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[DOC] Fix example usage of get_context (plus a little more) #801

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Merged
merged 3 commits into from
May 26, 2025
Merged

[DOC] Fix example usage of get_context (plus a little more) #801

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edd8ea1
docs: fix incorrect usage example re get_context()
May 24, 2025
759f276
fix: fix problem with get_context example
May 24, 2025
f9a08e8
lint: removed unused import
May 24, 2025
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9 changes: 5 additions & 4 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -160,7 +160,7 @@ from dataclasses import dataclass

from fake_database import Database # Replace with your actual DB type

from mcp.server.fastmcp import Context, FastMCP
from mcp.server.fastmcp import FastMCP

# Create a named server
mcp = FastMCP("My App")
Expand Down Expand Up @@ -192,9 +192,10 @@ mcp = FastMCP("My App", lifespan=app_lifespan)

# Access type-safe lifespan context in tools
@mcp.tool()
def query_db(ctx: Context) -> str:
def query_db() -> str:
"""Tool that uses initialized resources"""
db = ctx.request_context.lifespan_context.db
ctx = mcp.get_context()
db = ctx.request_context.lifespan_context["db"]
return db.query()
```

Expand Down Expand Up @@ -631,7 +632,7 @@ server = Server("example-server", lifespan=server_lifespan)
# Access lifespan context in handlers
@server.call_tool()
async def query_db(name: str, arguments: dict) -> list:
ctx = server.get_context()
ctx = server.request_context
db = ctx.lifespan_context["db"]
return await db.query(arguments["query"])
```
Expand Down
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