Condition Tree

Condition trees are a way to define custom conditions for various Skate Results features. With condition trees, you can access variables of a given context and define conditions based on them.

Syntax

Condition trees are written in JSON format. If you are not familiar with JSON, please check out the official JSON documentation.

A condition tree is an object with a single key-value pair. The key is the operator, and the value is an array of arguments. The arguments can be either values or other condition trees. A value can either be a string, number, boolean, null, or a reference to a variable in the context. To reference a variable, use the ref key with the variable name as the value.

{ "ref": "athlete.name" }

The following table lists all available operators and their syntax.

Syntax	`arg1`	`arg2`	Explanation
`true`			Resolves to `true`.
`false`			Resolves to `false`.
`{ "or": arg1 }`	Array: cond. trees		Resolves to `true`, if any item of `arg1` is `true`.
`{ "and": arg1 }`	Array: cond. trees		Resolves to `true`, if all items of `arg1` are `true`.
`{ "not": arg1 }`	Condition tree		Resolves to the opposite of `arg1`.
`{ ">": [arg1, arg2] }`	String, Number or ref.	String, Number or ref.	Resolves to `true`, if `arg1` is greater than `arg2`. Resolves to `false`, if an argument is not a number or string.
`{ ">=": [arg1, arg2] }`	String, Number or ref.	String, Number or ref.	Resolves to `true`, if `arg1` is greater or equal to `arg2`. Resolves to `false`, if an argument is not a number.
`{ "<": [arg1, arg2] }`	String, Number or ref.	String, Number or ref.	Resolves to `true`, if `arg1` is less than `arg2`. Resolve to `false`, if an argument is not a number.
`{ "<=": [arg1, arg2] }`	String, Number or ref.	String, Number or ref.	Resolves to `true`, if `arg1` is less or equal to `arg2`. Resolves to `false`, if types are not numbers.
`{ "==": [arg1, arg2] }`	Value or ref.	Value or ref.	Resolves to `true`, if `arg1` equals `arg2`. Resolves to `false`, if types of arguments are different.
`{ "!=": [arg1, arg2] }`	Value or ref.	Value or ref.	Resolves to `false`, if `arg1` does not equal `arg2`. Resolves to `true`, if types of arguments are different.
`{ "in": [arg1, arg2] }`	Value or ref.	Array: Value or ref	Resolves to `true`, if `arg1` is in `arg2`. Resolves to `false`, if types of arguments are different.
`{ "not-in": [arg1, arg2] }`	Value or ref.	Array: Value or ref	Resolves to `true`, if `arg1` is not in `arg2`. Resolves to `false`, if types of arguments are different.

Example

The following condition tree resolves to true, if the athlete's name is "Andi" and the athlete's gender is not "female".

{
  "and": [
    { "==": [{ "ref": "athlete.name" }, "Andi"] },
    { "!=": [{ "ref": "athlete.gender" }, "female"] }
  ]
}

Features

Condition trees are currently used in the following features:

Forms (work in progress): Conditional fields, emails, and validations
Livestream inserts: Conditionally show/hide sources

Syntax​

Example​

Features​

Syntax

Example

Features