Can't create a request body that is an array of integers

[bryandyck]

Describe the bug
I'm using the extend_schema to specify a request body that is simply an array of integers, however in the generated schema (no errors or warning were displayed during the generation) the request body is simply omitted.

To Reproduce

    @extend_schema(
        operation_id='batch_delete_material',
        summary='Batch Delete Material',
        description="""Performs batch delete of materials records. The request body must be a an array of ids.""",
        request={
            "type": "array",
            "items": {"type": "integer"}
        },
        responses=common_types.BATCH_JOB_RESPONSES
    )
    @action(methods=['DELETE'], detail=False)
    def batch_delete_method(self, request):
        return super().batch_delete_method(request)

generates this schema:

        "/api/v1/batch_delete_method/": {
            "delete": {
                "operationId": "batch_delete_material",
                "description": "Performs batch delete of materials records. The request body must be a an array of ids.",
                "summary": "Batch Delete Material",
                "tags": [
                    "Global Configuration"
                ],
                "security": [
                    {
                        "jwtAuth": []
                    },
                    {
                        "tokenAuth": []
                    }
                ],
                "responses": {
                    "200": {
                        "content": {
                            "application/json": {
                                "schema": {
                                    "type": "object",
                                    "properties": {
                                        "id": {
                                            "type": "string",
                                            "format": "uuid"
                                        }
                                    }
                                }
                            }
                        },
                        "description": "Successful response."
                    }
                }
            }
        },

Expected behavior
I expected there to be a requestBody parameter with an appropriate schema such as:

        "/api/v1/batch_delete_method/": {
            "delete": {
                "operationId": "batch_delete_material",
                "description": "Performs batch delete of materials records. The request body must be a an array of ids.",
                "summary": "Batch Delete Material",
                "tags": [
                    "Global Configuration"
                ],
                "requestBody": {
                    "content": {
                        "application/json": {
                            "schema": {
                                "type": "array",
                                "items": {
                                    "type": "integer"
                                }
                            }
                        }
                    },
                    "required": true
                },
                "security": [
                    {
                        "jwtAuth": []
                    },
                    {
                        "tokenAuth": []
                    }
                ],
                "responses": {
                    "200": {
                        "content": {
                            "application/json": {
                                "schema": {
                                    "type": "object",
                                    "properties": {
                                        "id": {
                                            "type": "string",
                                            "format": "uuid"
                                        }
                                    }
                                }
                            }
                        },
                        "description": "Successful response."
                    }
                }
            }
        },

[tfranzel]

Hey @bryandyck, that is on purpose and has been raised before. See #809 for a detailed explanation.

tldr: OpenAPI 3.0.3 (we are not yet on 3.1) does not support request bodies on DELETE operations.

[bryandyck]

Thanks @tfranzel!