Composite validation
In the section about [simple validation][simple-validation] we saw how
to use a simple validation. Now we will learn how to create more
complex validation rules.
There are two "composite" validators in our framework: `or` and `and`
validators. First, let's look in which cases `or` validator can be useful.
For example we have a text field in our form, and this field can
accept either three-character alpabetic CODE or nine-character ID. This
situation can be easily solved with combination of `or` and `and` validators:
```javascript
...
"field": {
"renderer": "text",
"validators": [{
"rule": "or",
"value": [{
"rule": "and",
"value": [{
"rule": "alphabetics"
}, {
"rule": "length",
"value": 3
}]
}, {
"rule": "and",
"value": [{
"rule": "numbers"
}, {
"rule": "length",
"value": 9
}]
}],
"message": "Only 3-characters CODE or 9-characters ID allowed"
}]
},
...
```
You can nest "or" into "and" and vice verse. Below you will find a complete example of a composite validation.
[simple-validation]: http://react-form-generator.readthedocs.org/en/latest/basic/simple-validation/