I'm using instructions form page http://docs.silverstripe.org/en/3.1/developer_guides/search/searchcontext/

I've got code:

<?php

class MyDataObject extends DataObject {

    private static $db = array(
        'PublicProperty' => 'Text'
        'HiddenProperty' => 'Text',
        'MyDate' => 'Int'
    );

    public function getCustomSearchContext() {
        $fields = $this->scaffoldSearchFields(array(
            'restrictFields' => array('PublicProperty','MyDate')
        ));

        $filters = array(
            'PublicProperty' => new PartialMatchFilter('PublicProperty'),
            'MyDate' => new GreaterThanFilter('MyDate')
        );

        return new SearchContext(
            $this->class, 
            $fields, 
            $filters
        );
    }
}
 

My questions are:
1. How can I add next field as bellow:
'MyDate' => new LessThanFilter('MyDate') ?

I added this but without effects. Maybe is other solution to make field with values from to?

2. How can I change labels name?

It's easier to configure the dataobject - there are configuration settings for these options. Something like 'searchable_fields' which provides an array for field, filter & label.

If you search the api you should find it. My battery is running out so I can't find link sorry.

Thanks for reply. It was usefull. My working code on dataobject page is:

public function getCustomSearchContext() {
$fields = new FieldList();
$fields->push(new TextField('FirstName', 'Name'));
$fields->push(new TextField('BirthYear', '1'));
$fields->push(new TextField('BirthYear2', '2'));
$fields->push(new DropdownField(
'DeathDate',
'Choose a town',
array(
'1900' => '1900',
'1930' => '1930',
'1960' => '1960',
'1990' => '1990'
)));
$filters = array(
'FirstName' => new PartialMatchFilter('FirstName'),
'BirthYear' => new GreaterThanOrEqualFilter('BirthYear'),
'DeathDate' => new GreaterThanOrEqualFilter('DeathDate'),
'BirthYear2' => new LessThanOrEqualFilter('BirthYear')
);

return new SearchContext(
$this->class,
$fields,
$filters
);
}