No Enum generated for underlying type of array

If a field in a component has type array and subtype enum, no enum class is generated for this enum as it is for simple, non-composite enum field.

To Reproduce

Example schema:

      "arrayFieldWithEnum": {

        "items": {
          "enum": [
            "enum_value_1",
            "enum_value_2",
          ],
          "maxLength": 30,
          "minLength": 1,
          "pattern": "^.*$",
          "type": "string"
        },
        "maxItems": 3,
        "minItems": 1,
        "nullable": true,
        "type": "array",
        "uniqueItems": true,
      },

Generated with python:

    generate(
        input_=Path(schema_path),
        output=Path(models_path),
        reuse_model=True,
        validation=True,
        custom_template_dir=Path(templates_path),
        disable_timestamp=True,
        use_schema_description=True,
    )

Expected behavior A separate Enum class is generated for underlying type

Version:

• OS: Ubuntu 18.04
• Python version: 3.7
• datamodel-code-generator version: 0.11.14

[goodoldneon]

Seems like a bug to me. Ignoring those properties when there’s an enum makes sense to me, but they should be consistently ignored

[goodoldneon]

datamodel-code-generator seems to ignore the maxLength/minLength/pattern stuff sometimes, but not other times.

For example, the following OpenAPI:

openapi: "3.1.0"
components:
  schemas:
    Foo:
      type: object
      properties:
        bar:
          type: array
          items:
            enum:
              - hello
              - goodbye
            maxLength: 5
            minLength: 1
            type: string
            pattern: "^.*$"

Generates the following models:

class BarEnum(Enum):
    hello = 'hello'
    goodbye = 'goodbye'


class Foo(BaseModel):
    bar: Optional[List[BarEnum]] = None

But just adding maxItems causes the enum to be lost:

openapi: "3.1.0"
components:
  schemas:
    Foo:
      type: object
      properties:
        bar:
          type: array
          items:
            enum:
              - hello
              - goodbye
            maxLength: 5
            minLength: 1
            type: string
            pattern: "^.*$"
          maxItems: 3

class BarItem(BaseModel):
    __root__: constr(regex=r'^.*$', min_length=1, max_length=5)


class Foo(BaseModel):
    bar: Optional[List[BarItem]] = Field(None, max_items=3)