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 F…
Tag: pydantic
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 htt…
How to display list data from SqlAlchemy Query using fastAPI
So, I have been trying to learn Python Full-Stack web development using fastAPI. Most of my website works properly but I am having trouble with sending the list of Query using FASTAPI. I get this error. This is my FastAPI router code. This is the function that returns the list of all comics stored in the data…
How to inflect from snake case to camel case post the pydantic schema validations
I can able to find a way to convert camelcase type based request body to snake case one by using Alias Generator, But for my response, I again want to inflect snake case type to camel case type post to the schema validation. Is there any way I can achieve this? Example: I do have a python dict as below,
Writing a pydantic object into a sqlalchemy json column
I’m looking for a way to have a pydantic object stored in a sqlalchemy json column. My attempts so far are being tripped up by a datetime field in the pydantic object. I feel like I’m missing something obvious. My first attempt was to simply serialise the result of .dict(). But this doesn’t …
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 fo…
How to use values from list to validate some calculations in pydantic BaseModel?
I’m using Pydantic root_validator to perform some calculations in my model: some data when run i get : 0.0, O.OO Iwant 220 How to make this function return the correct values? Answer I do not know if this is good why , but i get what i want
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 ther…
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…
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 sa…