The max validation keyword is used to specify a minimum limit for the value of a field. This limit can apply to the length of a string or array, or the value of a number.
The max keyword can be added to a field definition in the schema and accepts either a number or a function returning a number.
{
fieldName: {dType: "String", max: 5}
}In the example above, the fieldName field must be a string with 5 or fewer characters.
{
fieldName: {dType: "Array", max: 2}
}In the above example, the fieldName field must be an array with 3 or fewer elements.
{
fieldName: {dType: "Number", max: () => 3}
}In the above example, the fieldName field must be a number less than or equal to 3. If a function is provided, it will be called with the parameters (value, contract, dType, depth), and should return the maximum limit.
The max validator is applicable only to the String, Array, and Number data types.
The error message for max is dynamic and indicates the minimum limit. For a string, the message is "must have at least {maxCount} characters". For an array, the message is "must have at least {maxCount} elements". For a number, the message is "must be greater than or equal to {maxCount}".
The i18next keys for these validation errors are errors:max.String for strings, errors:max.Array for arrays, and errors:max.Number for numbers. For internationalization (i18n), you can provide translations for these keys in your i18n resource bundle.