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Custom Validation

Business logic is changeable, you can't do all the functions with built-in validation, so you can implement custom validation by using a function.

You can do this using the validation property of the RCREFormItem component.

jsx harmony
<RCREFormItem
    required={true}
    validation={({ $args }) => {
        // use $args.value to access 
        if ($args.value !== "123456") {
            return {
                isValid: false,
                errmsg: "data should equal to 123456"
            };
        }
        return {
            isValid: true,
            errmsg: ""
        };
    }}
>
    {({ valid, errmsg }) => (
        <FormItem
            required={true}
            label="UserName:"
            validateStatus={valid ? "success" : "error"}
            help={errmsg}
        >
            <ESInput name="username" />
        </FormItem>
    )}
</RCREFormItem>

Within the validation function, you can use the $data variable to access Container's data.

Online example: