How to keep APIM SubscriptionName in the policy

Question

Hi, we want to keep APIM Subscription Name (the unique, immutable one, not display name) to the log by API policy for further analysis.

We find there are two types of Name on the UI.
The red one is what we want to keep in the log, for it's immutable, like primary key.

After some tests, we cannot find a way to store this red name in the API policy.

What we've done so far .

1. Use following code snippet in the API policy

new JProperty("SubscriptionName", context.Subscription.Name), ==> Display Name is stored

new JProperty("SubscriptionId", context.Subscription.Id) ==> Nothing stored, it's blank.

But the Name fetched is Display Name, and if using SubscriptionId, it's blank.

We hope to fetch the value like this, in the APIM > Logs .
(Though its field name here is ApimSubscriptionId)

Need your advice to know how we can make it in the API policy configuration.

Thank you

Answer 1

@Lily Thanks for reaching out. I see with context.Subscription.Id it retrieves name of the subscription and with context.Subscription.Name it retrieves display name of the subscription as shown below

  <inbound>
        <base />
        <set-variable name="subname" value="@(context.Subscription.Id)" />
        <set-variable name="subname" value="@(context.Subscription.Key)" />
        <set-variable name="subname" value="@(context.Subscription.Name)" />
    </inbound>

set-variable (0.008 ms)
{
    "message": "Expression was successfully evaluated.",
    "expression": "context.Subscription.Id",
    "value": "thisisname"
}
set-variable (0.012 ms)
{
    "message": "Context variable was successfully set.",
    "name": "subname",
    "value": "thisisname"
}
set-variable (0.003 ms)
{
    "message": "Expression was successfully evaluated.",
    "expression": "context.Subscription.Key",
    "value": "7e59xxxxxxxxxxxx9bf794b"
}
set-variable (0.002 ms)
{
    "message": "Context variable was successfully set.",
    "name": "subname",
    "value": "7e5xxxxxxxxxxxf794b"
}
set-variable (0.002 ms)
{
    "message": "Expression was successfully evaluated.",
    "expression": "context.Subscription.Name",
    "value": "thisisdispalyname"
}
set-variable (0.001 ms)
{
    "message": "Context variable was successfully set.",
    "name": "subname",
    "value": "thisisdispalyname"
}

do check and let me know incase of further queries, I would be happy to assist you.