Adding count_only query to LLMS_Query_Quiz_Attempt.

Author: brianhogg

includes/abstracts/abstract.llms.database.query.php

@@ -207,6 +207,13 @@ protected function sql_limit() {
 
 		global $wpdb;
 
+		$sql = '';
+
+		// No limit or per-page when doing a count-only query.
+		if ( $this->get( 'count_only' ) ) {
+			return $sql;
+		}
+
 		$sql = $wpdb->prepare( 'LIMIT %d, %d', $this->get_skip(), $this->get( 'per_page' ) );
 
 		/**

includes/admin/reporting/tables/llms.table.quizzes.php

@@ -163,8 +163,8 @@ protected function get_data( $key, $data ) {
 			case 'attempts':
 				$query = new LLMS_Query_Quiz_Attempt(
 					array(
-						'quiz_id'  => $quiz->get( 'id' ),
-						'per_page' => 1,
+						'quiz_id'    => $quiz->get( 'id' ),
+						'count_only' => true,
 					)
 				);
 
@@ -175,7 +175,7 @@ protected function get_data( $key, $data ) {
 						'quiz_id' => $quiz->get( 'id' ),
 					)
 				);
-				$value = '<a href="' . $url . '">' . $query->get_found_results() . '</a>';
+				$value = '<a href="' . $url . '">' . $query->get_count_only_result() . '</a>';
 
 				break;
 

includes/class.llms.query.quiz.attempt.php

@@ -145,8 +145,12 @@ protected function prepare_query() {
 		global $wpdb;
 
 		$select = 'SELECT SQL_CALC_FOUND_ROWS qa.id';
-		$from   = "FROM {$wpdb->prefix}lifterlms_quiz_attempts qa";
-		$joins  = $this->sql_joins();
+		if ( $this->get( 'count_only' ) ) {
+			$select = 'SELECT COUNT(*) AS total';
+		}
+
+		$from  = "FROM {$wpdb->prefix}lifterlms_quiz_attempts qa";
+		$joins = $this->sql_joins();
 
 		return "{$select} {$from} {$joins} {$this->sql_where()} {$this->sql_orderby()} {$this->sql_limit()};";
 	}