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1. roelof
   Member
   Posted 1 year ago #
   

   Hello,

   I try to make a custom pagination work.
   I put this in my functions.php

   function pagination_april( $query ) {
   if ( $query->monthnum=04&year=2005 ) {
   $query = new WP_Query( 'posts_per_page=1' );
   }
   }

   add_action( 'pre_get_posts', 'pagination_april' );

   But it won't work.
   Can anyone tell me what went wrong here.

   Roelof

2. alchymyth
   The Sweeper & Moderator
   Posted 1 year ago #
   

   php comparison operators
   http://php.net/manual/en/language.operators.comparison.php

   php logic operators
   http://php.net/manual/en/language.operators.logical.php

3. roelof
   Member
   Posted 1 year ago #
   

   Oke,

   So it must be :

   function pagination_april( $query ) {
    if ( $query->monthnum==04&&year==2005 ) {
    $query = new WP_Query( 'posts_per_page=1' );
    }
    }
   
   add_action( 'pre_get_posts', 'pagination_april' );

4. roelof
   Member
   Posted 1 year ago #
   

   Hello,

   I tried it but still no luck.
   Still all the articles are displayed.

   Anyone a idea ?

   Roelof

5. alchymyth
   The Sweeper & Moderator
   Posted 1 year ago #
   

   try to treat year and month seperately in the if statement:

   function pagination_april( $query ) {
    if ( $query->monthnum==04 && $query->year==2005 ) {
    $query = new WP_Query( 'posts_per_page=1' );
    }
    }
   
   add_action( 'pre_get_posts', 'pagination_april' );

6. roelof
   Member
   Posted 1 year ago #
   

   Hello,

   So i tried this :

   function pagination_april( $query ) {
    if ( $query->year==2005) {
       if ( $query->monthnum==04) {
    $query = new WP_Query( 'posts_per_page=1' );
    }
    }
   }
   
   add_action( 'pre_get_posts', 'pagination_april'

   But now I get a 500 error on my site.

   Roelof

7. roelof
   Member
   Posted 1 year ago #
   

   Hello,

   The 500 error is solved.
   But still the pagination is not working.

   But I did some research and found out this.

   The variable month and year are still 0.
   But there is a variable m which contains 200504.

   So I changed it to this :

   function pagination_april( $query ) {
    if ( $query->m==200504) {
          $query = new WP_Query( 'posts_per_page=1' );
    }
    }
   
   add_action( 'pre_get_posts', 'pagination_april'

   But then again a 500 error.
   It seems that WordPress cannot do what I need.

   Roelof

8. Helen Hou-Sandi
   Moderator
   Posted 1 year ago #
   

   You shouldn't need to set $query to a new WP_Query, but rather just do $query->set( 'posts_per_page', 1 );.

9. roelof
   Member
   Posted 1 year ago #
   

   Thank you
   But I still get 500 error.

   Roelof

10. Helen Hou-Sandi
    Moderator
    Posted 1 year ago #
    

    What did you do before that got rid of the 500 error?

    This may not be the cause of the problem, but you might try:

    function pagination_april( $query ) {
        // in 3.3, use is_main_query() instead
        global $wp_the_query;
        if ( $query->m == 200504 && $query === $wp_the_query ) {
            $query->set( 'posts_per_page', 1 );
        }
     }
    
    add_action( 'pre_get_posts', 'pagination_april' );

11. roelof
    Member
    Posted 1 year ago #
    

    I changed the /> to ?>

    Still a 500 error. It looks like WordPress does not like the use of the variable m .If I change it to month no 500 error but then the script does not work as expected.

    Roelof

12. roelof
    Member
    Posted 1 year ago #
    

    Oke,

    I found out if I change the permalinks to this : http://test.tamarawobben.nl/2005/04/

    year and month have the good values of 2005 and 04.
    But still this is not workimg.

    function pagination_april( $query ) {
    
    if ( $query->year==2005) {
        if ( $query->monthnum==04) {
                  $query->set( 'posts_per_page', 1 );
    }
     }
    }
    
    add_action( 'pre_get_posts', 'pagination_april');

    Roelof

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