Fix for - Internal Server Error When Using Offset >= Total Organizations and Limit = 0 in Organization Discovery GET API

[kumardeepak5]

Purpose

Resolves wso2/product-is#21025

Goals

This PR removes the cyclic recursive call to the calculateOffsetForPreviousLink method as mentioned at wso2/product-is#21025 (comment).

Behavior After Fix:
Sample Request:

curl --location 'https://localhost:9443/api/server/v1/organizations/discovery?offset=10&limit=0' \
--header 'Accept: application/json' \
--header 'Authorization: Basic YWRtaW46YWRtaW4='

Sample Response

{
    "totalResults": 10,
    "startIndex": 11,
    "count": 0,
    "links": [
        {
            "href": "/api/server/v1/organizations/discovery?offset=10&limit=0",
            "rel": "previous"
        }
    ]
}

Related PRs

wso2/product-is#21263

[CLAassistant]

All committers have signed the CLA.

[AnuradhaSK]

Hi @kumardeepak5

Thank you for your contribution!

Here, in this case the expected behavior is not to have any previous or next links when the limit = 0. There is no point of giving any previous/next result set accessing URL with offset is 0.

We want to make this API behavior more or less similar to GET /scim2/Users?startIndex={index}&count={count}

Therefore, for this case expected behavior should be:

{
    "totalResults": 0,
    "startIndex": 11,
    "count": 0,
    "links": [
     
    ]
}

Would you be able to fix in that way?

[kumardeepak5]

Hi @AnuradhaSK

Therefore, for this case expected behavior should be:

{
    "totalResults": 0,
    "startIndex": 11,
    "count": 0,
    "links": [
     
    ]
}

Would you be able to fix in that way?

I have a question about the sample response above: Should the expected value for "totalResults" always be 0 when limit=0, or should it reflect the actual total results? I believe it should reflect the actual total results; could you please confirm?

[kumardeepak5]

Hi @AnuradhaSK

Therefore, for this case expected behavior should be:

{
    "totalResults": 0,
    "startIndex": 11,
    "count": 0,
    "links": [
     
    ]
}

Would you be able to fix in that way?

The requested changes implemented and below are sample request and response examples after the modifications.

curl --location 'https://localhost:9443/api/server/v1/organizations/discovery?offset=5&limit=0' \
--header 'Authorization: Basic <username:password>'

{
    "totalResults": 5,
    "startIndex": 6,
    "count": 0,
    "links": []
}

Please Review.

[kumardeepak5]

Hi @AnuradhaSK just a gentle reminder to review the changes.