Our JIRA system already has a few custom fields that contain references to ticket numbers that are external to JIRA (and on non-JIRA systems). These are mostly external support systems where the support team takes a call and if a bug ticket is needed, then a JIRA ticket is opened and the support ticket number is entered in the custom field.
The question is: Can JIRA be configured to prepend a fixed URL to these custom fields so that the support ticket number turns into a URL to take the user directly to the support ticket from JIRA?
The Import Id custom field for our instance is already set up like this to create a URL to our old ticket tracking system. This was done by adding a line "jira.importid.prefix=https\://myUrlHere" to our jira-config.properties file. Then just the old ticket number was entered into the custom field for Import Id. It would be ideal if I could specify a prefix like this for specific custom fields.
I also see that JIRA 5 added custom linking, so technically a plugin could be constructed to facilitate linking to the external systems. However, this is significantly higher effort than just prepending a custom field with the needed URL.
