Quantifier Operators

Quantifier operators let you inspect array values and counts without iterating manually.

Any

Use any to check if at least one element in an array satisfies a condition:

any __tags__ of **Article** is equal to "featured"

Interactive Example

Reset

Policy Rule

A **Order** needs review if any __items__ of **Order** is empty.

Test Data (JSON)

{ "Order": { "items": ["apple", "", "banana"] } }

▶ Run

any over an empty array always returns false.

All

Use all to check that every element in an array satisfies a condition:

all __scores__ of **Test** is greater than 50

Interactive Example

Reset

Policy Rule

A **Submission** is approved if all __scores__ of **Submission** is greater than 60.

Test Data (JSON)

{ "Submission": { "scores": [75, 82, 91] } }

▶ Run

all over an empty array always returns true.

Number Of

Use the number of to count the elements in an array and compare against a value:

the number of __items__ of **Cart** is greater than 0

Interactive Example

Reset

Policy Rule

A **Cart** qualifies for bulk discount if the number of __items__ of **Cart** is at least 5.

Test Data (JSON)

{ "Cart": { "items": ["a", "b", "c", "d", "e"] } }

▶ Run

You can use number of without the article the:

number of __errors__ of **Report** is equal to 0

Length Of

Use the length of to get the character count of a string (or element count of an array) and compare it:

the length of __username__ of **User** is greater than 3

Interactive Example

Reset

Policy Rule

A **User** has a valid username if the length of __username__ of **User** is at least 4 and the length of __username__ of **User** is no more than 20.

Test Data (JSON)

{ "User": { "username": "alice" } }

▶ Run

Works on arrays too — returns the array length:

Interactive Example

Reset

Policy Rule

A **Team** has enough members if the length of __members__ of **Team** is at least 3.

Test Data (JSON)

{ "Team": { "members": ["alice", "bob", "charlie"] } }

▶ Run

Sum Of

Use the sum of to add up all numeric values in an array:

the sum of __prices__ of **Order** is greater than 100

Interactive Example

Reset

Policy Rule

A **Order** qualifies for free shipping if the sum of __prices__ of **Order** is at least 50.

Test Data (JSON)

{ "Order": { "prices": [15, 25, 20] } }

▶ Run

Average Of

Use the average of (or avg of / mean of) to calculate the mean of numeric values:

the average of __scores__ of **Student** is at least 70

Interactive Example

Reset

Policy Rule

A **Student** passes the course if the average of __scores__ of **Student** is at least 60.

Test Data (JSON)

{ "Student": { "scores": [85, 90, 55, 70] } }

▶ Run

Min Of

Use the min of (or minimum of / smallest of) to find the smallest value in an array:

the min of __bids__ of **Auction** is greater than 10

Interactive Example

Reset

Policy Rule

A **Auction** has valid bids if the min of __bids__ of **Auction** is greater than 0.

Test Data (JSON)

{ "Auction": { "bids": [5, 12, 3, 20] } }

▶ Run

Max Of

Use the max of (or maximum of / largest of) to find the largest value in an array:

the max of __temperatures__ of **Report** is less than 100

Interactive Example

Reset

Policy Rule

A **Report** is within safe limits if the max of __temperatures__ of **Report** is less than 100.

Test Data (JSON)

{ "Report": { "temperatures": [72, 85, 91, 68] } }

▶ Run

Compound Predicates

When array elements are objects, you can check multiple properties of each element using where (or satisfies):

any __items__ of **Order**
where (its __status__ is equal to "shipped"
and its __quantity__ is greater than 0)

Each sub-condition starts with its to reference the current element. See Compound Predicates for full details.

Dynamic Key Lookup

any and all can iterate over arrays produced by dynamic key lookups:

any __user__ of **request** looked up in **user_roles** looked up in **role_grants**
where (its __action__ is equal to the __action__ of the **request**)

This resolves a chain of data lookups before iterating. See Platform RBAC for the current platform access model.

Summary

Operator	What it checks
any __prop__ of **Obj** ...	At least one array element matches
all __prop__ of **Obj** ...	Every array element matches
any ... where (its __x__ op val and ...)	Element matches compound condition
any ... looked up in **Target** ...	Iterate over dynamically resolved array
the number of __prop__ of **Obj** ...	Count of array elements
the length of __prop__ of **Obj** ...	Character length (string) or element count (array)
the sum of __prop__ of **Obj** ...	Sum of numeric array elements
the average of __prop__ of **Obj** ...	Mean of numeric array elements
the min of __prop__ of **Obj** ...	Smallest numeric array element
the max of __prop__ of **Obj** ...	Largest numeric array element