--- name: database-skill description: Configure and operate TinyDB for JSON-based document storage. Use when setting up databases, creating queries, or managing data persistence. allowed-tools: Write, Read, Bash --- # Database Skill ## Purpose Set up and manage TinyDB document database with proper configuration and query patterns. ## Instructions ### Database Setup ```python from tinydb import TinyDB, Query from tinydb.storages import JSONStorage from tinydb.middlewares import CachingMiddleware from pathlib import Path from typing import Optional, List class TodoDatabase: """TinyDB wrapper for todo task storage.""" def __init__(self, db_path: str = "todo_data.json"): """Initialize database with caching.""" self.db_path = Path(db_path) self.db = TinyDB( self.db_path, storage=CachingMiddleware(JSONStorage), indent=2, ensure_ascii=False ) self.tasks = self.db.table('tasks') self.query = Query() def close(self): """Close database connection.""" self.db.close() def __enter__(self): return self def __exit__(self, exc_type, exc_val, exc_tb): self.close() ``` ### ID Generation ```python def get_next_id(self) -> int: """Generate next unique ID.""" all_tasks = self.tasks.all() if not all_tasks: return 1 return max(task['id'] for task in all_tasks) + 1 ``` ### CRUD Operations ```python def insert(self, task: dict) -> int: """Insert a new task.""" task['id'] = self.get_next_id() doc_id = self.tasks.insert(task) return task['id'] def get(self, task_id: int) -> Optional[dict]: """Get task by ID.""" return self.tasks.get(self.query.id == task_id) def get_all(self) -> List[dict]: """Get all tasks.""" return self.tasks.all() def update(self, task_id: int, updates: dict) -> bool: """Update task by ID.""" result = self.tasks.update(updates, self.query.id == task_id) return len(result) > 0 def delete(self, task_id: int) -> bool: """Delete task by ID.""" result = self.tasks.remove(self.query.id == task_id) return len(result) > 0 ``` ### Query Patterns ```python # Simple equality tasks = db.tasks.search(db.query.priority == 'high') # Logical AND tasks = db.tasks.search( (db.query.priority == 'high') & (db.query.status == 'pending') ) # Logical OR tasks = db.tasks.search( (db.query.priority == 'high') | (db.query.priority == 'urgent') ) # NOT tasks = db.tasks.search(~(db.query.status == 'completed')) # Test function (for complex conditions) tasks = db.tasks.search( db.query.title.test(lambda t: 'keyword' in t.lower()) ) # Check if value in list tasks = db.tasks.search( db.query.tags.test(lambda tags: 'work' in tags) ) # Exists check tasks = db.tasks.search(db.query.due_date.exists()) # Comparison operators tasks = db.tasks.search(db.query.priority != 'low') ``` ## Full Database Class ```python class TodoDatabase: def __init__(self, db_path: str = "todo_data.json"): self.db = TinyDB( db_path, storage=CachingMiddleware(JSONStorage), indent=2 ) self.tasks = self.db.table('tasks') self.query = Query() def get_next_id(self) -> int: all_tasks = self.tasks.all() return max((t['id'] for t in all_tasks), default=0) + 1 def insert(self, task: dict) -> int: task['id'] = self.get_next_id() self.tasks.insert(task) return task['id'] def get(self, task_id: int) -> Optional[dict]: return self.tasks.get(self.query.id == task_id) def get_all(self) -> List[dict]: return self.tasks.all() def search(self, condition) -> List[dict]: return self.tasks.search(condition) def update(self, task_id: int, updates: dict) -> bool: return bool(self.tasks.update(updates, self.query.id == task_id)) def delete(self, task_id: int) -> bool: return bool(self.tasks.remove(self.query.id == task_id)) def clear(self): self.tasks.truncate() def close(self): self.db.close() ``` ## Best Practices - Use CachingMiddleware for better performance - Always handle database closing properly - Use context managers for automatic cleanup - Generate IDs automatically - Use Query objects for type-safe queries - Index frequently queried fields conceptually --- Source attribution: maneeshanif Original project: https://github.com/maneeshanif/cli-todo-app-speckit/blob/7b2179e8d3d079170e47fad50ae1bafb950dac5c/.claude/skills/database-skill/SKILL.md License: MIT License information: https://opensource.org/license/mit Original upstream instructions; downloaded from Dave AI. ## Upstream license notice MIT License Copyright (c) 2025 maneeshanif Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. # Dave AI resource metadata Creator / publisher: maneeshanif Original project: https://github.com/maneeshanif/cli-todo-app-speckit/blob/7b2179e8d3d079170e47fad50ae1bafb950dac5c/.claude/skills/database-skill/SKILL.md Attribution basis: Recovered original package and original project license at a pinned revision Fields of work: Development & Engineering Roles: Backend Developer, Data Engineer, Database Administrator Specialties: Cross Platform, Database Tools: Tinydb Country applicability: Country not specified Classification basis: Source catalog labels Instruction SHA-256: a7a53c938e505151ac91d030f5439dd1296b029ac6329450b9c749570a019df8 Metadata reviewed: 2026-10-27 This metadata supersedes earlier Dave AI catalog attribution. Original instruction and supporting files are preserved.