Rule Engine (rule-engine.ob)

A basic conditions based rules engine to check whether an schema passes the rule

Example

Rule schema

The rules are composed by 3 basic components

1. all
2. any
3. condition

• An all block is an array of rules in which every rule should evaluate as true
• An any block is an array of rules in which at least one rule should evaluate as true
• A condition is an object with the fields:
  1. field - The name of field of the schema to check
  2. operator - The operator used to compare the values
  3. value - The value against the rule compare the schema field

Example

const rule = {
    all: [
        {
            any: [
                {
                    field: 'name',
                    operator: '=',
                    value: 'John'
                },
                {
                    field: 'name',
                    operator: '<>',
                    value: 'Daenerys'
                }
            ],
            {
                field: 'age',
                operator: '>',
                value: 25
            }
        }
    ]
};