Wordpress税务查询不起作用？

Question

任何人都可以建议为什么以下WP查询不起作用？

           <?php if (is_page(10)) {
                $taxTerm = "restaurants";
            } elseif (is_page(12)) {
                $taxTerm = "offices";
            } elseif (is_page(14)) {
                $taxTerm = "hotels";
            } elseif (is_page(16)) {
                $taxTerm = "flowers";
            } elseif (is_page(18)) {
                $taxTerm = "green-walls";
            }

                    $args = array(
                    'post_type' => 'gallery_items',
                    'tax_query' => array(
                        array(
                            'taxonomy' => 'industries',
                            'field'    => 'slug',
                            'terms'    => $taxTerm,
                        ),
                    ),
                    'order' => 'DESC',
                    'orderby'   => 'title',
                    'posts_per_page' => '5',
                    );

它似乎不喜欢tax_query？虽然这个编码与编码时的编码匹配吗？