Fast API path parameters from Enum Class

Question

from enum import Enum
from fastapi import FastAPI
app = FastAPI()

Hi Defined a route and a Enum Class for the same but the Enum Class looks ugly.

class Subjects(str, Enum):
    path1="AcceptedEventRelation"
    path2="Account"
    path3="AccountChangeEvent"
    path4="AccountCleanInfo"
    path5="AccountContactRole"
    ...
    ...
    path100


@app.get("/subjects/{sobjectname:str}")
async def process_subjects(sobjectname:Subjects):
    endpoint_subjects = "/services/data/v49.0/sobjects"
    url_to_request = endpoint_subjects + "/" + sobjectname
    return {
        "subject" : sobjectname,
        "url_to_request": url_to_request
        }

Is there a better way to implement the Subjects Class. Thanks

The fact is that you need the LHS and RHS somewhere in your code, in some form. It can be a list, or dict, or in some other forms. — JPG
– JPG, Commented Aug 5, 2020 at 6:45
Please do not update the code in your question to incorporate feedback from answers, doing so goes against the Question + Answer style of Code Review. This is not a forum where you should keep the most updated version in your question. Please see what you may and may not do after receiving answers. — Mast
– Mast ♦, Commented Aug 5, 2020 at 9:13

JPG · Accepted Answer · 2020-08-06 06:23:49Z

1

The fact is that you need the LHS and RHS somewhere in your code, in some form. It can be a list, or dict, or in some other forms.

For example:

from enum import Enum
from fastapi import FastAPI

app = FastAPI()
some_dict = dict(
    path1="AcceptedEventRelation",
    path2="Account",
    path3="AccountChangeEvent",
    path4="AccountCleanInfo",
    path5="AccountContactRole"
)

Subjects = Enum('Subjects', some_dict)


@app.get("/subjects/{sobjectname}")
async def process_subjects(sobjectname: Subjects):
    endpoint_subjects = "/services/data/v49.0/sobjects"
    url_to_request = endpoint_subjects + "/" + sobjectname.value
    return {
        "subject": sobjectname,
        "url_to_request": url_to_request
    }

Here, the some_dict is the variable you need to generate, which also looks ugly if there is a 100 items in it as the way you feel for the Enum class.

edited Aug 6, 2020 at 6:23

answered Aug 5, 2020 at 6:50

JPG

1115 bronze badges

\$\begingroup\$ what is MyDynamicEnum referes to ? .. when I call the endpoint I get, TypeError: can only concatenate str (not "MyDynamicEnum") to str \$\endgroup\$

pyd
– pyd

2020-08-05 07:39:33 +00:00
Commented Aug 5, 2020 at 7:39
\$\begingroup\$ MyDynamicEnum is the class name \$\endgroup\$

JPG
– JPG

2020-08-05 07:47:28 +00:00
Commented Aug 5, 2020 at 7:47
\$\begingroup\$ ok but how canI fix the above error \$\endgroup\$

pyd
– pyd

2020-08-05 08:15:45 +00:00
Commented Aug 5, 2020 at 8:15
\$\begingroup\$ probably you should show the error traceback \$\endgroup\$

JPG
– JPG

2020-08-05 08:20:48 +00:00
Commented Aug 5, 2020 at 8:20
\$\begingroup\$ error traceback added in the question, pls check \$\endgroup\$

pyd
– pyd

2020-08-05 08:29:12 +00:00
Commented Aug 5, 2020 at 8:29

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