Pydantic Encountering a 'value_error.url.invalid_port' error when validating a URL field in Pydantic.
Understanding Pydantic
Pydantic is a data validation and settings management library for Python, leveraging Python's type annotations. It is designed to provide data parsing and validation using Python's type hints, ensuring that the data conforms to the expected types and constraints. Pydantic is widely used for validating data in web applications, APIs, and other data-driven applications.
Identifying the Symptom
When working with Pydantic, you might encounter the error code value_error.url.invalid_port. This error typically arises when a URL field in your Pydantic model receives a URL with an invalid port number. The error message might look something like this:
pydantic.error_wrappers.ValidationError: 1 validation error for Model
url
invalid or missing port (type=value_error.url.invalid_port)
Understanding the Issue
The error value_error.url.invalid_port indicates that the URL provided to a Pydantic model contains a port number that is either invalid or not allowed. Ports must be integers between 1 and 65535. Any number outside this range is considered invalid. This error is raised during the validation process when Pydantic checks the URL field against the expected format and constraints.
Common Causes
- Typographical errors in the URL string.
- Using a port number outside the valid range (1-65535).
- Accidentally including non-numeric characters in the port section of the URL.
Steps to Fix the Issue
To resolve the value_error.url.invalid_port error, follow these steps:
Step 1: Verify the URL Format
Ensure that the URL you are providing is correctly formatted. Check for any typographical errors or misplaced characters. A valid URL should look like this:
http://example.com:8080/path
Step 2: Check the Port Number
Verify that the port number in the URL is within the valid range of 1 to 65535. If the port number is outside this range, adjust it to a valid number. For example, if your URL is:
http://example.com:70000/path
Change it to a valid port number:
http://example.com:8080/path
Step 3: Update Your Pydantic Model
Ensure that your Pydantic model is correctly defined to accept URLs. Here is an example of how you might define a model with a URL field:
from pydantic import BaseModel, HttpUrl
class MyModel(BaseModel):
url: HttpUrl
Additional Resources
For more information on Pydantic and URL validation, consider the following resources:
By following these steps, you should be able to resolve the value_error.url.invalid_port error and ensure that your URL fields are correctly validated in your Pydantic models.
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