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@app.patch("/ch01/account/profile/update/names/{username}")

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Sherwin John Tragura - Building Python Microservices with FastAPI Build secure, scalable, and structured Python microservices from design concepts to infrastructure-Packt Publishing - ebooks Account

@app.delete("/ch01/discussion/posts/remove/{username}") def delete_discussion

@app.patch("/ch01/account/profile/update/names/{username}")
def
update_profile_names
(username: str, id: UUID,
new_names: Dict[str, str]
):
if valid_users.get(username) == None:
return {"message": "user does not exist"}
elif new_names == None:
return {"message": "new names are required"}
else:
user = valid_users.get(username)
if user.id == id:
profile = valid_profiles[username]
profile.firstname = new_names['fname']
profile.lastname = new_names['lname']
profile.middle_initial = new_names['mi']
valid_profiles[username] = profile
return {"message": "successfully updated"}
else:
return {"message": "user does not exist"}
The last essential HTTP services that we included before building the application are the
DELETE
API
methods. We use these services to delete records or information given a unique identification, such as
username
and a hashed
id
. An example is the following
delete_post_discussion()
service
that allows a user to delete a posted discussion when given a username and the UUID (Universally
Unique Identifier) of the posted message:
@app.delete("/ch01/discussion/posts/remove/{username}")
def
delete_discussion
(username: str, id: UUID):
if valid_users.get(username) == None:
return {"message": "user does not exist"}
elif discussion_posts.get(id) == None:

Designing and implementing REST APIs
9
return {"message": "post does not exist"}
else:
del discussion_posts[id]
return {"message": "main post deleted"}
All path operations require a unique endpoint URL in the
str
format. A good practice is to start all
URLs with the same top-level base path, such as
/ch01
, and then differ when reaching their respective
subdirectories. After running the uvicorn server, we can check and validate whether all our URLs
are valid and running by accessing the documentation URL,
http://localhost:8000/docs
.
This path will show us a
OpenAPI
dashboard, as shown in Figure 1.2, listing all the API methods
created for the application. Discussions on the OpenAPI will be covered in Chapter 9, Utilizing Other
Advanced Features.
Figure 1.2 – A Swagger OpenAPI dashboard
After creating the endpoint services, let us scrutinize how FastAPI manages its incoming request
body and the outgoing response.

Setting Up FastAPI for Starters
10

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