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Tag: pydantic

override field alias from subclass in Pydantic

I have 2 models, 1 subclassing the other: How can I accomplish this ? Answer You don’t need to subclass to accomplish what you want (unless your need is more complex than your example). For import: Add the Config option to allow_population_by_field_name so you can add the data with names or firstnames For export: Add by_alias=True to the dict() method

How to reuse a root_validator in Pydantic?

The Pydantic docs have an example of reusing a validator: https://pydantic-docs.helpmanual.io/usage/validators/#reuse-validators Is it possible to reuse a root validator? Answer Yes, it is possible and the API is very similiar Example: It is also possible to parameterize the validator like in this example https://github.com/samuelcolvin/pydantic/discussions/2938

Validation error while inputting a record into Postgres

I have created a table using the following query, Following is my models.py Following is my schema.py I use the following code to create an user, The problem is that I’m getting the following error, raise ValidationError(errors, field.type_) pydantic.error_wrappers.ValidationError: 1 validation error for AccountsInfo response -> created_on str type expected (type=type_error.str) what am I missing? Answer raise ValidationError(errors, field.type_) pydantic.error_wrappers.ValidationError:

How to disable schema checking in FastAPI?

I am migrating a service from Flask to FastAPI and using Pydantic models to generate the documentation. However, I’m a little unsure about the schema check. I’m afraid there will be some unexpected data (like a different field format) and it will return an error. In the Pydantic documentation there are ways to create a model without checking the schema:

Pydantic enum field does not get converted to string

I am trying to restrict one field in a class to an enum. However, when I try to get a dictionary out of class, it doesn’t get converted to string. Instead it retains the enum. I checked pydantic documentation, but couldn’t find anything relevant to my problem. This code is representative of what I actually need. I’m trying to get

asyncpg.exceptions.DataError: invalid input for query argument $1: 217027642536 (value out of int32 range)

I’m working on a project that uses FastAPI alongside Pydantic and SQLAlchemy. I’m also using encode/databases to manage database connections. But for some weird reason, I get asyncpg.exceptions.DataError: invalid input for query argument $1: 217027642536 (value out of int32 range) anytime I try saving to the database. Here’s what my code looks like: database.py database_manager.py endpoints.py models.py services.py I can’t

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