List Operators

List operators check whether a value exists in a set or whether a collection contains a value.

Is In

Check if a value is one of a set of allowed values:

__role__ of **User** is in ["admin", "moderator", "editor"]

Interactive Example

Reset

Policy Rule

A **User** has edit access if __role__ of **User** is in ["admin", "moderator", "editor"].

Test Data (JSON)

{ "User": { "role": "moderator" } }

▶ Run

Works with numbers too:

Interactive Example

Reset

Policy Rule

A **Product** is featured if __category_id__ of **Product** is in [1, 5, 12, 20].

Test Data (JSON)

{ "Product": { "category_id": 5 } }

▶ Run

Is Not In

Check if a value is not in a set (blocklist):

__status__ of **User** is not in ["banned", "suspended", "deleted"]

Interactive Example

Reset

Policy Rule

A **User** is allowed if __status__ of **User** is not in ["banned", "suspended", "deleted"].

Test Data (JSON)

{ "User": { "status": "active" } }

▶ Run

Contains

Check if a string or collection contains a value:

__tags__ of **Article** contains "featured"

Interactive Example

Reset

Policy Rule

A **Article** is highlighted if __title__ of **Article** contains "breaking".

Test Data (JSON)

{ "Article": { "title": "breaking news: policy engine released" } }

▶ Run

Contains All Of

Check if a list contains every element from another list:

__permissions__ of **User** contains all of ["read", "write"]

Interactive Example

Reset

Policy Rule

A **User** has full access if __permissions__ of **User** contains all of ["read", "write", "delete"].

Test Data (JSON)

{ "User": { "permissions": ["read", "write", "delete", "admin"] } }

▶ Run

Returns false if even one element is missing:

Interactive Example

Reset

Policy Rule

A **User** has full access if __permissions__ of **User** contains all of ["read", "write", "delete"].

Test Data (JSON)

{ "User": { "permissions": ["read", "write"] } }

▶ Run

Contains Any Of

Check if a list contains at least one element from another list:

__roles__ of **User** contains any of ["admin", "superadmin"]

Interactive Example

Reset

Policy Rule

A **User** has admin access if __roles__ of **User** contains any of ["admin", "superadmin"].

Test Data (JSON)

{ "User": { "roles": ["editor", "admin"] } }

▶ Run

Summary

Operator	Use case
is in [...]	Value is one of a set (allowlist)
is not in [...]	Value is none of a set (blocklist)
contains	String/collection contains a value
contains all of [...]	List contains every element from another list
contains any of [...]	List contains at least one element from another list