English Wikipedia @ Freddythechick:Database reports/Polluted categories/Configuration

This report is updated every 7 days.

Source code

<syntaxhighlight lang="rust"> /* Public domain; bjweeks, MZMcBride, CBM, Tim Landscheidt; 2012, 2013 Copyright 2021 Kunal Mehta <legoktm@debian.org>

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.

*/

use anyhow::Result; use dbreps2::{dbr_link, str_vec, Frequency, Report}; use mysql_async::prelude::*; use mysql_async::Conn;

pub struct Row {

   page_title: String,

}

pub struct Pollcats {}

impl Report<Row> for Pollcats {

   fn title(&self) -> &'static str {
       "Polluted categories"
   }

   fn frequency(&self) -> Frequency {
       Frequency::Weekly
   }

   fn query(&self) -> &'static str {
       r#"

/* pollcats.rs SLOW_OK */ SELECT

 p1.page_title

FROM

 page AS p1

WHERE

 p1.page_namespace = 14
 AND NOT EXISTS(
   SELECT
     1
   FROM
     templatelinks
   JOIN linktarget
   ON tl_target_id = lt_id
   WHERE
     tl_from = p1.page_id
     AND lt_namespace = 10
     AND lt_title = 'Polluted_category'
 )
 AND EXISTS(
   SELECT
     1
   FROM
     page AS p2
     JOIN categorylinks ON cl_from = p2.page_id
   WHERE
     cl_to = p1.page_title
     AND p2.page_namespace IN (2, 3)
 )
 AND EXISTS(
   SELECT
     1
   FROM
     page AS p3
     JOIN categorylinks ON cl_from = p3.page_id
   WHERE
     cl_to = p1.page_title
     AND p3.page_namespace = 0
 )

LIMIT

 1000;

"#

   }

   async fn run_query(&self, conn: &mut Conn) -> Result<Vec<Row>> {
       let rows = conn
           .query_map(self.query(), |(page_title,)| Row { page_title })
           .await?;
       Ok(rows)
   }

   fn intro(&self) -> &'static str {
       "Categories that contain pages in the (Main) namespace and the user namespaces (limited to the first 1000 entries)"
   }

   fn headings(&self) -> Vec<&'static str> {
       vec!["Category"]
   }

   fn format_row(&self, row: &Row) -> Vec<String> {
       str_vec![dbr_link(&row.page_title)]
   }

   fn code(&self) -> &'static str {
       include_str!("pollcats.rs")
   }

} </syntaxhighlight>