Only show posts from a certain subcategory - php

Question

Im using this php code on my page to show subcategories, and when click on certain subcategory should redirect to posts that have that subcategory:
<?php
wp_list_categories( array(
'taxonomy' => 'categorys',
'title_li' => '',
'child_of' => get_term_by( 'slug', 'osten', 'categorys' )->term_id,
) );
?>
I created taxonomy.php
I have 6 categories to filter these posts and each Category have its subcategories.
SO i need to filter posts, when i click on subcategory to show me only posts on it.
I used this code inside taxonomy.php but its showing me all of posts and not filtering by clicked subcategory:
<?php
$post_type = 'ortemp';
// Get all the taxonomies for this post type
$taxonomies = get_object_taxonomies($post_type); // names (default)
foreach( $taxonomies as $taxonomy ) :
// Gets every "category" (term) in this taxonomy to get the respective posts
$terms = get_terms( $taxonomy );
echo '<div id="activities_categories">';
foreach( $terms as $term ) :
$customposts = new WP_Query(
array(
'posts_per_page' => -1,
'tax_query' => array(
array(
'taxonomy' => $taxonomy,
'terms' => $term->slug,
'field' => 'slug',
// 'category' => 'category-1'
)
)
)
);
if( $customposts->have_posts() ):
while( $customposts->have_posts() ) : $customposts->the_post();
echo '<li>' . get_the_title() . '</li>';
endwhile;
endif;
endforeach;
echo '</div>';
endforeach;
?>

Answer 1

try these code to your 'taxonomy.php' file.
$currentTerm = get_queried_object();
$subTerms = get_term_children( $currentTerm->term_id, $currentTerm->taxonomy );
if ( ! empty( $subTerms ) ) {
echo '<div id="activities_categories">';
foreach ( $subTerms as $subTerm ) :
$customposts = new WP_Query(
array(
'posts_per_page' => - 1,
'tax_query' => array(
array(
'taxonomy' => $currentTerm->taxonomy,
'terms' => $subTerm,
'field' => 'term_id',
)
)
)
);
if ( $customposts->have_posts() ):
while ( $customposts->have_posts() ) : $customposts->the_post();
echo '<li>' . get_the_title() . '</li>';
endwhile;
endif;
endforeach;
echo '</div>';
}
another example
$currentTerm = get_queried_object();
$subTerms = get_term_children( $currentTerm->term_id, $currentTerm->taxonomy );
if ( ! empty( $subTerms ) ) {
echo '<div id="activities_categories">';
$customposts = new WP_Query(
array(
'posts_per_page' => - 1,
'tax_query' => array(
array(
'taxonomy' => $currentTerm->taxonomy,
'field' => 'term_id',
'terms' => $subTerms,
)
)
)
);
if ( $customposts->have_posts() ):
while ( $customposts->have_posts() ) : $customposts->the_post();
echo '<li>' . get_the_title() . '</li>';
endwhile;
endif;
echo '</div>';
}