The logical parsing mode is used to construct logical expressions.

To construct these logical expressions, you can combine different elements, such as field codes, JWT expression parser functions and operators. The result must always return one of two distinct BOOLEANvalues: true or false

The main JWT features where you will be using the logical parsing mode are:

Example expressions

Parser expressionDescription
3 < 5

This example returns:

true

3 > 5

This example returns:

false

Expressions can be combined or linked using operators to construct complex logical comparisons.

Parser expressionDescription
3 < 5 AND 7 > 5

This example returns:

true

%{issue.assignee} = %{issue.reporter}

This example returns:

true if the current assignee has also reported the issue, false otherwise

Additional examples
Parser expressionDescription
false
Simply returns false. You can use this expression for "switching off" a specific post function.
{parent.votes} > 5

A numerical comparison which returns true if the parent issue has more than 5 votes.

%{issue.assignee} = %{issue.project.lead} and %{issue.issueType} = "Bug"
(%{issue.assignee} = %{issue.project.lead}) and (%{issue.issueType} = "Bug")

A logical conjunction which takes two comparisons as operands.

It returns true when the assignee of the issue is the project lead and if it's a Bug.

The second expression has the same meaning but due to use of brackets may be more readable.

%{issue.assignee} = null

Returns true if the issue does not have an assignee. This expression uses the null value as an operator.

%{issue.priority} IN ["Blocker", "Critical"]

%{issue.priority} = "Blocker" OR %{issue.priority} = "Critical"

Returns true if the Priority has the value "Blocker" or "Critical". The first expressions uses a list whereas the second one uses single comparisons connected via the logical operator OR.

%{issue.issueType} = "Bug" IMPLIES %{issue.versions} != null

Returns true if Affects version/s is set whenever the issue type equals "Bug".

%{issue.priority} IN ["Blocker", "Critical", "Major"] IMPLIES (%{issue.assignee} != null AND %{issue.duedate} != null)

Returns true if Priority is "Blocker", "Critical" or "Major", the issue is assigned and Due date is set.

%{issue.labels} ~ ["Blocker", "Critical", "Major"]

Returns true if Labels (which is a field holding a TEXT LIST) contains "Blocker", "Critical" or "Major".

Comparison operators

The operators, their meaning and the applicable data types you can use them with are listed below.

A comparison always returns a BOOLEAN value.

Overview of all case-sensitive comparison operators


All operators respect the case of the characters.


OperatorMeaningExamples (all examples return true)
= equal to
1=1
true = true
[1, 2, 3] = [1, 2, 3]
["blue", "red", "green"] = ["blue", "red", "green"]

When working with Lists, each elements' existence and its order are being evaluated.

!= not equal to
0 != 1
"HELLO" != "Hello"
%{issue.description} != "Hello"
true != false
[1, 2, 3] != [1, 3, 2]
["blue", "red", "green"] != ["blue", "green", "red"]

When working with Lists, each elements' existence and its order are being evaluated.

< less than
1 < 2
"abc" < "bbc"
"abc" < "abcd"
> greater than
2 > 1
"bbc" > "abc"
"abcd" > "abc"
<= less than or equal to
3 <= 3
>= greater than or equal to
"Hello world! Hello *" >= "Hello world"
~ contains
"Hello world!" ~ "world" #true. The text "world" is contained in the first text.
%{issue.components.leads} ~ %{system.currentUser} #checks whether "Component leads" contains the "Current user".
[1, 2, 3, 2, 2, 4] ~ [2, 1, 2] #true
["blue", "red", "green", "red", "white", "red"] ~ ["red", "green", "red"] #true
["green", "red"] ~ ["red", "green", "red"] #false
!~ does not contain
"world" !~ "Hello world!" #false. The text "world" is contained in the first text.
%{issue.fixVersions} !~ %{issue.versions} #false if all "Affects version/s" are also selected as "Fix version/s".
[1, 2, 3, 2, 2, 4] !~ [2, 1, 1, 4] #true
["blue", "red", "green", "red", "red"] !~ ["red", "green", "green", "red"] #true
in is contained in
"world" in "Hello world!" #true. The text "world" is contained in the first text.
%{system.currentUser} in %{issue.components.leads} #true if current user is a component lead of any of the issue's components 
[1, 1, 2] in [2, 1, 1, 1, 4] #true
["blue", "red", "red"] in ["red", "green", "blue", "red", "red"] #true
2 in [1, 2, 3] #true
"blue" in ["red, "blue", "white"] #true
not in is not contained in
"Hello world!" not in "world" #true
%{issue.versions} not in %{issue.fixVersions} #false if all "Affects version/s" are also selected as "Fix version/s".
[1, 1, 2, 2] not in [2, 1, 1, 1, 4] #true
["blue", "red", "red", "blue"] not in ["red", "blue", "red", "red"] #true 
5 not in [1, 2, 3, 3, 4] #true
"orange" not in ["blue", "red", "white"] #true
any in any element is in
%{issue.versions} any in %{issue.fixVersions} # true if any selected "Affects version/s" has also been selected as "Fix version/s". 
[1, 3] any in [3, 4, 5] #true
["blue", "white"] any in ["black", "white", "green"] #true
none in no single element is in
%{issue.versions} none in %{issue.fixVersions} #true if no selected "Affects version/s" has also been selected as "Fix version/s". 
[1, 2] none in [3, 4, 5] #true
["blue", "red"] none in ["black", "white", "green"] #true

