Set 'default' field type as anything possible

[MathieuAvila]

Default can be anything.

Same problem than MR #104 : unable to write UT, the following error occurs:

============================================================================================== ERRORS =============================================================================================== ______________________________________________________________________________ ERROR collecting tests/fastapi_test.py _______________________________________________________________________________ tests/fastapi_test.py:15: in <module> from api.main import app tests/api/main.py:59: in <module> def getPet(pet_id: int = Query(..., alias='petId')) -> Pets: ../.local/lib/python3.10/site-packages/fastapi/routing.py:706: in decorator self.add_api_route( ../.local/lib/python3.10/site-packages/fastapi/routing.py:645: in add_api_route route = route_class( ../.local/lib/python3.10/site-packages/fastapi/routing.py:491: in __init__ self.dependant = get_dependant(path=self.path_format, call=self.endpoint) ../.local/lib/python3.10/site-packages/fastapi/dependencies/utils.py:261: in get_dependant type_annotation, depends, param_field = analyze_param( ../.local/lib/python3.10/site-packages/fastapi/dependencies/utils.py:410: in analyze_param assert isinstance(field_info, params.Path), ( E AssertionError: Cannot use Queryfor path param 'pet_id' ====================================================================================== short test summary info ====================================================================================== ERROR tests/fastapi_test.py - AssertionError: Cannot useQuery for path param 'pet_id' !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ========================================================================================= 1 error in 0.49s ==========================================================================================

[Dorthu]

The jsonschema spec says the following about default:

This keyword can be used to supply a default JSON value associated
with a particular schema. It is RECOMMENDED that a default value be
valid against the associated schema.

That's not exactly prescriptive, but per RFC-2119:

3. SHOULD This word, or the adjective "RECOMMENDED", mean that there
   may exist valid reasons in particular circumstances to ignore a
   particular item, but the full implications must be understood and
   carefully weighed before choosing a different course.

As written today, this example schema is invalid:

Example:
  type: integer
  default: "this is a string"

That's clearly an oversimplified example, but I guess the question is: why would default need to accept a value that isn't otherwise valid against the schema it's present in?

[Dorthu]

If we wanted to accept any type here, a wildcard would be more appropriate:

Suggested change

	self.default = self._get("default", [list, dict, str, int, float, bool]) # TODO - str as a default?
	self.default = self._get("default", "*")