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Tech review

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The JWT expression parser accepts the most common comparison operators as well as logical operators.

The main purpose of these operators is to construct complex logical comparisons by linking individual expressions.

Excerpt

Comparison operators

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

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type	tip

A comparison always returns a

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title	boolean

value.

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title	Overview of all case-sensitive comparison operators

Info
All operators respect the case of the characters.

Operator Meaning Examples (all examples return true)

=

equal to

Code Block

language	bash
linenumbers	true

1=1
true = true
[1, 2, 3] = [1, 2, 3]
["blue", "red", "green"] = ["blue", "red", "green"]

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

!=

not equal to

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language	bash
linenumbers	true

0 != 1
"HELLO" != "Hello"
%{issue.description} != "Hello"
true != false
[1, 2, 3] != [1, 3, 2]
["blue", "red", "green"] != ["blue", "green", "red"]

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type	info

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

<

less than

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language	bash
linenumbers	true

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

>

greater than

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language	bash
linenumbers	true

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

<=

less than or equal to

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language	bash
linenumbers	true

3 <= 3

>=

greater than or equal to

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language	bash
linenumbers	true

"Hello world! Hello *" >= "Hello world"

~

contains

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language	bash
linenumbers	true

"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

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language	bash
linenumbers	true

"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

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language	bash
linenumbers	true

"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

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language	bash
linenumbers	true

"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

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language	bash
linenumbers	true

%{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

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language	bash
linenumbers	true

%{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

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

Parser expression Output Description

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language	bash
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["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.

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language	bash
linenumbers	true

["green", "red"] ~ ["red", "green", "red"]

false

This expression returns false, since the element (text) red does not appear twice in the first list.

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title	Overview of all case ignoring comparison operators

Info

The following comparison operators can be used with

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title	text

and

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data types.

All operators ignore the case of the characters.

Operator Meaning Examples (all examples return true)

=~

equal to

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language	bash
linenumbers	true

"HELLO" =~ "Hello" #true
"up" =~ "UP" #true
["blue", "red", "green"] =~ ["Blue", "RED", "Green"] #true

!=~

not equal to

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language	bash
linenumbers	true

" 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

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language	bash
linenumbers	true

"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

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"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

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language	bash
linenumbers	true

"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

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language	bash
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"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

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language	bash
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["blue", "violet"] any in~ ["Blue", "Red", "Green"] #true
["Five", "One"] any in~ ["FOUR", "FIVE", "SIX"]"bye" #true

none in~

no single element is in

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language	bash
linenumbers	true

["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

UI Expand

title	Applicable data types

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

Comparison Operator

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title	BOOLEAN

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title	number

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title	Text

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title	number list

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title	text list

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title	issue list

=

!=

< - - - -

> - - - -

<= - - - -

>= - - - -

~ - -

!~ - -

in - -

not in - -

any in - - -

none in - - -

=~ - - - -

!=~ - - - -

~~ - - - -

!~~ - - - -

in~ - - - -

not in~ - - - -

any in~ - - - - -

none in~ - - - - -

Info

title	Things to be aware of

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
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to
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title text
: Whenever 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 (
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title number
or
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title text
) against a
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title number list
or a
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title text list
Comparison with the null value: A field which is not set or an empty text is interpreted as null. A
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title number
field, which doesn't contain a number, is also interpreted as null.

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title	Things to remember

Note

Remember Examples

Operators ~, !~, in and not in can be used for checking a single element (

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title	number

or
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title text
) against a

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title	number list

or a

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subtle	true
title	text list

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language	bash
linenumbers	true

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.

Code Block

language	bash
linenumbers	true

"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.

Code Block

language	bash
linenumbers	true

[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.

Code Block

language	bash
linenumbers	true

[1, 2, 3] = [1, 2, 3]
[4, 5, 6] != [4, 6, 5]

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

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language	bash
linenumbers	true

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

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subtle	true
title	boolean

values) as operands and can thus be built using:

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

UI Expand

title	Overview of all logical operators

Operator	Meaning	Precedence
`NOT` or `!`	logical negation	1 (highest)
`AND` or `&`	logical conjunction	2
`OR` or `\|`	logical disjunction	3
`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)

Info

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 (IF - THEN -ELSE)

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

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

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linenumbers	true

<boolean_expression> ? <term_1> : <term_2>

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type	tip

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

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title	Examples of using the conditional operator

Expression Description

Code Block

linenumbers	true

%{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".

Code Block

linenumbers	true

{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.

Code Block

linenumbers	true

%{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".

Code Block

linenumbers	true

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".

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Comparison operators

Logical operators

Conditional operator (IF - THEN -ELSE)