Next and previous post link in same terms custom taxonomy

I've created a custom taxonomy => cat-blog in my custom post => blog, cat-blog have 4 terms and each terms have list of post belong to that term

Example of terms:

- City Updates (4 post belong)
- Home Tips (6 post belong)
- Real Estate Guide (8 post belong)
- Real Estate Industry (9 post belong)

and using this query

<?php
     $query = new WP_Query(array('posts_per_page' => 2, 'post_type' => 'blog', 'blog-cat' => get_the_term_list( $post->ID, 'blog-cat' )));
     while ($query->have_posts()) : $query->the_post();
     ?>

   <?php 
// content here
?>

    <?php endwhile; ?>
    <?php wp_reset_query(); ?>
 <?php

 ?>

to display 2 post in same category, AND I just want to put next and prev pagination, so I can navigate the rest of the post, belong to that term.

Solution

Don't ever change the main query for a custom query on archive pages and on the home page. The main query already does what you want to do. Trying to run a custom query to try and get the same result is like reinventing the wheel. It also causes problems with pagination

SOLUTION

First, remove your custom query, and return to the main loop. The following is all you need in your taxonomy.php
```
if( have_posts() ) {
   while( have_posts() ) {
     the_post();

     //REST OF YOUR LOOP

   }
}
```

Use pre_get_posts in conjuction with the conditional tags if you need to alter the main query. For instance, if you need 2 posts per page on your taxonomy page, do the following in functions.php

function so26499451_custom_ppp( $query ) {
    if ( !is_admin() && $query->is_tax() && $query->is_main_query() ) {
        $query->set( 'posts_per_page', '2' );
    }
}
add_action( 'pre_get_posts', 'so26499451_custom_ppp' );

You can now paginate as normal without any problems. You will now see two posts from the specific term that you clicked on per page on your taxonomy.php.