When comparing lists, the exact number of occurence (cardinality) per element must match. 

Parser expressionOutputDescription
["blue", "red", "green", "red", "white", "red"] ~ ["red", "green", "red"]
true This expression returns true , since the element (text) red appears at least twice in the first list and the element (text) green occurs at least once in the first list.
["green", "red"] ~ ["red", "green", "red"]
false This expression returns false , since the element (text) red does not appear twice in the first list. 
Overview of all case ignoring comparison operators

The following comparison operators can be used with   TEXT and TEXT LIST   data types .

All operators ignore the case of the characters.

OperatorMeaningExamples (all examples return true)
=~ equal to

"HELLO" =~ "Hello" #true
"up" =~ "UP" #true
["blue", "red", "green"] =~ ["Blue", "RED", "Green"] #true
!=~ not equal to

" HELLO" !=~ "Hello" #false, since there is a whitespace in the first text
"up" !=~ "down" #true
("up" !=~ "UP") #false 
["blue", "red"] !=~ ["Blue", "green"] #true
["blue", "red"] !=~ ["Red", "BLUE"] #true
["blue", "red", "green"] !=~ ["Blue", "RED", "Green"] #false
~~ contains

"Hello World!" ~~ "world" #true, checks whether a text contains a substring. 
"A small step for a man" ~~ "STEP" #true
["one", "two", "three"] ~~ ["TWO", "One"] #true, checks whether a text list contains all the elements of another text list.
!~~ does not contain

"Hello World!" !~~ "bye" #true, checks whether a text does not contain a substring. 
"A small step for a man" !~~ "big" #true
["one", "two", "three"] !~~ ["Four"] #true, checks whether a text list does not contain a single element of another text list. 
(["one", "two", "three"] !~~ ["TWO"]) = false
in~ is contained in

"world" in~ "Hello World!" #true, checks whether a substring is contained in another text. 
"STEP" in~ "A small step for a man" #true 
["TWO", "One"] in~ ["one", "two", "three"] #true, checks whether all the elements of a text list are contained in another text list.
not in~ is not contained in

"bye" not in~ "Hello World!" #true, checks whether a substring is not contained in another text. 
"big" not in~ "A small step for a man" #true
["Four"] not in~ ["one", "two", "three"] #true, checks whether any of the elements of a text list are not contained in another text list. 
["TWO"] not in~ ["one", "two", "three"] #false
any in~ any element is in

["blue", "violet"] any in~ ["Blue", "Red", "Green"] #true
["Five", "One"] any in~ ["FOUR", "FIVE", "SIX"]"bye" #true
none in~ no single element is in

["Orange"] none in~ ["red", "blue", "green"] #true, checks whether none of the elements of a text list are not contained in another text list. 
["orange"] none in~ ["Red", "Orange"] #false
Applicable data types

Below you find a comprehensive matrix of all operators and applicable data types .

Comparison Operator

BOOLEAN

NUMBER

TEXT

NUMBER LIST

TEXT LIST

ISSUE LIST

= (tick)(tick)(tick)(tick)(tick)(tick)
!= (tick)(tick)(tick)(tick)(tick)(tick)
< -(tick)(tick)---
> -(tick)(tick)---
<= -(tick)(tick)---
>= -(tick)(tick)---
~ --(tick)(tick)(tick)(tick)
!~ --(tick)(tick)(tick)(tick)
in --(tick)(tick)(tick)(tick)
not in --(tick)(tick)(tick)(tick)
any in ---(tick)(tick)(tick)
none in ---(tick)(tick)(tick)
=~ --(tick)-(tick)-
!=~ --(tick)-(tick)-
~~ --(tick)-(tick)-
!~~ --(tick)-(tick)-
in~ --(tick)-(tick)-
not in~ --(tick)-(tick)-
any in~ ----(tick)-
none in~ ----(tick)-

Please be aware the both operands of the respective comparison must have the same data type. The only exceptions are the following:

  • Automatic casting from NUMBER to TEXTWhenever you write a numeric term at the right-hand side of a comparison operator like =, and the left-hand side is occupied by a text term, the parser will automatically transform the right-hand side term into a text (e.g. "30" = 30 will be interpreted the same way as "30" = "30")
  • Single values as operand in list operations: Operators ~, !~, in  and not in can be used for checking a single element (NUMBER or TEXT) against a  NUMBER LIST  or a  TEXT LIST
  • Comparison with the null value: A field which is not set or an empty text is interpreted as null. A NUMBER field, which doesn't contain a number, is also interpreted as null .
Things to remember
RememberExamples

Operators ~, !~, in  and not in can be used for checking a single element (NUMBER or TEXT) against a  NUMBER LIST  or a  TEXT LIST

1 in [1, 2, 3] 
["blue", "red"] ~ "blue"
Operators ~, !~, in  and  not in when used with a text are useful to look for substrings in another string.
"I love coding" ~ "love"
"I don't like Mondays" !~ "Fridays"
"love" in "I love coding"
"Fridays" not in "I don't like Mondays"
Operators  ~, !~, in  and  not in  respect cardinality, i.e., container list must have at least the same number of elements as contained list.
[1, 1] in [1, 1, 1]
[1, 1] not in [1, 2, 3]
Operators = and != , when used for comparing lists, require to have the same elements, with the same cardinality and the same order.
[1, 2, 3] = [1, 2, 3]
[4, 5, 6] != [4, 6, 5]

Operators <, >, <= and >= work according to lexicographical order when comparing text.

1 < 2
"abc" < "bbc"
"abcd" > "abc"

Logical operators

The table below lists all logical operators that can be used for linking logical terms in an expression.

Logical operators take logical terms (which return BOOLEAN values) as operands and can thus be built using:

  • a boolean value
  • JWT expression parser function returning a boolean value
  • a comparison
  • a logical term enclosed by brackets ()
  • two logical terms connected with a logical operator, where boolean literals and comparisons themselves are logical terms.

Logical operators can only be used in logical expressions in the Logical mode or in combination with the conditional operator.

Overview of all logical operators


Operator

Meaning

Precedence

NOT or  ! logical negation1 (highest)
AND  or  & logical conjunction2
OR or  | logical disjunction3
XOR exclusive or, i.e.,  a XOR b   is equivalent to   a AND !b OR !a AND b 3
IMPLIES or  IMP logical implication, i.e.,  a IMPLIES b   is equivalent to  !a OR b 4
XNOR  or  EQV logical equivalence, i.e.,  a EQV b   is equivalent to  a IMPLIES b AND b IMPLIES a 4 (lowest)

A single logical term can be enclosed by brackets () in order to increase the readability of the expressions or to define a precedence which differs from the given one. 

Logical operators can also be written in lower case (e.g. and , or )

Conditional operator

The conditional operator  ?  :  is a powerful operator to construct conditional expressions.

It basically allows you to construct the following expression: IF logical_expression  true THEN  term_1   ELSE  term_2.

<logical_expression> ? <term_1> : <term_2> 

The conditional operator is extremely helpful when being used in calculated fields.

Examples of using the conditional operator
ExpressionDescription
%{issue.priority} = "Highest" ? "Please have a look at this issue immediately" : "No stress, come back later" 

IF the priority of an issue is Blocker,

THEN this function will return  "Please have a look at this issue immediately"

ELSE it will return  "No stress, come back later".

{issue.duedate} != null ? ({...duedate} - {...currentDateTime}) / {HOUR} : 0

IF an issue does have a due date set (due date is not null),

THEN this function will return the number of hours from the current date-time to the due date 

ELSE it will return  0 .

%{issue.somefield} = "Red" ? "Color" : "No color" 

IF a custom field (e.g. a select list) has a value of Red,

THEN this function will return "Color"

ELSE it will return "No color".

timePart({...currentDateTime}, LOCAL) > 21:00 AND timePart({...currentDateTime}, LOCAL) < 7:00 ? "Night" : "Day"

IF the current time is between 21:00 and 7:00

THEN this function will return "Night" ,

ELSE it will return "Day".


If you still have questions, feel free to refer to our support team.