Skills Development Pydantic Model Creation for Python

Pydantic Model Creation for Python

v20260928
pydantic-models-py
This skill assists developers in creating Pydantic models following a multi-model pattern for clean API contracts. It supports defining Base, Create, Update, Response, and InDB models with camelCase aliases and optional fields. Ideal for Python backend development, ensuring type safety and seamless integration with TypeScript types.
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Overview

Pydantic Models

Create Pydantic models following the multi-model pattern for clean API contracts.

Quick Start

Use the inline model patterns below and adapt class names and fields to the actual API contract. Inspect the installed Pydantic version before selecting configuration syntax; these fragments require the imports and application types shown by your project. Do not assume a standalone template file is bundled.

Multi-Model Pattern

Model Purpose
Base Common fields shared across models
Create Request body for creation (required fields)
Update Request body for updates (all optional)
Response API response with all fields
InDB Database document with doc_type

camelCase Aliases

class MyModel(BaseModel):
    workspace_id: str = Field(..., alias="workspaceId")
    created_at: datetime = Field(..., alias="createdAt")
    
    class Config:
        populate_by_name = True  # Accept both snake_case and camelCase

Optional Update Fields

class MyUpdate(BaseModel):
    """All fields optional for PATCH requests."""
    name: Optional[str] = Field(None, min_length=1)
    description: Optional[str] = None

Database Document

class MyInDB(MyResponse):
    """Adds doc_type for Cosmos DB queries."""
    doc_type: str = "my_resource"

Integration Steps

  1. Create models in src/backend/app/models/
  2. Export from src/backend/app/models/__init__.py
  3. Add corresponding TypeScript types

When to Use

This skill is applicable to execute the workflow or actions described in the overview.

Limitations

  • Use this skill only when the task clearly matches the scope described above.
  • Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
  • Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.
Info
Category Development
Name pydantic-models-py
Version v20260928
Size 2.09KB
Updated At 2026-09-28
Language