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POCodeIgniter, Order by number of rows in a separate joined table?
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2011-07-31T11:03:18.143
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I have 4 tables that link together... Firstly the hotels table <ul> <li>hotel_id</li> <li>town_id</li> <li>hotel_name</li> </ul> Then the towns table: <ul> <li>town_id</li> <li>region_id</li> <li>town_name</li> </ul> Then the regions table: <ul> <li>region_id</li> <li>country_id</li> <li>region_name</li> </ul> Finally the countries table <ul> <li>country_id</li> <li>country_name</li> </ul> What I need to do is list the towns in order of how many hotels there are within that town. The reason I have included the regions table and the countries table is because, when displaying that town, I need to display the country it's from. This can only be obtained via the regions table.. Therefore using the active records in CodeIgniter I have done this so far: <pre><code>$this->db->join('regions','towns.town_region_id = regions.region_id'); $this->db->join('countries','regions.region_country_id = countries.country_id'); $query = $this->db->get('towns'); foreach ($query->result() as $row) { echo "<li>"; echo "$row->town_name, $row->country_name"; echo "</li>"; } </code></pre> This outputs: <ul> <li>London, United Kingdom</li> <li>Washington, United States</li> <li>New York, United States</li> <li>Moscow, Russia</li> <li>etc, etc</li> </ul> Each one of these cities have hotels in them. All I need now is to order them by how many hotels there are in each town.. Any help would be much appreciated! Thanks.
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<php><mysql><codeigniter>
Title
CodeIgniter, Order by number of rows in a separate joined table?
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A row detail

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