Merge pull request #49 from JaviCerveraIngram/CPS-16-null-fields

More fixes for null values.

Author: vgrebenschikov

connect/models/parameters.py

@@ -50,8 +50,8 @@ class Param(BaseModel):
     type = None  # type: str
     """ (str) Type of parameter. """
 
-    value = None  # type: str
-    """ (str) Value of parameter. """
+    value = None  # type: Optional[str]
+    """ (str|None) Value of parameter. """
 
     value_error = None  # type: Optional[str]
     """ (str|None) Error indicated for parameter. """

connect/models/schemas.py

@@ -334,7 +334,7 @@ class ParamSchema(BaseSchema):
     name = fields.Str()
     description = fields.Str()
     type = fields.Str()
-    value = fields.Str()
+    value = fields.Str(allow_none=True)
     value_error = fields.Str(allow_none=True)
     value_choice = fields.Str(many=True, allow_none=True)