fix(alias): add support for optional alias

pollination_dsl/alias/inputs.py

@@ -32,6 +32,7 @@ class _InputAliasBase(BaseModel):
  description: str = None
  default: Any = None
  spec: Dict = None
+ optional: bool = False
  platform: List[str] = Field(
  ...,
  description='Name of the client platform (e.g. Grasshopper, Revit, etc). The '
@@ -43,11 +44,20 @@ class _InputAliasBase(BaseModel):
  description='List of process actions to process the input or output value.'
  )
 
+ @property
+ def required(self):
+ if self.optional:
+ return False
+ elif self.default is not None:
+ return False
+ else:
+ return True
+
  def to_queenbee(self):
  """Convert this input to a Queenbee input alias."""
  func = _inputs_mapper[self.__class__.__name__]
  data = {
- 'required': True if self.default is None else False,
+ 'required': self.required,
  'name': self.name,
  'default': self.default,
  'description': self.description,

pollination_dsl/alias/outputs.py

@@ -49,22 +49,33 @@ class _OutputAliasBase(BaseModel):
  name: str = Field(...)
  annotations: Dict = None
  description: str = None
+ optional: bool = False
+
  platform: List[str] = Field(
  ...,
  description='Name of the client platform (e.g. Grasshopper, Revit, etc). The '
  'value can be any strings as long as it has been agreed between client-side '
  'developer and author of the recipe.'
  )
+
  handler: List[IOAliasHandler] = Field(
  ...,
  description='List of process actions to process the input or output value.'
  )
 
+ @property
+ def required(self):
+ if self.optional:
+ return False
+ else:
+ return True
+
  def to_queenbee(self):
  """Convert this output to a Queenbee DAG output."""
  func = _outputs_mapper[self.__class__.__name__]
  data = {
  'name': self.name,
+ 'required': self.required,
  'description': self.description,
  'annotations': self.annotations,
  'platform': self.platform,

pollination_dsl/dag/inputs.py

@@ -34,7 +34,7 @@ class _InputBase(BaseModel):
  default: Any = None
  spec: Dict = None
  alias: List[InputAliasTypes] = None
- optional: Any = None
+ optional: bool = False
 
  @validator('alias', always=True)
  def empty_list_alias(cls, v):

pollination_dsl/dag/outputs.py

@@ -50,7 +50,7 @@ class _OutputBase(BaseModel):
  annotations: Dict = None
  description: str = None
  alias: List[OutputAliasTypes] = None
- optional: Any = None
+ optional: bool = False
 
  @validator('source')
  def change_self_to_inputs(cls, v):

pollination_dsl/function/inputs.py

@@ -30,7 +30,7 @@ class _InputBase(BaseModel):
  description: Any = None
  default: str = None
  spec: Dict = None
- optional: Any = None
+ optional: bool = False
 
  @property
  def __decorator__(self) -> str:

pollination_dsl/function/outputs.py

@@ -32,7 +32,7 @@ class _OutputBase(BaseModel):
  path: str
  annotations: Dict = None
  description: str = None
- optional: Any = None
+ optional: bool = False
 
  @validator('path')
  def change_self_to_inputs(cls, v):