Index more CCK fields by default

Yes. Can we do these things in the 6.x-2.x branch? It already has a much more flexible API for dealing with CCK.

Here's a hook_apachesolr_cck_fields_alter implementation I used to successfully add facets for integer fields for apachesolr version = "6.x-1.2"
In this case it was for real estate listings to provide 'Bedrooms' and 'Bathrooms' facets.

<?php
/**
* Implementation of hook_apachesolr_cck_fields_alter
*
* @param $mappings
*   The existing array, received by reference, of the cck mappings.
*/
function [MODULENAME]_apachesolr_cck_fields_alter(&$mappings) {
  $mappings['number_integer'] = array(
    'number' => array(
      'callback' => '',
      'index_type' => 'integer',
      'facets' => TRUE,
    ),
    'optionwidgets_select' => array(
      'callback' => '',
      'index_type' => 'integer',
      'facets' => TRUE,
    ),
    'optionwidgets_buttons' => array(
      'callback' => '',
      'index_type' => 'integer',
      'facets' => TRUE,
    ),
    'optionwidgets_onoff' => array(
      'callback' => '',
      'index_type' => 'integer',
      'facets' => TRUE,
    ),
  );
}
?>

You'll also then need to enable the facets at: /admin/settings/apachesolr/enabled-filters

HTH,

DT

And one more update, here's what I needed to do to get integer field facets working with version = "6.x-2.0-beta3"

<?php
/**
* Implementation of hook_apachesolr_cck_fields_alter
*
* @param $mappings
*   The existing array, received by reference, of the cck mappings.
*/
function example_apachesolr_cck_fields_alter(&$mappings) {
  $mappings['number_integer'] = array(
    'number' => array(
      'indexing_callback' => 'example_integer_indexing_callback',
      'display_callback' => 'apachesolr_cck_text_field_callback',
      'index_type' => 'integer',
      'facets' => TRUE,
    ),
    'optionwidgets_select' => array(
      'indexing_callback' => 'example_integer_indexing_callback',
      'display_callback' => 'apachesolr_cck_text_field_callback',
      'index_type' => 'integer',
      'facets' => TRUE,
    ),
    'optionwidgets_buttons' => array(
      'indexing_callback' => 'example_integer_indexing_callback',
      'display_callback' => 'apachesolr_cck_text_field_callback',
      'index_type' => 'integer',
      'facets' => TRUE,
    ),
    'optionwidgets_onoff' => array(
      'indexing_callback' => 'example_integer_indexing_callback',
      'display_callback' => 'apachesolr_cck_text_field_callback',
      'index_type' => 'integer',
      'facets' => TRUE,
    ),
  );
}

function example_integer_indexing_callback($node, $field_name, $cck_info) {
  $fields = array();
  if (isset($node->{$field_name})) {
    $cck_info['index_type'] = 'integer'; // needed?
    $index_key = apachesolr_index_key($cck_info);
    foreach ($node->$field_name as $field) {
      if ($index_value = isset($field['value']) ? (int) $field['value'] : FALSE) {
        $fields[] = array(
          'key' => $index_key,
          'value' => $index_value,
        );
      }
    }
  }
  return $fields;
}
?>

I see the new code has facet info for some integer fields, but not the default 'number' one.
So perhaps the other widget types aren't needed here.

below is invalid, sorry

the patch #3 on 6.x-2.x-beta3 do not add integer with widget "textfield"

It only add widget "select" or "checkbox"

patch #3 tested on 6.x-beta3.

I have no idea what #5 is talking about, but i can have filters on integers value that use dropdown/checkbox as widget.