Reveal keywords on project's catalogue page

application/config/migration.php

@@ -2,5 +2,5 @@
 
 $config['migration_enabled'] = TRUE;
 $config['migration_type'] = 'sequential';
-$config['migration_version'] = 2;
+$config['migration_version'] = 4;
 $config['migration_path'] = APPPATH . 'migrations/';

application/controllers/cron/Keywords_stats.php

@@ -0,0 +1,32 @@
+<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
+
+class Keywords_stats extends CI_Controller
+{
+	public function update_keywords_stats()
+	{
+		// Some keywords are not in use at all.
+		// Initialise count field to zero before tallying counts.
+
+		$sql = '
+			UPDATE keywords
+			SET count = 0';
+		$this->db->query($sql);
+
+		$sql = '
+			UPDATE keywords
+			JOIN
+			(SELECT pk.keyword_id as keyword_id, COUNT(pk.project_id) AS count
+        		FROM project_keywords pk
+        		GROUP BY 1
+			) as sub
+			ON keywords.id = sub.keyword_id
+			SET keywords.count = sub.count ';
+		$this->db->query($sql);
+
+	}
+}
+
+
+/* End of file Keyword_stats.php */
+/* Location: ./application/controllers/cron/Keyword_stats.php */
+

application/migrations/003_add_keywords_count_field.php

@@ -0,0 +1,22 @@
+<?php
+
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+class Migration_Add_keywords_count_field extends CI_Migration {
+
+        public function up()
+        {
+		$fields = array(
+        		'count' => array('type' => 'INT',
+			'default' => '0',
+			'after' => 'value')
+		);
+		$this->dbforge->add_column('keywords', $fields);
+        }
+
+        public function down()
+        {
+                $this->dbforge->drop_column('keywords', 'count');
+        }
+}
+

application/migrations/004_drop_redundant_keywords_from_projects.php

@@ -0,0 +1,52 @@
+<?php
+
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+class Migration_Drop_redundant_keywords_from_projects extends CI_Migration {
+
+        public function up()
+        {
+    		$sql = '
+		DELETE pk2.*
+		FROM project_keywords pk2
+		WHERE keyword_id IN
+		(
+			SELECT id 
+			FROM keywords k 
+			WHERE k.value in (
+			"librivox", 
+			"ibrivox",
+			"llibrivox",
+			"librixox",
+			"librivox;",
+			"libriox",
+			"libirivox",
+			"librivos",
+			"audio",
+			"audiobook",
+			"audiobooks",
+			"audio books",
+			"audio book",
+			"audioboek",
+			"audiobuch",
+			"audiobooklibrivox",
+			"audibook",
+			"audioook",
+			"autiobook",
+			"audiobook:",
+			"audioboo",
+			"audiolibro",
+			"audio libro",
+			"audiolibros",
+			"audiolivre",
+			"audiolivro"
+			)
+		)';
+    		$this->db->query($sql);
+        }
+
+        public function down()
+        {
+                ;
+        }
+}

application/models/Project_keyword_model.php

@@ -3,7 +3,6 @@
 class Project_keyword_model extends MY_Model {
 
 
-
 }
 
 /* End of file project_keyword.php */