingB: Optional[confloat(ge=0.0, le=10.0)] = 5

to happen.

Version:

• OS: Mac OS
• Python version: 3.11.0
• datamodel-code-generator version: 0.26.4