This is a mapping of models to [custom validators](../customization/custom-validation.md) that have been defined locally to enforce custom validation logic. An example is provided below:
```python
CUSTOM_VALIDATORS = {
"dcim.site": [
{
"name": {
"min_length": 5,
"max_length": 30
}
},
"my_plugin.validators.Validator1"
],
"dim.device": [
"my_plugin.validators.Validator1"
]
}
```
---
## FIELD_CHOICES
Some static choice fields on models can be configured with custom values. This is done by defining `FIELD_CHOICES` as a dictionary mapping model fields to their choices. Each choice in the list must have a database value and a human-friendly label, and may optionally specify a color. (A list of available colors is provided below.)
The choices provided can either replace the stock choices provided by NetBox, or append to them. To _replace_ the available choices, specify the app, model, and field name separated by dots. For example, the site model would be referenced as `dcim.Site.status`. To _extend_ the available choices, append a plus sign to the end of this string (e.g. `dcim.Site.status+`).
For example, the following configuration would replace the default site status choices with the options Foo, Bar, and Baz:
```python
FIELD_CHOICES = {
'dcim.Site.status': (
('foo', 'Foo', 'red'),
('bar', 'Bar', 'green'),
('baz', 'Baz', 'blue'),
)
}
```
Appending a plus sign to the field identifier would instead _add_ these choices to the ones already offered:
```python
FIELD_CHOICES = {
'dcim.Site.status+': (
...
)
}
```
The following model fields support configurable choices:
