CODEWITHSUNDEEP
pythonfastapipydantic
Magno
Magno

Reputation: 3

Organize data with pydantic

I'm using fastapi to create an api, and I need to adjust the output object in pydantic but I'm not getting it. My code:

class Obj1(BaseModel):
    d:str = None
    e:str = None

class Obj(BaseModel):
    a:int = None
    b:str = None
    c:Obj1 = None

data = {'a': 1, 'b': 'b', 'd': 'd', 'e':'e'}

obj = Obj(**data)

In this way, I lose the values of d and e.

Obj(a=1, b='b', c=None)

The expected value would be

Obj(a=1, b='b', c=Obj1(d='d', e='e'))

Is there any method in pydantic that I can use to make the correct transformation of the data? I tried to use root_validator to set the object's value but had errors. Tanks.

Upvotes: 0

Views: 471

Answers (1)

alex_noname
alex_noname

Reputation: 32233

The given data dictionary does not match the defined models, this one will match:

data = {'a': 1, 'b': 'b', 'c': {'d': 'd', 'e': 'e'}}

By default pydantic ignores extra attributes, and you could simply do that:

obj = Obj(**data, c=Obj1(**data))

Upvotes: 1

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