Use Replacement Syntax

General: Using a ! after the $ prevents the variable from being printed if it's empty.

In the templates and the JQL, you can use the following objects:

Object	Usage
`$issue`	`$issue.summary` `$issue.description` `$issue.getReporterUser().getDisplayName()` `$issue.getFixVersions().iterator().next()` `$issue.getIssueTypeObject().getName()`
`$customfield_10500 (all customfields)`	`$issue.getCustomFieldValue($customfield_10500)` `$issue.getCustomFieldValue($customfield_10200).getDisplayName()`
`$fieldHelper`	`$fieldHelper.getValueAsString("components")` `$fieldHelper.getValueAsString("fixVersions")` `$fieldHelper.getValueAsString("customfield_10200")` `$fieldHelper.getDateOnlyAsString($issue.created)` `$fieldHelper.getDateWithFormat($issue.created, "yyMMdd")` `$fieldHelper.getDateTimeAsString($issue.getCustomFieldValue($customfield_10500))`
`$customFieldManager`
`$stringUtils`
`$textUtils`

How to get the values of standard fields:

Field	Usage
affectedVersions	`$!fieldHelper.getValueAsString("affectedVersions")`
assignee	`$!fieldHelper.getValueAsString("assignee")`
components	`$!fieldHelper.getValueAsString("components")`
created	`$!fieldHelper.getValueAsString("created")`
creator	`$!fieldHelper.getValueAsString("creator")`
description	`$!fieldHelper.getValueAsString("description")`
dueDate	`$!fieldHelper.getValueAsString("dueDate")`
environment	`$!fieldHelper.getValueAsString("environment")`
estimate	`$!fieldHelper.getValueAsString("estimate")`
fixVersions	`$!fieldHelper.getValueAsString("fixVersions")`
id	`$!fieldHelper.getValueAsString("id")`
issueType	`$!fieldHelper.getValueAsString("issueType")`
key	`$!fieldHelper.getValueAsString("key")`
labels	`$!fieldHelper.getValueAsString("labels")`
originalEstimate	`$!fieldHelper.getValueAsString("originalEstimate")`
priority	`$!fieldHelper.getValueAsString("priority")`
project	`$!fieldHelper.getValueAsString("project")`
reporter	`$!fieldHelper.getValueAsString("reporter")`
resolution	`$!fieldHelper.getValueAsString("resolution")`
resolutionDate	`$!fieldHelper.getValueAsString("resolutionDate")`
securityLevel	`$!fieldHelper.getValueAsString("securityLevel")`
status	`$!fieldHelper.getValueAsString("status")`
summary	`$!fieldHelper.getValueAsString("summary")`
timeSpent	`$!fieldHelper.getValueAsString("timeSpent")`
updated	`$!fieldHelper.getValueAsString("updated")`
votes	`$!fieldHelper.getValueAsString("votes")`
watches	`$!fieldHelper.getValueAsString("watches")`

In the JQL query, you can use variables in replacement syntax, e.g. $!fieldHelper.getValueAsString("components").

Using this syntax, you can also query for metadata provided by the Project Metadata app.