Questions tagged [pydantic-v2]
Pydantic V2 is a ground-up rewrite that offers many new features, performance improvements, and some breaking changes compared to Pydantic V1.
pydantic-v2
103
questions
0
votes
1
answer
35
views
Pydantic type conversion on assignment
I want to use Pydantic to convert a plaintext string password to a hashed value of type bytes on assignment using a specific hash function.
This is a minimal example, that shows my current (not-...
1
vote
1
answer
20
views
Why can't my FastAPI Router parse Pydantic's Enum type when I use Union params?
My Question
Here is the definition of my three Pydantic Model:
class SplitType(str, enum.Enum):
AUTO = "auto"
CUSTOM = "custom"
class DocumentConfigBase(BaseModel):
'''...
- 13
2
votes
1
answer
63
views
Set Pydantic BaseModel field type dynamically when instantiating an instance?
With Pydantic is it possible to build a model where the type of one of its fields is set via an argument when creating an instance?
For example:
class Animal(BaseModel):
name: str
class Dog(...
- 9,833
0
votes
1
answer
49
views
Is it possible to get a dict of fields with FieldInfo from the Pydantic Dataclass?
When creating classes by inheriting from BaseModel, I can use the model_fields property to get a dict of field names, and FieldInfo, but how can I do it if I use the Pydantic Dataclass decorator ...
- 961
0
votes
1
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43
views
Inverted Inheritance Structure in Pydantic
I know the normal way of creating Models in Pydantic is by Subclassing and adding fields for example like this:
from pydantic import BaseModel
class Base(BaseModel):
task_id: str
task_type: ...
- 17
0
votes
0
answers
39
views
Easier way to use ObjectID in MongoDB and pydantic
I have a custom pydantic model for MongoDb's ObjectID.
class PyObjectId(ObjectId):
@classmethod
def __get_pydantic_core_schema__(cls, _source_type: Any, _handler: Any) -> core_schema....
1
vote
2
answers
68
views
Date, Decimal not JSON serializable when encoding a Pydantic model to send in a POST via requests
I am writing a script to post data from an internal system to a third party web API. Our internal system uses data Models defined in Pydantic. I am trying to send data in one of these models to the ...
- 95
0
votes
1
answer
30
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Add Extra Field than Model in Pydantic which dependent in another field value
I am very new to fastAPI and I am trying to replicate Django models.SerializerMethodField() in pydantic base model, As in Django we can do
class A(serailizer.Serializers):
service = serializer....
- 35
0
votes
0
answers
23
views
Sphinx autodoc - Recursion error: maximum recursion depth exceeded
I am trying update our stravalib documentatio. We use Sphinx / pydata_sphinx_theme +
the native sphinx.autodoc extension combined with autodoc-pydantic for JSON representations.
Upon building the ...
- 717
1
vote
0
answers
39
views
Pydantic V2 model field_validation is not executed with Form Data in Fastapi 0.111.0
For Form data, I defined class as mentioned here https://stackoverflow.com/a/60670614/6189499. Using pydantic v2, pydantic model is defined as
@as_form
class Test(BaseModel):
param1: str
c: ...
- 976
2
votes
1
answer
54
views
Can't get validation to work for non-table SQLModel
I'm unable to get Pydantic validation working with and without SQLModel, and I'm unsure what I'm doing wrong. I'm unsure what I'm missing: the punchline is: validation doesn't seem to happen when I'd ...
- 21
0
votes
2
answers
64
views
Pydantic v2 to JSON Schema translation: How to suppress autogeneration of "title" annotation in v2?
I am using Pydantic 2.6.4 to generate JSON schemas. If I write an attribute in a Pydantic model that has no value for "title" in its FieldInfo, Pydantic will always autogenerate one from the ...
3
votes
1
answer
122
views
Supply only payload schema for FastAPI endpoint without actual validation by Pydantic
I need to supply only payload schema for API endpoint without any Pydantic validation. I'm using:
FastAPI==0.110.1
Pydantic v2
from typing import Literal, Annotated
import uvicorn
from fastapi ...
0
votes
2
answers
77
views
Validation error when sending a json with the required field
I'm new to Pydantic and I'm not understanding why this is failing when the JSON has the key.
from pydantic import BaseModel
class Event(BaseModel):
id: str
external_data = """
{
...
- 11
0
votes
0
answers
26
views
Pydantic @field_validator with mode before does not run
I'm using Pydantic v2 to validate. The raw input field rent_plan_id is a string, I want to convert it int before running any others validations. I configured as bellow but it seemed like the ...
