tables_db_create_line_column
Add a geographic line column to store coordinate paths in Appwrite database tables for spatial data management.
Instructions
Create a geometric line column.
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| database_id | Yes | Database ID. | |
| table_id | Yes | Table ID. You can create a new table using the TablesDB service [server integration](https://appwrite.io/docs/references/cloud/server-dart/tablesDB#createTable). | |
| key | Yes | Column Key. | |
| required | Yes | Is column required? | |
| default | No | Default value for column when not provided, two-dimensional array of coordinate pairs, [[longitude, latitude], [longitude, latitude], …], listing the vertices of the line in order. Cannot be set when column is required. |
Implementation Reference
- Generic handler for all tools, including 'tables_db_create_line_column'. Retrieves the tool info from registry, binds the arguments, calls the underlying Appwrite SDK method (TablesDB.create_line_column), and formats the result.@server.call_tool() async def handle_call_tool( name: str, arguments: dict | None ) -> list[types.TextContent | types.ImageContent | types.EmbeddedResource]: try: tool_info = tools_manager.get_tool(name) if not tool_info: raise McpError(f"Tool {name} not found") bound_method = tool_info["function"] result = bound_method(**(arguments or {})) if hasattr(result, 'to_dict'): result_dict = result.to_dict() return [types.TextContent(type="text", text=str(result_dict))] return [types.TextContent(type="text", text=str(result))] except AppwriteException as e: return [types.TextContent(type="text", text=f"Appwrite Error: {str(e)}")] except Exception as e: return [types.TextContent(type="text", text=f"Error: {str(e)}")]
- Dynamically generates tool definitions including schema by introspecting methods on the TablesDB service instance. For 'tables_db_create_line_column', it uses the 'create_line_column' method's signature, docstring, and type hints.def list_tools(self) -> Dict[str, Dict]: """Lists all available tools for this service""" tools = {} for name, func in inspect.getmembers(self.service, predicate=inspect.ismethod): if name.startswith('_'): # Skip private methods continue original_func = func.__func__ # Skip if not from the service's module if original_func.__module__ != self.service.__class__.__module__: continue # Get the overridden name if it exists tool_name = self._method_name_overrides.get(name, f"{self.service_name}_{name}") docstring = parse(original_func.__doc__) signature = inspect.signature(original_func) type_hints = get_type_hints(original_func) properties = {} required = [] for param_name, param in signature.parameters.items(): if param_name == 'self': continue param_type = type_hints.get(param_name, str) properties[param_name] = self.python_type_to_json_schema(param_type) properties[param_name]["description"] = f"Parameter '{param_name}'" for doc_param in docstring.params: if doc_param.arg_name == param_name: properties[param_name]["description"] = doc_param.description if param.default is param.empty: required.append(param_name) tool_definition = Tool( name=tool_name, description=f"{docstring.short_description or "No description available"}", inputSchema={ "type": "object", "properties": properties, "required": required } ) tools[tool_name] = { "definition": tool_definition, "function": func } return tools
- src/mcp_server_appwrite/server.py:70-71 (registration)Registers the TablesDB Appwrite service under the name 'tables_db', enabling dynamic tool generation for its methods, including 'tables_db_create_line_column'.if args.tables_db: tools_manager.register_service(Service(TablesDB(client), "tables_db"))
- src/mcp_server_appwrite/server.py:94-94 (registration)Default registration of the TablesDB service if no specific services are enabled.tools_manager.register_service(Service(TablesDB(client), "tables_db"))
- Imports the TablesDB class from Appwrite SDK, which provides the underlying methods proxied as MCP tools.from appwrite.services.tables_db import TablesDB