fix: Resolve the error message

[shaohuzhang1]

fix: Resolve the error message --bug=1052045 --user=王孝刚 【应用】-应用中使用的函数被删除后，演示中提示函数库被删除，提示错误 https://www.tapd.cn/57709429/s/1651371

[shaohuzhang1]

There are no significant issues with the provided code snippet for ISubscription class. However, there's an inconsistency between the exception messages:

Exception Message Inconsistency:

-            raise Exception(_('The library has been deleted'))
+            raise Exception(_('The function has been deleted'))

Here, it looks like 'library' should be replaced with 'function' since you're dealing with function-related operations (FunctionLib). Adjusting this will ensure that the correct message is displayed.

Optimization Suggestion (optional):
If you want to make the check more efficient by filtering directly on a specific field when possible, consider changing:

f_lib = QuerySet(FunctionLib).filter(id=self.data.get('function_lib_id')).first()

to

f_lib = FunctionLib.objects.filter(pk=self.data['function_lib_id']).last()  # Assuming 'id' and 'pk' point to the same field

This approach assumes that FunctionLib.pk corresponds to the desired identifier field used in your database schema. Adjustments may need to be made if these fields differ or do not exist in your model.

These changes will improve readability and potentially performance based on the specifics of your database schema.

[f2c-ci-robot]

Adding the "do-not-merge/release-note-label-needed" label because no release-note block was detected, please follow our release note process to remove it.

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[f2c-ci-robot]

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